GidList 2000

On: Thu Jan 6 00:44:59 CET 2000

Hello,
	does anyone know if it is possible to write a file format converter from unsructured fluent data to GID for 
postprocessing, or even better has someone done this already. 
Thanks
Ryan

Here comes your message 
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   Hello,

   As you have seen, we have recently set up this list in order to
   discuss problems related to GiD.

   Welcome to all the people that has already joined to us!!

   One of the things that will be exposed in the list will be the
   announcements of new GiD beta versions. These beta versions are
   thought for the experienced or adventurous user who wants to enjoy
   the new capabilities of the program. 

   The last beta version has been made public recently and can be
   found in:

      ftp://gid.cimne.upc.es/pub/gid_adds

   Its name is: 5.0p49b2

   I hope that it will be useful for everybody.

-- 
Centre Internacional de Mètodes             Ramon Ribó 
Numèrics en Enginyeria        	           
                                            ...
The beta version looks fine and I haven't found any
particular problems using it yet!

Some general problems:

I have about 180 sets of results to display in the
postprocessor. My problem is the pop menu selection will not
fit on the screen!

The  GID seems to be catching the stdout from an invoked
process, is it possible to view it.

Mark Spink

   Hello,

   When there are many mesh sets, you should select and deselect them
   in the 'View Style' window.

   When there are many steps, window 'View Results' should be used.

   If a process is invoked from a PROBLEMTYPE.bat file, the way to see
   process info is the following:

     - You should redirect your stdout to a file. For example:

           %3myprogram %1.dat > %1.log (in the .bat file in Windows95/98/NT)

     - You should tell GiD to consider this file as the output:

           rem    OutputFile: %1.log    (in the .bat file in Windows95/98/NT)

     - To see this information from GiD, check 

             Calculate->Calculate window->Output view  (inside GiD)

   With recent GiD releases (beta versions), there is a similar way of
   writing an error file from the process.

   Best regards,

Mark Spink writes:
 > The beta version looks fine and I haven't found any
 > particular problems using it yet!
 > 
 > Some general problems:
 > 
 > I have about 180 sets of results to display in the
 > postprocessor. My problem is the pop menu selection will not
 > fit on the screen!
 > 
 > The  GID seems to be catching the stdout from an invoked
 > process, is it possible to view it.
 > 
 > Mark Spink

-- 
Centre Internacional de Mètodes             Ramon Ribó 
Numèrics en Enginyeria        	           
                                            ...
  Hello,

  GiD+ has been added to the GiD web page. This is an environment
  where it is possible to add new calculations modules. Check the
  following web page for details:

      http://gid.cimne.upc.es/gidplus/index.html

  Regards,

-- 
Centre Internacional de Mètodes             Ramon Ribó 
Numèrics en Enginyeria        	           
                                            ramsan at cimne.upc.es 
C/ Gran Capitan s/n,                        
Modulo C1, Campus Norte UPC,                tel. +34 93 401 74 03   
E-08034 Barcelona, Spain                    fax. +34 93 401 65 17

...
Hi everybody,
Can anyone please tell me which kind of geometries is Cordal Error function
useful for?
Thanks in advance,

Karl

Hello!,

After "trying" a few days GiD 5.0 p47, here you are a few suggestions to improve the program from the point of view of a Windows NT FEA user:

1. FILES menu
- To use the word "Open" instead "Read" to load a GiD Project (*.gid). "Read" seems to load something on an "existing" project, but not to open a project.
- IMPORT/EXPORT: to use the Windows Explorer style when dealing with files, now all is UNIX style.
- FILTERS: To use filters to select only files of desired type (*.igs, *.IGES). 
- FILE PROPERTIES: Also in the oppening window to have the option to see file size, file attributes, date, an image preview of file (in case of *.gid project), etc... .
- Network drivers letters (say F:) are not directly visible, I have to use Windows Explorer to see the letter driver name.
- When Exporting to add extensions automaticaly to output file, for instance, when exporting IGES, to add automaticaly .IGS extension to the file name.
- To import/export STEP AP203/214 files, Parasolid v11 & ACIS (*.sat) v5.0
- To open multiple projects simultaneously

2. SCREEN layout
- ICONS: to use icons more actively, for instance, I miss icons to set plan, top, side, isometric view, etc .. zoom previous, etc.. Also a litle of color in the current icons is welcome!.
- To modify the axis style: I suggest a more elaborate axis, but also simply as well. Axis to change location, not only in the left corner, but appear exactly in the coordinates origin (0,0,0,). Only when origin is not visible, to the left corner. In FEA, origin location & axis orientation knowledge is a must!.
- ICON to swich between "View Geometry" & "View mesh"
- REPEATING commands feature ON: for instance, after finishing the use LINE command, hitting "Enter" key will ask again for "1st Point" without the need to go to menus. Or ZOOMIN icon needds to hit repeately each time to do consecutive zoomins.
- LABELS ON: future entities created after issuing LABELS ALL to draw the label on the screen automaticaly, without the need to issue LABELS ALL again.
- "ESC" feature: all commands require to hit "ESC" key to finish, in this sense some times this is an unnecesary additional task to perform, is better & faster to close command automaticaly after finishing action (hit ENTER key to use again ?). Also, not possible to abort command (for instance, "Delete Lines"), "ESC" means to "accept" selection, instead "Cancel" execution. If Copying/moving entities and make a mistake in selection, not possible to ABORT command, ESC means to accept selection, only remedy is to de-select entities, but in big models this is imposible.
- Information on the screen of the LAYER active
- HELP on the screen mouse buttom when arrow on top of ICONS. Also, help description of commands in the bottom window when surfing over the menu with the mouse, now it´s run only after issuing the command.
- To SAVE views with a name, and an option to RESTORE view saved.
- Multiple windows: "n" command seems to open new windows, but how to tile & manage?
- 

3. GEOMETRIC ENTITIES
- List entities on Screen (points, lines, surfaces, volumes), not one-by-one, but to list all entities in a window where the user moving the vertical scroll bar can surf the entire list.
- Structured four-sided surface creation by: 2 edge curves (the other two edge curves of the surface are formed by joining the end points) or 4 points, giving the option "underlying surface" connecting points by curves lying on indicated underlying surface.
- Surface/Surface intersection: give the option to trim surfaces automaticaly by the curve intersection.
- Surface Fillet: creation of a circular surface fillet of a specified radius between two surfaces, giving the option to trim the original surfaces.
- Curve Fillet: creates a circular fillet of a specified radius between 2 curves (optionaly do not triming curves up to start of the fillet)
- To List defined local coordinate systems.
- To define Loads & Boundary Conditions based in that Local or Global Coordinate systems.
- To break structured surface by a point -that lie in the surface- optionaly without need to indicate U or V sense: if specified point lies on an edge, two surfaces are created, otherwise four surfaces are created.
- To split a surface by a curve line.
- To improve actual COPY command: when extruding surfaces/volumes by translation, rotation, mirror, etc.. based on line & surfaces meshed (nodes & elements asociated to that primitive), to create quadrilateral 4-nodes elements (if source is a line meshed with 2-nodes line elements) or triangular prismatic solid 6-nodes elements (if source is a surface meshed with 3-nodes triangular elements), or 8-20 nodes hexaedra solid elements (if source is a surface meshed with 4-8-nodes quadrilateral elements).
- Also, to add the option "spacing ratio" to COPY command to control the spacing element layers in the direcction of the extrusion/sweeping if the source primitive entity (line or surface) is meshed. To use the following criteria: uniform spacing, or enter a value less than 1.0 meaning that element size will progressively decrease along the direction of extrusion, or enter a value greater than 1.0 meaning that the element size will progressively increase in the direction of extrusion/sweeping.
- DRAG & GLIDE commands: creation of new surfaces or volumes by dragging & moving a pattern of curves or surfaces along a profile formed by other curves. Optionaly, associated 1-D & 2-D mesh of source primitives (curves or surfaces) are also dragged & glided to generate 2-D (triangular or quadrilateral) elements or 3-D (prismatic 6-nodes or brick 8-nodes) elements.
- To create a point in a node
- Curve normal from a point: a command to projects a normal from a point to a curve (optionaly breaking curve at projected point)

4. DATA
- To Change the actual 3 points based Local coordinates systems creation: 1st point origin, 2nd point on X-axis, and 3rth point in plane X-Y (not Z-axis). This will avoid creation of a new point to define Z-axis, simply using 3 points of a surface defines Z-Axis normal to that surface.
- To set actived a local coodinate system to apply loads & boundary coonditions.
- To Draw Local Axis, loads & boundary conditions permanently in the screen (also an option to erase).
- To List in a window in the screen (not one-by-one, but full list) local coordinate systems, loads & boundary conditions.
- To integrate GiD & COSMOS/M 2.5

5. MESHING
- Meshing of non-structured volumes with HEXAEDRAL elements (great !!)
- To display mesh & geometry (points, surfaces, etc..) simultaneously
- To improve 2-D meshing rendering
- To mesh points with 1-node elements (MASS, SPRING, etc..)
- To mesh volumes with high-order TETRA10 elements.

Best regards,
Blas.

~~~~~~~~~~~~~~~~~~~~~~
Blas Molero Hidalgo
Director

Tecnologías CAE Avanzadas, S.L.
Parque Tecnológico de Zamudio - Edificio Central, nº 101
48170 Zamudio (SPAIN)
Tel.	+34 94 420 93 54
Fax. 	+34 94 420 93 55
E-mail:	...
I cannot figure out how to define "sets" in GID,
i.e. choose a certain number of elements or nodes
and name them as a set.
Any suggestions?
Thanks.

Sebnem

Dear Sebnem

There are several ways of defining sets in GiD. They basically depend on the
way you work with it. As you know, GiD allows working like an end-user and
working on the development of interfaces with calculation codes.

a) DEVELOPING INTERFACES

On one hand, if you work developing interfaces, you can include in your
materials file and/or conditions file some generic sets (see example in part
c).

b) AS AN END-USER

On the other hand, if you work as an end-user you can select sets of nodes
or elements. Afterwards, you can assign the material and/or condition you
are interested in to the this selection.
Visualising the mesh, you will be able to select specific groups of
nodes/elements and assign different labels. If you want to define sets by
geometry, you can add other conditions in agreement with the geometric
entity you want to use.

c) EXAMPLE:

FILE OF MATERIALS

problemtype.mat file:
NUMBER: 1 MATERIAL: Set1
QUESTION: Name
VALUE: Set1
END MATERIAL
NUMBER: 2 MATERIAL: Set2
QUESTION: Name
VALUE: Set2
END MATERIAL

FILE OF CONDITIONS

problemtype.cnd file:
NUMBER: 1 CONDITION: SetNodes
CONDTYPE: over surfaces
CONDMESHTYPE: over nodes
QUESTION: Name
VALUE: Set1-Nodes
END CONDITION
NUMBER: 2 CONDITION: SetElements
CONDTYPE: over surfaces
CONDMESHTYPE: over elements
QUESTION: Name
VALUE: Set1-Elements
END CONDITION

If you need further information, please contact me.

Carles

----------------------------------------------------------
I cannot figure out how to define "sets" in GID,
i.e. choose a certain number of elements or nodes
and name them as a set.
Any suggestions?
Thanks.

Sebnem

...
> I cannot figure out how to define "sets" in GID,
> i.e. choose a certain number of elements or nodes
> and name them as a set.

try to use layers

luc

Hello,

I use GiD without difficulties to calculate some mechanical parts. I wish to calculate a contact between a cylinder and a plate thick to study in 3 
measurements the pressure of hertz. I don't manage to simulate this contact between two strong at all.
The example that me to treat is a cylinder of diameter 20 , of length 30 mm submitted to a strength of 5000 N and in contact on a plate of 40 x 40 mm, thickness 20 mm.
Is someone able to explain me the step-by-step gait to calculate this contact?

Thank you for your help.

Patrick Chevalier
France

----- La messagerie itinérante sans abonnement NetCourrier -----
Web : www.netcourrier.com     Minitel : 3615 et 3623 NETCOURRIER
                  Tél : 08 36 69 00 21

...
   Hello,

   Where is the problem? In order to understand correctly the problem,
   it is necessary for me to know which kind of analysis program are
   you using to make the calculation and what are the requirements of
   this program related to the contacts.

   Best regards,

pachevalier at netcourrier.com writes:
 > Hello,
 > 
 > I use GiD without difficulties to calculate some mechanical parts. I wish to calculate a contact between a cylinder and a plate thick to study in 3 
 > measurements the pressure of hertz. I don't manage to simulate this contact between two strong at all.
 > The example that me to treat is a cylinder of diameter 20 , of length 30 mm submitted to a strength of 5000 N and in contact on a plate of 40 x 40 mm, thickness 20 mm.
 > Is someone able to explain me the step-by-step gait to calculate this contact?
 > 
 > Thank you for your help.
 > 
 > Patrick Chevalier
 > France
 > 
 > ----- La messagerie itinérante sans abonnement NetCourrier -----
 > Web : www.netcourrier.com     Minitel : 3615 et 3623 NETCOURRIER
 >                   Tél : 08 36 69 00 21
 > 
 > -- 
Centre Internacional de Mètodes             Ramon Ribó 
Numèrics en Enginyeria        	           
                                            ...
I am looking for possible problem type applications which may be available
for use.  I could use a Dyna3d, ansys, nastran, nisa, stardyne, cosmos,
algor, topaz, and an updated tochnog.  Anybody have any problem types they
would like to share?

Brian
acs at itctel.com

    Hello,

    We are developing here at CIMNE several problem types with several
    commercial packages. Nowadays, we have, in an early alpha stage,
    problemtypes for Ansys and for Cosmos-shell. If you are interested
    in them, I can put them in the GiD FTP.

    Best regards,

acs writes:
 > I am looking for possible problem type applications which may be available
 > for use.  I could use a Dyna3d, ansys, nastran, nisa, stardyne, cosmos,
 > algor, topaz, and an updated tochnog.  Anybody have any problem types they
 > would like to share?
 > 
 > Brian
 > acs at itctel.com...
You are a very ambitious man, aren't you?

----- Original Message ----- 
From: acs <acs at itctel.com>
To: <gidlist at gatxan.cimne.upc.es>
Sent: Wednesday, March 22, 2000 5:15 PM
Subject: [ GiDlist ] Re: problem types

> I am looking for possible problem type applications which may be available
> for use.  I could use a Dyna3d, ansys, nastran, nisa, stardyne, cosmos,
> algor, topaz, and an updated tochnog.  Anybody have any problem types they
>...
   Hello,

   Information about GiD licenses is in:   
     http://gid.cimne.upc.es/support/faq-manual_8.html#SEC39

   Now on, it is necessary that you calculate by yourself the faces
   numbers from the elements numbers with an ordering algorithm.

   As the people that needs this kind of information increases, it
   will be necessary to give this kind of data by the normal means of
   the BAS file.

   Best regards,

Antonio M. F. Frasson writes:
 > Would you please can give me two informations ?
 > First : I need to change my system ( processors, main board and hard
 > disk), then I will need to chance my system number. Can I change the
 > number to install the GID in the new system? ( I bought a license in last
 > year ).
 > Second : I need the edge numbers, can I obtain these number of the GID? If
 > these is possible, how?
 > I am working in finite elements for electromagnetics and I am utilizing
 > edge elements, now I am numbering the edges utilizing the nodes numbers,
 > but these transform my final system of equations with a very irregular
 > sparse pattern and the solution implies in a large number of fill ins. If
 > I obtain the edges numbers of GID date structure, I and  others that work
 > with GID in electromagnetics, this is the case of my laboratory in
 > UNICAMP,Brazil, will have our work been facilitate.
 > Thanks,
 > Antonio Manoel F. Frasson  
 > 

-- 
Centre Internacional de Mètodes             Dr. Ramon Ribó 
Numèrics en Enginyeria        	           
                                            ...
Thank you and yes I would be very interested in the ansys and cosmos problem
types.  I would very much like to download these.

Brian
acs at itctel.com

-----Original Message-----
From: ramsan at stamp.cimne.upc.es <ramsan at stamp.cimne.upc.es>
To: gidlist at gatxan.cimne.upc.es <gidlist at gatxan.cimne.upc.es...
   Hello,

   You can get the problemtypes: Ansys55_plane,Ansys55_3D and
   cosmos-shell in:

      ftp://gid.cimne.upc.es/pub/gid_adds/problem_types

   They are in the alpha stage and have no manual and help.

   Only advised for the brave and courageous people.

   Best regards,

acs writes:
 > Thank you and yes I would be very interested in the ansys and cosmos problem
 > types.  I would very much like to download these.
 > 
 > Brian
 > acs at itctel.com
 > 

 -- 
Centre Internacional de Mètodes             Dr. Ramon Ribó 
Numèrics en Enginyeria        	           
                                            ...
I'd like to know if it is possible to view in the postprocess stage structural
diagrams as moment diagrams with GID. If it is not able, I'd like to show element
values, that's to say different values in a node owning to different elements. Is
there any way to do this?

Thank you.
--
José Javier Muñoz Romero
Instituto Eduardo Torroja
c/Serrano Galvache s/n
28033 MADRID
Tel: 91 302 04 40
Fax: 91 302 07 00
jmunoz at ietcc.csic.es

Hello, 

Thank you for your answer. 
I use Gid with tochnog. First, i want to replicate in Gid the example number 17 of the manual user of tochnog. I drew: circle (center 5,5,0 normal 0,0,1 radius 5) and rectangle (line 0,0,0 -> 10,0,0 -> 10,-3,0 -> 0,-3,0 -> 0,0,0). When I select the line of the circle and the supperior line of the rectangle to create a contact of surface and when I push on the key escape, Gid displays the message: 
Created 0 new contact surfaces. Can continue (ESC to leave).
Leaving contact creation.
I have study this example directly with tochnog and I visualize the result with Gid without problem (post processor).
The same message is displayed with the case that I wrote in my first message (volume contact).
This message is displayed in Gid 5.0p47 and Gid 5.0p49b2.
Is there something certainly that I didn't understand in the creation of contacts, but what?

Best regards 

----- Message d'origine ----- 
De : <...
   Hello,

   Contacts in GiD and contacts in tochnog are not the same thing. You
   should ask a tochnog expert in order to learn to create this
   contact for this problem.

pachevalier at netcourrier.com writes:
 > Hello, 
 > 
 > Thank you for your answer. 
 > I use Gid with tochnog. First, i want to replicate in Gid the example number 17 of the manual user of tochnog. I drew: circle (center 5,5,0 normal 0,0,1 radius 5) and rectangle (line 0,0,0 -> 10,0,0 -> 10,-3,0 -> 0,-3,0 -> 0,0,0). When I select the line of the circle and the supperior line of the rectangle to create a contact of surface and when I push on the key escape, Gid displays the message: 
 > Created 0 new contact surfaces. Can continue (ESC to leave).
 > Leaving contact creation.
 > I have study this example directly with tochnog and I visualize the result with Gid without problem (post processor).
 > The same message is displayed with the case that I wrote in my first message (volume contact).
 > This message is displayed in Gid 5.0p47 and Gid 5.0p49b2.
 > Is there something certainly that I didn't understand in the creation of contacts, but what?

-- 
Centre Internacional de Mètodes             Dr. Ramon Ribó 
Numèrics en Enginyeria        	           
                                            ...

    Hello,

    If the elements are 2-noded beams, it is possible to show moments
    over them with the new result 'Line Diagram' and 'Vector
    Diagram'. If someone is interested in them, I can give one example
    of use.

    If they are shell elements, it is possible to use border graphs
    for nodal results. They will draw a curve showing the current
    variable. 

    In any element type, it is possible to enter results in Gauss
    Points. In this case there can be different values for every node
    related to every element.

    To solve better the problem, please give more details.

    Best regards,

 > I'd like to know if it is possible to view in the postprocess stage structural
 > diagrams as moment diagrams with GID. If it is not able, I'd like to show element
 > values, that's to say different values in a node owning to different elements. Is
 > there any way to do this?
 > 
 > Thank you.
 > --
 > José Javier Muñoz Romero
 > Instituto Eduardo Torroja
 > c/Serrano Galvache s/n
 > 28033 MADRID
 > Tel: 91 302 04 40
 > Fax: 91 302 07 00
 > ...
I've searched the 'Line Diagram' and 'Vector Diagram' options but I didn't find it. I
have the 3.5.3 version of GID and I've looked it up in the manuals. Please, could you
send me an example of use.

Thanks.

ramsan at stamp.cimne.upc.es wrote:

>     Hello,
>
>     If the elements are 2-noded beams, it is possible to show moments
>     over them with the new result 'Line Diagram' and 'Vector
>     Diagram'. If someone is interested in them, I can give one example
...
José Javier Muñoz Romero wrote:
> 
> I've searched the 'Line Diagram' and 'Vector Diagram' options but I didn't find it. I
> have the 3.5.3 version of GID and I've looked it up in the manuals. Please, could you
> send me an example of use.
> 
> Thanks.
> 

To use the options 'Line Diagram' and 'Vector Diagram' you should use one of the
beta's versions of GiD (our latest beta version is 49b4). 
These options are some of our latest add-ons to GiD. 
You can find then on 

ftp://gid.cimne.upc.es/pub/gid_adds...
Hi everybody:
I'm trying to represent results in the Gauss-Points of a 3D mesh made 
with quadrilaterals and triangles (mixed). I've been little 
successful with one Gauss point, but it`s impossible with more (for 
me). I want the program to calculate them by itself , but how?.
Does anyboby know something about this?. Thanks, 
hope not to be the only one with this problem. Best regards,
Jose Angel Gonzalez Perez (japerez at cica.es)
Escuela Superior de Ingenieros
Departamento de Estructuras
Avda. de los Descubrimientos, s/n
41092     Sevilla (SPAIN)

...
José Angel González Pérez wrote:
> 
> Hi everybody:
> I'm trying to represent results in the Gauss-Points of a 3D mesh made
> with quadrilaterals and triangles (mixed). I've been little
> successful with one Gauss point, but it`s impossible with more (for
> me). I want the program to calculate them by itself , but how?.
> Does anyboby know something about this?. Thanks,
> hope not to be the only one with this problem. Best regards,

At the moment is not posible to use several number of Gauss Points 
on diferent elements. 
On the beta versions released only Gauss points over the same type of 
element are supported (i.e. you cannot mix 3 gauss points over triangles
and 4 gauss points over cuadrilaterals on the same mesh).

We're working on it now, and it will be finished very soon.
I'll keep you informed.

>...
Hi,

I'm dealing with surfaces of sliders in computer harddrives. I' using GiD
for meshgenerating. The surfaces are three dimensional. when I use the
Write Mesh command, my nodes have Three coordinates, if I use the command

*loop nodes
  *NodesNum *NodesCoord 
*end

in the ".bas" file for the same model Gid writes only the x & y coordinate.
How can I solve this problem.

The differences in the level of two adjacent surfaces are pretty small.
(0.001 mm)
Is there an option that has two be set?
I don't have problems if the surfaces levels are bigger.

Maik Duwensee

Maik Duwensee

____________________________________________

University of California San Diego
Center for Magnetic Recording Research, 0401
9500 Gilman Drive
La Jolla, CA 92093-0401

mail:   ...
maik at talkevax.ucsd.edu wrote:
> 
> Hi,
> 
> I'm dealing with surfaces of sliders in computer harddrives. I' using GiD
> for meshgenerating. The surfaces are three dimensional. when I use the
> Write Mesh command, my nodes have Three coordinates, if I use the command
> 
> *loop nodes
>   *NodesNum *NodesCoord
> *end
> 
> in the ".bas" file for the same model Gid writes only the x & y coordinate.
> How can I solve this problem.
...
thanks for the prompt reply,
unfortunately it doesn't seem to work. I get three coordinates, but the
third one is always zero. I checked with the write mesh option and there
the z values are different from zero. 
what else can I do?

regARDS Maik

At 11:18 AM 5/2/00 +0200, you wrote:
>maik at talkevax.ucsd.edu wrote:
>> 
>> Hi,
>> 
>> I'm dealing with surfaces of sliders in computer harddrives. I' using GiD
>> for meshgenerating. The surfaces are three dimensional. when I use the
...
   Hello,

   In the latest version, the tolerance for the z coordinate is much
   smaller. Get the lattest beta in the 'GiD web page download Beta
   versions' and this problem should be fixed.

   Best regards,

maik at talkevax.ucsd.edu writes:
 > thanks for the prompt reply,
 > unfortunately it doesn't seem to work. I get three coordinates, but the
 > third one is always zero. I checked with the write mesh option and there
 > the z values are different from zero. 
 > what else can I do?
 > 
 > regARDS Maik
 > 
 > 
 > 
 > 
 > At 11:18 AM 5/2/00 +0200, you wrote:
 > >...
hello

I meet problems with cylinders (hole or round) imported since files of iges format. The creation of volume is achieved. At the time of the meshing, there is the message of mistake: error in the meshing of the surface.

To explain the problem, i join a file cylinder.zip to show the problem at the time of the meshing. Files cyl_1.igs, cyl_3.igs, cyl_5.igs, cyl_6.igs work. Files cyl_2.igs and cyl_4.igs don't work at the time of the meshing.

Do you know this problem?

There are the same problem with holes in a part.

Best regards

Patrick Chevalier
France

----- La messagerie itinérante sans abonnement NetCourrier -----
Web : www.netcourrier.com     Minitel : 3615 et 3623 NETCOURRIER
                  Tél : 08 36 69 00 21

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There are some problems in GiD at the time of orienting certain surfaces
correctly (closed, trimmed surfaces with holes, etc.)
In some of these cylinder samples, the function that calculates the normal
fail, and
if the direction is incorrect then the meshing process fails (it does not
known the correct direction of mesh advance).
Therefore, it is not a problem of the IGES reading process, but one of the
"correcting" filters

It is possible to repair a surface manually, by creating another trimmed
from this one, by means of
Geometry -- > Create -- > Nurbs Surface - >Trimmed
The previous surface must be selected, and then select its lines to trim,
with this process possibly  a correct surface is created above the old one.
At the end the bad surface must be deleted.
Note: It is fundamental not to pass the filter (Utilities -- >Repair), since
the new surface would disorient.

In any case for the next beta version of GiD the problem will be already
solved.

...
Hi there !

I am currently testing GiD and I am having two problems to submit.

1. I am trying to perform triangle-meshing of NURBS surfaces. Most of
the time, the mesher doesn't have any difficulties doing its job but for
some particular NURBS surface, it fails, no matter which meshing
parameters I entered. I located the offending NURBS surface and saved it
under a GiD directory named 'PbMesh1.gid'. The directory only contained
1 file 'PbMesh1.geo', which is  attached with this mail. Could you tell
me what's wrong with this surface ? It's a cylinder-shaped NURBS
surface. The only (time-consuming) solution I found was to divide this
surface into two symmetric parts, using a line entity. Is there a
simpler and/or automatic way to 'repair' this kind of surfaces ? Is it
an erroneous CAD surface ? Help !!
I am using GiD on a Windows NT 4.0 platform and it just crashes when the
only surface to mesh is the one given in PbMesh1...

2. I am also using GiD on a Silicon Graphics platform (IRIX, bi-proc).
It works fine, except I have to wait more than two minutes two import an
IGES file that loads in no more than 5 seconds under my desktop PC
(WinNT,128Mb,466Mhz). It seemed to me there was no other big job running
on the Silicon workstation. Is it normal ?

Thanks in advance for your help !

G.

--

Gilles LACROIX                              | mailto: ...

    Hello,

   GiD version 6.0b1. is already in the GiD web page. This is a pre-release
version that has most of the functionality that final version 6 will have. It
only needs a lot of fine tuning and bug fixing. I ask from here to everybody
that can help us, to download this version and to communicate us every found
bug. This will help a lot to obtain a well tested version 6.

On Fri, 16 Jun 2000, you wrote:

> 1. I am trying to perform triangle-meshing of NURBS surfaces. Most of
> the time, the mesher doesn't have any difficulties doing its job but for
> some particular NURBS surface, it fails, no matter which meshing
...
Hi -

Those of you with experience using GiD, Patran, ProEngineer, and/or Catia,
what are some reasons you would want to use one over another?  Can GiD
Professional version really handle all complex problems, or has anyone
encountered limitations with GiD and ended up using some other tool?  

Amy K. Strickert

Antenna & Receiver Technology
> Sanders, A Lockheed Martin Company
> Mail Stop: MER15-1351
> Phone: (603)885-3931
> amy.k.strickert at lmco.com
> 
> 

    Hello,

    As a very subjective opinion totally GiD for, I'll give several arguments
that benefit this program in front of the others:

    -GiD can be configured very easily. A final user can adapt it to
      all his codes and user a common environment for either mechanical, CFD,
      electromagnetic or other analysis types.
    - Although it can have some problems for very complex models as other
       programs do too, it has been proven that with more or less human effort,
       nearly any model can be built. The important concept is to minimize the
       user-time dedicated to prepare the model.
    - His quality/price ratio is really unbeatable.

    Hope these ideas can be useful.

     Regards,

On Fri, 16 Jun 2000, you wrote:
>...
TESTING>>>

Dear GiDians,

I am a novice to GiD for that matter to FEM.

Anyone who could help me in learning it.

I am a student and would like to use this for 3d modelling with
discontinuties.

Any help appreciated....

Regards
Vijay

vijaykumar wrote:
> 
> Dear GiDians,
> 
> I am a novice to GiD for that matter to FEM.
> 
> Anyone who could help me in learning it.
> 
> I am a student and would like to use this for 3d modelling with
> discontinuties.
> 
> Any help appreciated....
> 
> Regards
> Vijay

To start with, there are som tutorials you can download at:

http://gid/download/index.html

Hope it helps

-- 
--------------------------------------------------------------------------------
  Miguel A. de Riera Pasenau    ...
"Miguel A. de Riera Pasenau" wrote:
> 
> vijaykumar wrote:
> >
> > Dear GiDians,
> >
> > I am a novice to GiD for that matter to FEM.
> >
> > Anyone who could help me in learning it.
> >
> > I am a student and would like to use this for 3d modelling with
> > discontinuties.
> >
> > Any help appreciated....
> >
> > Regards
> > Vijay
> 
> To start with, there are som tutorials you can download at:
> 
> ...
I am new to GiD and trying to use it for FEM Electromagnetic analysis, and
have run into a few issues relating between my analysis program and the
preprocessing stage.  If anyone has experience and suggestions for doing the
following, please let me know.

1)  Importing and exporting file formats from other CAD tools, NEUTRAL and
NASTRAN in particular, to do pre- and post-processing in GiD.

2)  Incorporating the analysis into GiD environment by means of a specific
.bat shell script and .exe file in the problem_type directory.   When call
my .bat file from the shell prompt, my analysis program runs just fine, but
GiD crashes on me when I try to run it by means of the "Calculate" menu.
The tutorial on the web page on this is available only in Spanish, which is
quite frustrating.

Thank you,

Amy K. Strickert

Antenna & Receiver Technology
>...

     Hello,

On Thu, 22 Jun 2000, you wrote:
> I am new to GiD and trying to use it for FEM Electromagnetic analysis, and
> have run into a few issues relating between my analysis program and the
> preprocessing stage.  If anyone has experience and suggestions for doing
> the following, please let me know.
>

> 1)  Importing and exporting file formats from other CAD tools, NEUTRAL and
> NASTRAN in particular, to do pre- and post-processing in GiD.
>

    To import geometry:  IGES, VDA, DXF, Parasolid (New version)
    To export geometry:   IGES, DXF (New version)

    To import mesh:    GiD format, NASTRAN format
    To export mesh:     Any problem type that must be created.

>...

Hi !

We have recently purchased Gid 5.0 p47 for WinNT and we are trying to
perform surface meshing (structured mesh with triangular elements) of
imported CAD surfaces (IGES format) with it. Then, we export the
generated mesh in a file (using the 'Write Mesh' command) in order to
have it processed by another program. Doing this, we have two problems :

1. Our program tries to build the normal vectors of each of the triangle
elements but it seems to us that the normal vectors are not oriented in
the same direction, even if the elements originated from the same
initial CAD surface (and this is really a problem for us). We build the
normal vector using the 3 consecutive nodes defining the triangle in the
exported mesh file of GiD. As far as we are concerned, it is the *order*
of the nodes which matters to define the direction of the normal vector.
Does GiD take care of node ordering when writing mesh data ? Is there a
way to correct this ?

2. We have grouped NURBS surfaces in layers before meshing them.
Everything works fine : the triangle elements still belong to different
layers after meshing (the same as their CAD counterparts) but we
couldn't have GiD to write this information in the Mesh file. We were
expecting GiD to add a number (defining the group) at the end of each
line of nodes (as explained in the reference manual) but it doesn't.
What's happening ?

Hope we'll get answers.

Thanks in advance,
Gilles.

-- 
Gilles LACROIX                              | mailto: ...
    Hello to all,

    Next 12th July we prepare a presentation about GiD and the advances in the
new version 6. It is free and will be hold in spanish.

    To obtain more details, please look at:

        ftp://gid.cimne.upc.es/pub/gid_adds/Docs/triptic2.pdf

    Greetings,
-- 
Centre Internacional de Mètodes             Dr. Ramon Ribó 
Numèrics en Enginyeria                   
                                            ramsan at cimne.upc.es 
C/ Gran Capitan s/n,                        
Modulo C1, Campus Norte UPC,                tel. +34 93 401 74 03   
E-08034 Barcelona, Spain                    fax. +34 93 401 65 17

...
LACROIX Gilles wrote:
> 
> Hi !
> 
> We have recently purchased Gid 5.0 p47 for WinNT and we are trying to
> perform surface meshing (structured mesh with triangular elements) of
> imported CAD surfaces (IGES format) with it. Then, we export the
> generated mesh in a file (using the 'Write Mesh' command) in order to
> have it processed by another program. Doing this, we have two problems :
> 
> 1. Our program tries to build the normal vectors of each of the triangle
> elements but it seems to us that the normal vectors are not oriented in
...
Is there any module available to read SAP90/2000 files? I've read
something related to it in the GID+ Web page but I haven't found the
module.

Thanks.

Jose Munoz Romero
Instituto Eduardo Torroja
jmunoz at ietcc.csic.es
Tel +34 91 302 04 40
Fax +34 91 302 07 00

Dr inz TRAN CHI
Technical University of Gdansk
Poland

Hello,

I installed GiD 6.0beta2 windows version. there are two problems that I noticed.

1 - When i choose menu: geometry/edit/divide/surfaces/num_divisions and when i choose a nurbs, i have the message:
problems in nurbs divisions, old surface not delete. Divisions are not complete. The part is a square tube with round and the surface is one of the extremity.
2 - When i choose menu: data/problem_type/tnstress (for tochnog use), the title menu tochnog appears but the the second title of menu disappears and menus baffle themselves toward the right in relation to titles.

These problems don't appear with GiD5.0p49 beta2.

Do you know these problems?

Regards.

Patrick Chevalier.

----- La messagerie itinérante sans abonnement NetCourrier -----
Web : www.netcourrier.com     Minitel : 3615 et 3623 NETCOURRIER
                  Tél : 08 36 69 00 21

...
----- Original Message -----
From: <pachevalier at netcourrier.com>
To: <gidlist at gatxan.cimne.upc.es>
Sent: Monday, July 24, 2000 11:25 AM
Subject: [ GiDlist ] problems with GiD 6.0 beta2
> 1 - When i choose menu: geometry/edit/divide/surfaces/num_divisions and
when i choose a nurbs, i have the message:
> problems in nurbs divisions, old surface not delete. Divisions are not
complete. The part is a square tube with round and the surface is one of the
extremity.

Thanks to inform to us into the error.  There was a failure in the code of
division of surfaces with normal contained exactly in the XY plane. Already
is corrected.

Enrique Escolano

...
pachevalier at netcourrier.com wrote:
> 
> Hello,
> 
> I installed GiD 6.0beta2 windows version. there are two problems that I noticed.
> 
> 1 - When i choose menu: geometry/edit/divide/surfaces/num_divisions and when i choose a nurbs, i have the message:
> problems in nurbs divisions, old surface not delete. Divisions are not complete. The part is a square tube with round and the surface is one of the extremity.

>From this message it seems to me that the surface you tried to divide 
...
I have downloaded GiD 6.0 beta 2. There are any special provisions before
installing it? I am currently running GiD 5.0 p47. Will the new installation
replace the current GiD or I'll keep 2 versions of it (I greatly prefer this
second option)?

Best regards,

Andrea Pablo Assanelli
Senior Research Engineer
CINI/FUDETEC
Buenos Aires
ARGENTINA

ASSANELLI Andrea CINI wrote:
> 
> I have downloaded GiD 6.0 beta 2. There are any special provisions before
> installing it? I am currently running GiD 5.0 p47. Will the new installation
> replace the current GiD or I'll keep 2 versions of it (I greatly prefer this
> second option)?

To keep both version its only necesary to install them in separate directories
and to leave the 'Standard icons bar' on GiD 6.0 beta 2 switched off while quiting GiD
( otherwise GiD 5.0 p47 will not start saying that couldn't open the 'stadard bar').

Hope it helps.

> Best regards,
...
Hello,  

In a previous mail, I spoke of menu shift with tochnog and GiD 6.0 beta2. You gave me an answer with the modification of file tclfile-opengl. This problem is solved as while modifying the file of tochnog (tnstress.tcl) to adapt it to 9 menus instead of 8. Me joined the file to this mail for your information.

Thank you for your attention.  
Patrick Chevalier.

----- La messagerie itinérante sans abonnement NetCourrier -----
Web : www.netcourrier.com     Minitel : 3615 et 3623 NETCOURRIER
                  Tél : 08 36 69 00 21

-------------- next part --------------
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Name: tnstressGiD6.tcl
Url: ...
Hello,  

I wish to know the method to modify measurements of a volume in GiD. I have a cylinder with the following measurements:
first, circle  
center: 0,0,0  
normal: 0,0,1  
radius: 25.4 
second, volume 
lenght: 50 on z (utility/copy/surface/translation=50/extrud surface)  
How to make to pass the length to 60 on z. This to preserve surfaces, the volume, conditions...  

I used: geometry/edit/move point, but lines distort themselves.  

Thank you.

Patrick Chevalier.

----- La messagerie itinérante sans abonnement NetCourrier -----
Web : www.netcourrier.com     Minitel : 3615 et 3623 NETCOURRIER
                  Tél : 08 36 69 00 21

...
pachevalier at netcourrier.com wrote:
> 
> Hello,
> 
> I wish to know the method to modify measurements of a volume in GiD. I have a cylinder with the following measurements:
> first, circle
> center: 0,0,0
> normal: 0,0,1
> radius: 25.4
> second, volume
> lenght: 50 on z (utility/copy/surface/translation=50/extrud surface)
> How to make to pass the length to 60 on z. This to preserve surfaces, the volume, conditions...
> 
> I used: geometry/edit/move point, but lines distort themselves.
...
We have released today a new version of GiD, 6.0, for more details
please look at

http://gid.cimne.upc.es

Hope it helps . . .

best regards

miguel

--------------------------------------------------------------------------------
  Miguel A. de Riera Pasenau    miguel at cimne.upc.es    http://gid.cimne.upc.es

Hi,

How do I take control over the sense of element connectivity written to the calculation file using *EelemsConec?
and,
Is it possible to change that sense to be clockwise or anticlockwise for both 2D and 3D meshes.

Anybody's help will be appreciated.

thanks

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I am using GiD to view results of   two-dimensional shallow water
equations modelling. I use a finite volume method so I have one result
at every mesh element (quadrilaters). Until now I used to interpolate to
the nodes and use GiD to view these results. With the new version I
tried to use the gauss points result option, considering one gauss point
at every element.

According to what's written in 'what's new in version 6.0':
'ContourFill/ContorLines and others will do a local interpolation from
gauss points with internal coordinates to the nodes to draw the
results.', but I cannot manage GiD to do so and my results do not
appear  in a smooth way.

Is there any way to use the Gauss points results option and have the
results automatically smoothed by GiD, so I don't need to do the
interpolation myself?

Ernest Bladé
...
Ernest Bladé i Castellet wrote:
> 
> I am using GiD to view results of   two-dimensional shallow water
> equations modelling. I use a finite volume method so I have one result
> at every mesh element (quadrilaters). Until now I used to interpolate to
> the nodes and use GiD to view these results. With the new version I
> tried to use the gauss points result option, considering one gauss point
> at every element.
> 
> According to what's written in 'what's new in version 6.0':
> 'ContourFill/ContorLines and others will do a local interpolation from
...
I have the following problem,

when using 20 noded brick element, the order of nodes around the element is not consistent neither clockwise nor counterclockwise.

it writes the nodes in the corner first then the middle. therefore, the (swap) option does not work in this case.

Is it possible to change that to be consistent clockwise or counterclockwise order of nodes around the element.

Thank you

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   To write the elements list, 3 options are possible:

      *ElemsConec
      *ElemsConec(swap)
      *ElemsConec(1) *ElemsConec(2) *ElemsConec(3) *ElemsConec(4) ...

      With the last option, you can construct the elements list as you prefer.

     Best regards,

On Fri, 28 Jul 2000, you wrote:
> 
> Hi,
> 
> How do I take control over the sense of element connectivity written to the calculation file using *EelemsConec?
> and,
> Is it possible to change that sense to be clockwise or anticlockwise for both 2D and 3D meshes.
> 
> Anybody's help will be appreciated.
...
-----Original Message-----
From: Ramon Ribó Rodríguez <ramsan at cimne.upc.es>
To: gidlist at gatxan.cimne.upc.es <gidlist at gatxan.cimne.upc.es>
Date: Wednesday, August 02, 2000 9:33 AM
Subject: Re: [ GiDlist ] how to change the sense of element connectivity?

>
>   To write the elements list, 3 options are possible:
>
>      *ElemsConec
>      *ElemsConec(swap)
...
Dear Mr. Meguid,
Please, check the next lines in your .bas file:

1st test
*loop elems
*ElemsNum *elemsconec(1) *elemsconec(2) *elemsconec(3) *ElemsMat
*end elems

2nd test
*loop elems
*ElemsNum *elemsconec(3) *elemsconec(2) *elemsconec(1) *ElemsMat
*end elems

We have tested it for two surfaces with different normal sense (equivalent
to define clockwise) and it works.
If you have any additional problem, you can send your specific GiD files.

Best regards,
J.

-----Original Message-----
From: owner-gid at gatxan.cimne.upc.es
[mailto:owner-gid at gatxan.cimne.upc.es...
Hi, I have generated a GID geometry (*.geo) file with an external program.
The file was correctly loaded by GID (I am running version 5.0 p47 and 6.0
beta 2, professional edition) and I can generate a FE mesh (triangles).
However when I try to cancel the mesh (Meshing->Cancel Mesh) the program
(GID) hangs badly. The same problem happens with both GID versions I
mentioned, but does not happen with other files. I loaded the initial *.geo
file and saved it again (even changing its name) from within GID hoping the
problem was a format problem but it still hangs GID. It also hangs GID when
trying to save the file AFTER generating the FE mesh (but not before). I
attach to this e-mail the *.geo file (as an ascii file) as saved by GID.

Thank you very much,

Andrea Assanelli
Senior Research Engineer
CINI/FUDETEC
Buenos Aires
ARGENTINA

:::::::::::::...
Before generate the mesh or save the problem, try to repair the geometry
(Utilities->Repair).

-----Original Message-----
From: owner-gid at gatxan.cimne.upc.es
[mailto:owner-gid at gatxan.cimne.upc.es]On Behalf Of ASSANELLI Andrea CINI
Sent: Thursday, August 10, 2000 8:33 PM
To: 'gidlist at gatxan.cimne.upc.es'
Subject: [ GiDlist ] Problems with a mesh

Hi, I have generated a GID geometry (*.geo) file with an external program.
The file was correctly loaded by GID (I am running version 5.0 p47 and 6.0
beta 2, professional edition) and I can generate a FE mesh (triangles).
However when I try to cancel the mesh (Meshing->Cancel Mesh) the program
(GID) hangs badly. The same problem happens with both GID versions I
mentioned, but does not happen with other files. I loaded the initial *.geo
file and saved it again (even changing its name) from within GID hoping the
problem was a format problem but it still hangs GID. It also hangs GID when
trying to save the file AFTER generating the FE mesh (but not before). I
attach to this e-mail the *.geo file (as an ascii file) as saved by GID.

Thank you very much,

Andrea Assanelli
Senior Research Engineer
CINI/FUDETEC
Buenos Aires
ARGENTINA

:::::::::::::...
It works OK. Thanks.

-----Mensaje original-----
De: Javier Mora [mailto:mora at cimne.upc.es]
Enviado el: Viernes 11 de Agosto de 2000 05:16
Para: gidlist at gatxan.cimne.upc.es
Asunto: RE: [ GiDlist ] Problems with a mesh

Before generate the mesh or save the problem, try to repair the geometry
(Utilities->Repair).

-----Original Message-----
From: owner-gid at gatxan.cimne.upc.es
[mailto:owner-gid at gatxan.cimne.upc.es...
Hi,

first of all, I didn't receive any mail until now. Is this list in use at all?
If it did, my question as follows: in the user manual is described a function 'planar surface creation', but I can't find that in 'geometrie->create' pull down. I need release 6.0 and the 
corresponding user manual.
Thanks.

Sebastian

sebastian at skatulla.com

In the recent versions of the GID I used to create a planner surface as
follow:

(geometry-create-nurbsurface) to create a planner surface. You can also use
the automatic feature of this option for 4 or more sided planes.

Hope this may help

M. A. Meguid
UWO, Canada

-----Original Message-----
From: Sebastian Skatulla <sebastian at skatulla.com>
To: gidlist <gidlist at gatxan.cimne.upc.es>
Date: Monday, August 21, 2000 7:50 PM
Subject: [ GiDlist ] geometrie creation

>Hi,
>...
> Hope this may help

It did, thanks.

Sebastian

Release 6.0 is available for download at CIMNE's web site (7726 Kb), check
the address above. I think you will find some directions about the manuals
there (I'm not sure).

Best regards,

Andrea Assanelli
Senior Research Engineer
CINI/FUDETEC
Buenos Aires
ARGENTINA

>
>We have released today a new version of GiD, 6.0, for more details
>please look at
>
>http://gid.cimne.upc.es
>
>Hope it helps . . .
>
>best regards
>
>miguel
> 

----------------------------------------------------------------------------
----
  Miguel A. de Riera Pasenau    ...
> Release 6.0 is available for download at CIMNE's web site (7726 Kb), check
> the address above. I think you will find some directions about the manuals
> there (I'm not sure).

I downloaded the newest manual as I got release 6.0. But the manual seems to be
newer than the program :-)

Sebastian

You can find the last manual version in the download page of GiD:
Search first the link "Download GiD user manual, reference manual and
examples" and then "GiD reference manual ( 2nd August 2000)", that I think
is correlated with the release 6.0, isn't it?
Javier

> -----Original Message-----
> From: owner-gid at gatxan.cimne.upc.es
> [mailto:owner-gid at gatxan.cimne.upc.es]On Behalf Of Sebastian Skatulla
> Sent: Tuesday, August 22, 2000 5:38 PM
> To: ...
>You can find the last manual version in the download page of GiD:
>Search first the link "Download GiD user manual, reference manual and
>examples" and then "GiD reference manual ( 2nd August 2000)", that I think
>is correlated with the release 6.0, isn't it?

Function 'geometry->create->plannar_surface' doesn't exists. But someone told me that the function 'NURBS_surface' does the same and that's right - I tried it!

Sebastian

sebastian at skatulla.com

Hi,

another question, can GID create a load vector, i.e. in the *.cnd file I
define a load condition as follows:

...
condtype: over lines
condmeshtype: over nodes
question: x1
value: 1.0 kN/m
question: x2
value: 0.0 kN/m
...

then I assign to one boundary line (l = 1m) of a rectangle this  line
load . Does each of this 5 node of the boundary line after meshing get
0.25 kN(inner nodes) / 0.125 (outer nodes)? Or simply 1.0 kN/m? It seem
to be the last one.

Sebastian

    Hello,

    It is possible to define condition values that change depending on the x,y
and z coordinates. It would be the typical case for applying a triangular or
parabolic load to a boundary of the model.

   To do so, check the type of field #FUNC# in the problem type conditions
help.

    About the planar surfaces, they are being completely substituted by the
NURBS surfaces. It is better to use these.

    Best regards,

On Tue, 22 Aug 2000, you wrote:
> Hi,
> 
> another question, can GID create a load vector, i.e. in the *.cnd file I
> define a load condition as follows:
>...
On Tue, 22 Aug 2000, Sebastian Skatulla wrote:

> Hi,
> 
> another question, can GID create a load vector, i.e. in the *.cnd file I
> define a load condition as follows:
> 
> ...
> condtype: over lines
> condmeshtype: over nodes
> question: x1
> value: 1.0 kN/m
> question: x2
> value: 0.0 kN/m
> ...
> 
> then I assign to one boundary line (l = 1m) of a rectangle this  line
> load . Does each of this 5 node of the boundary line after meshing get
> 0.25 kN(inner nodes) / 0.125 (outer nodes)? Or simply 1.0 kN/m? It seem
...
For structural analysis, it could be very useful to take a look to the
configuration files of calsef (www.cimne.upc.es/calsef), the GiD+ module for
this kind of simulations.

> -----Original Message-----
> From: owner-gid at gatxan.cimne.upc.es
> [mailto:owner-gid at gatxan.cimne.upc.es]On Behalf Of Mohamed Abdalla
> Abdel-Meguid
> Sent: Tuesday, August 22, 2000 6:24 PM
> To: gidlist at gatxan.cimne.upc.es...
After first installation, I have message as following;

     SwapBuffers failed !

And program killed itself.

If anyone know about solving this problem, please let me know.
thanks

Minho Kwon

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   Hello,

   This can be a problem with the graphics acceleration card. GiD version 6 has
an option, in the Windows start menu, called GiD safe, that permmits to
disconnect the graphics card. You can try it.

   Best regards,

On Wed, 30 Aug 2000, you wrote:
> 
> After first installation, I have message as following;
> 
>      SwapBuffers failed !
> 
> And program killed itself.
> 
> If anyone know about solving this problem, please let me know.
> thanks
> 
> Minho Kwon
> 
> 

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-- 
Centre Internacional de Mètodes             Dr. Ramon Ribó 
Numèrics en Enginyeria                   
...
Hi, I am using GiD (v5.0 p47) as a pre-processor for an in-house FE program.
I am modelling a 2D problem in which 2 bodies are expected to get in contact
during the analysis, but are intially separated or with interference
(overlapping). The two bodies are defined as planar surfaces bounded by
lines, polylines and arcs.

I can create correctly the surfaces and its meshes. However, when I want to
create contact surfaces (using Geometry->Create->Contact->Surface) the
contact surfaces are not created: after selecting a series of lines I obtain
the message "Created 0 new contact surfaces. Can continue (ESC to leave)".
What I really need is the list of nodes for the lines that I will define as
my contact surfaces, ordered by pairs (target-contactor). I will have
tipically 25/30 contact pairs (target-contactor) per analysis, and I would
prefer to generate this information automatically, and not going to the
specfied surfaces AFTER the meshing and listing the nodes. Is this possible?

Thank you very much,

Andrea Assanelli
Senior Research Engineer
CINI/FUDETEC
Buenos Aires
ARGENTINA

...
    Hello,

    To create a 2D contact the process is:

     - Create one side lines and put them in one layer.
     - Set another layer as active
     - Create another line that exactly duplicates the first one. Points must
        be also duplicated (Typically using copy with translation 0 and with
        flag 'Duplicate entities' activated).
     - Set another layer as active
     - Create a contact surface selection the two lines or more at the same
        time (if using copy, it has the option 'Create contacts').
     - Several element types can be generated in the contact (degenerated
        elements):
             * 2-noded elements (by defalult).
             * No elements (useful to force the same mesh in both sides)
             * Quadrilateral elements
     - Layer in this process have only been set for viewing and selecting
        purposes. In fact, they are not necessary. 

     If 2-noded elements are meshed, later it is easy in the .bas file to list
them by pairs.

     Hope it helps,

On Tue, 05 Sep 2000, you wrote:
>...
The procedure works OK, however I have to define contact between 2 surfaces
wich are originally separated (hence they cannot "exactly duplicate each
other"). Moreover the surfaces are not equal... A typical example would be
the contact between a sphere and a flat surface (in 2D), which are initially
separated, and will get in contact during the analysis, but the region of
contact is a function of the analysis itself (as in a Hertzian contact). One
surface would be a line (side) of the block, and the other an arc of the
sphere.

Again, thank you very much,

Andrea Assanelli
Senior Research Engineer
CINI/FUDETEC
Buenos Aires
ARGENTINA

-----Mensaje original-----
De: Ramon Ribó Rodríguez [mailto:...
I am doing some numerical modelling that involves excavation process and
looking for any way that could allow removing some elements
(the excavated ones) after running the solver, so that  the postprocessor
will only plot the final mesh after excavation.

Anybody's help is appreciated

M. A. Meguid

I am doing some numerical modeling that involves excavation process and
looking for any way that could allow removing some elements
(the excavated ones) after running the solver, so that  the postprocessor
will only plot the final mesh after excavation.

Anybody's help is appreciated

M. A. Meguid

----- Original Message ----- 
From: "M. A.Meguid" <maabdel at engga.uwo.ca>
To: <gidlist at gatxan.cimne.upc.es>
Sent: Tuesday, September 12, 2000 11:04 AM
Subject: Re: [ GiDlist ] Excavation

>...
"M. A.Meguid" wrote:
> 
> I am doing some numerical modeling that involves excavation process and
> looking for any way that could allow removing some elements
> (the excavated ones) after running the solver, so that  the postprocessor
> will only plot the final mesh after excavation.
> 
> Anybody's help is appreciated
> 
> M. A. Meguid
> 

Can you elaborate on this?

There are several tools to remove elements, at preprocess level 
"Meshing->Edit Mesh->Delete elements" and at postprocess you can
divide the mesh, . . .

-- 
--------------------------------------------------------------------------------
  Miguel A. de Riera Pasenau    ...
Thank you sir for your concern.
I am talking about the post process,(i.e. after running the solver)
I have to do the analysis first with the complete mesh defined and defining
the elements to be removed in the pre-process stage. which is straight
forward

The problem now with the post-process stage where I need to take the
excavated elements off the mesh before plotting the results.

Regards

All I need is some tool that re
----- Original Message -----
From: "Miguel A. de Riera Pasenau" <miguel at cimne.upc.es>
To: <gidlist at gatxan.cimne.upc.es...
"M. A. Meguid" wrote:
> 
> Thank you sir for your concern.
> I am talking about the post process,(i.e. after running the solver)
> I have to do the analysis first with the complete mesh defined and defining
> the elements to be removed in the pre-process stage. which is straight
> forward
> 
> The problem now with the post-process stage where I need to take the
> excavated elements off the mesh before plotting the results.
> 
> Regards
> 
> All I need is some tool that re
                                 ^^^^- seems to be cut

The only tool in postprocess to remove elements is to divide the mesh:
entering a plane conservate the elements at one side of the plane.

You can also delete meshes/sets individually.

hope it helps.

best redagrs 
miguel

-- 
--------------------------------------------------------------------------------
  Miguel A. de Riera Pasenau    ...
I am currently in the process of evaluating GID as a preprocessor for viscous
 flow cfd problems.

I would like to concentrate elements along walls to pick up boundary layer flow
 and in GID I would like to concentrate elements along both
ends at the same time.  Is this possible?

Regards,

Mark Moeckel
Caterpillar Inc.
Engine Research
Peoria, Illinois USA

   Hello,

   In 2D problems, it can be done easily by creating an offset of the geometry,
and meshing structured inside. In 3D it is possible to do the same with
hexahedra. With tetras, there is not an easy way to do so.

   Best regards,

On Mon, 18 Sep 2000, you wrote:
> I am currently in the process of evaluating GID as a preprocessor for viscous
>  flow cfd problems.
> 
> I would like to concentrate elements along walls to pick up boundary layer flow
>  and in GID I would like to concentrate elements along both
> ends at the same time.  Is this possible?
> 
...
Hello,

I read that GID support gauss points in the postprozessing step, but not in the preprozessing step. My solver needs the gauss points metric of a surface to calculate a deformation 
analysis. Therefore it was fine, if GID would also generate the gauss points metric. But it seems that GID didn't do this, or?
Another problem I have is as follows: I calculate a deformation of a rotation symmetric cylinder. Therefore I have to calculate only a quarter of the cylinder and the output my solver 
generate is the deformation of quarter cylinder. So I must copy using GID with the mirror option the quarter two times getting the result of the whole cylinder. But each copy produce 
a separate material number in the mesh file, so that I have 4 material numbers instead of 1 I need.
Thanks for help!

...
Sebastian Skatulla wrote:
> 
> Hello,
> 
> I read that GID support gauss points in the postprozessing step, but not in the preprozessing step. My solver needs the gauss points metric of a surface to calculate a deformation
> analysis. Therefore it was fine, if GID would also generate the gauss points metric. But it seems that GID didn't 
do this, or?

I think, not.

> Another problem I have is as follows: I calculate a deformation of a rotation symmetric cylinder. Therefore I have to calculate only a quarter of the cylinder and the output my solver
> generate is the deformation of quarter cylinder. So I must copy using GID with the mirror option the quarter two times getting the result of the whole cylinder. But each copy produce
...
Because there were some problems with messages that
exceded the limit of 40000 characters, this limit
has been raised.

Sorry for the incoveniences.
Thanks for your patience.

Majordomo

Hello,  

In Gid 6.1.1, when i want to divide a nurbs surface, the 2 axes are designated by u whereas they should be designated by u and v. Do you have a correction for this problem?  

Thank you.  

Patrick Chevalier.

----- La messagerie itinérante sans abonnement NetCourrier -----
Web : www.netcourrier.com     Minitel : 3615 et 3623 NETCOURRIER
                  Tél : 08 36 69 00 21

pachevalier at netcourrier.com wrote:
> 
> Hello,
> 
> In Gid 6.1.1, when i want to divide a nurbs surface, the 2 axes are designated by u whereas they should be designated by u and v. Do you have a correction for this problem?
> 

There are really an 'u' and a 'v' but the look almost the same.
For a better distinction we will change the colors for the 'u' and 'v' axis,
and try another font types.

-- 
--------------------------------------------------------------------------------
  Miguel A. de Riera Pasenau    ...
Hello,

My purpose is to use the "read surface mesh" option and transfert MESH
format into IGES format in order to compare
finite element geometry after distorsions with real geometry.

But I cannot create an IGES file from surface mesh data. In fact when I
read a surface mesh,
the mesh is well converted in points, lines and surfaces geometry entities,
but I can export it immediately in IGES format.
When I try, the IGES file is empty. The solution I have found (todate) is
to delete all the surfaces and create again all the surfaces, but in this
case
the complexity of the geometry (about 15000 surfaces) leads to many holes
on the surface, then it is impossible to generate
the volume (solid).

Do you have another solution to bypass this problem, thank you very much in
advance for your help.

Charles Aliaga.

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intended solely for the use of the individual or entity to whom they
are addressed. If you have received this email in error please notify
the system manager.
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...

   Hello,

   The entity 'surface mesh' is thought to generate mesh on it. As you have
seen, it cannot be exported into IGES. Is it not useful for you to create the
solid inside GiD and work on it? Maybe, the comparation between both
geometrical shapes can be made inside GiD. 

   Also, it is necessary to note that the meshing of 'surface meshes' can be
problematic for complex geometries.

   Best regards,

On Mon, 16 Oct 2000, you wrote:
> Hello,
> 
> My purpose is to use the "read surface mesh" option and transfert MESH
> format into IGES format in order to compare
>...
hello

thank you for this message, infact I have send you another one this
afternoon:

copy of second mail:
*************************************************
Hello,

It is not possible for me to create the solid inside Gid, because the solid
is the result of finite
element calcultation with large strain. But Gid is usefull to convert the
mesh discetization into
geometric definition and my objectif is to convert it into an IGES file.
For the moment I have succeeded in converting the file (mesh) into points
or points-lines IGES entities,
but nerver into surface entities. In effect I cannot export the IGES
surface model.

My GOAL rests:

 purpose:      MESH  --------> READ MESH and convert into an IGS
points-lines-surfaces ------------> Compare with SOLID

tool :         F.E simulation tool ---------> GID ---------> Solid 3D
system.
*******************************************************
I have a another question for you:

I am surpised to see that ascii format contain all the
points-lines-surfaces geometry, why IGES is empty ?

thank you again for your help.

Charles Aliaga.

**********************************************************************
 This email and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they
are addressed. If you have received this email in error please notify
the system manager.
**********************************************************************

...
When a mesh is read  through "Read Surface Mesf", some "pseudo-surfaces" are
built inside GiD , in those which actually underlies the mesh. They are
thought for remeshing on them or to obtain a volume mesh.
There is not in IGES an analogous entity to this SurfMesh, therefore is not
written in the exported file. A possible solution for this case is to create
a surface for each element, and to export them as IGES (the number of
surfaces can be huge).

To make this the mesh can be read as such ("Mesh Read"), and to write it as
if they would be surfaces in DXF format  (with the attached interface
DXFout,created with didactic end), and after read this DXF file in GiD and
to export it as IGES.

To prove it, must:
1) Decompress the directory DXFout.gid in the problemtypes subdirectory.
2) Open GiD and choose in the menu Data ->Problem type ->DXFout.
3) Read the mesh in the menu Files ->Import/Export ->Mesh Read.
4) Write the DXF file  (Files ->Import/Export ->Write Calculation File)
5) Import this file: (Files ->Import/Export ->DXF Read)
6) Export the IGES file : (Files ->Import/Export ->IGES Write)

I hope this will help you. If you have any trouble with this process,
please, send us an e-mail (including the mesh yu are trying to work with).

Best regards.

Enrique Escolano
CIMNE

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Thank you, the patch works very well, I have just some errors in  reading
the IGES file, maybe due to incompatibility between
CAO tools.

Best regards

Charles ALIAGA

When a mesh is read  through "Read Surface Mesf", some "pseudo-surfaces"
are
built inside GiD , in those which actually underlies the mesh. They are
thought for remeshing on them or to obtain a volume mesh.
There is not in IGES an analogous entity to this SurfMesh, therefore is not
written in the exported file. A possible solution for this case is to
create
a surface for each element, and to export them as IGES (the number of
surfaces can be huge).

To make this the mesh can be read as such ("Mesh Read"), and to write it as
if they would be surfaces in DXF format  (with the attached interface
DXFout,created with didactic end), and after read this DXF file in GiD and
to export it as IGES.

To prove it, must:
1) Decompress the directory DXFout.gid in the problemtypes subdirectory.
2) Open GiD and choose in the menu Data ->Problem type ->DXFout.
3) Read the mesh in the menu Files ->Import/Export ->Mesh Read.
4) Write the DXF file  (Files ->Import/Export ->Write Calculation File)
5) Import this file: (Files ->Import/Export ->DXF Read)
6) Export the IGES file : (Files ->Import/Export ->IGES Write)

I hope this will help you. If you have any trouble with this process,
please, send us an e-mail (including the mesh yu are trying to work with).

Best regards.

Enrique Escolano
CIMNE

**********************************************************************
 This email and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they
are addressed. If you have received this email in error please notify
the system manager.
**********************************************************************

...
Dear GID users and developers

During my little experience working with GID and using it in solving several 2D and 3D problems, I noticed that there are problems with the preprocessor writing the element connectivity for a complex geometry in a consistent manner.

As far as I understand, The element connectivity order can be controlled by using the following statement in the .bas file 
*elemsConec(1)*elemsConec(2)*elemsConec(3)*elemsConec(4)... etc

The following have been observed:

using the same .bas file for two different 3D meshes, the first one is a simple geometry consists of one single volume and the second is a complex geometry
consists of several volumes. It was observed that the same .bas file works well for the simple geometry and writes the exact element order as in the .bas file.
However, it produces inconsistent order of element connectivity for the more complex geometry, where, part of the mesh is being written in a correct manner and the rest of the elements are not.

This problem has been repeated several times for different problem configurations and I had to write the elements connectivity by hand !

Hope this is not a bug in the program. 

If you have explanation or suggestion for this problem please email me.

Regards

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The 3D elements, in general, can be located in any
position and direction of the space.  The program can only guarantee
the local numeration.  In the case of 20 nodes hexaedron  the local
numeration is the following one:

That is to say, the face (1-2-3-4), following its numeration defines a
normal pointing at the face (5-6-7-8), but this normal does
not have to point at the axis +Y or any other axis.  In fact,
in general the sides of the element do not have to be parallel
to the X,Y or Z axis.

In your case, if the analysis requires that the face (1-2-3-4) point to the axis +Y, 
you can check in the file *.bas  wich of the 6 faces points approximately at this direction, writing the numeration consequently.

(simple calculus can be make in the file *.bas with the *operation command , which will be necessary to carry out the vectorial and scalar products required)

Note:  In the 2D case, to help the user, GiD orients the elements with the normal pointing towards the axis +Z.

I hope that your doubts have been solved.  Kindly.

Enrique Escolano

----- Original Message ----- 
  From: M. A.Meguid 
  To: ...
Thank you sir for your response

I understand that the normal to the face does not have to point in the +Y direction. But, the point is the "consistency". why some elements are being generated counting the nodes clockwise and some are counterclockwise. And why it worked for the single volume and did not work for the multi-volume mesh.

Also If there is consistency, the connectivity writing will be much easier to control in the .bas file. Some solvers require that the 20 noded element must be written in a certain direction in order to define the correct shape function at the proper node. This does not apply to the 8 noded brick element (for example) because the 8 shape functions are the same. 

This is the case with my solver. It requires that the element connectivity being numbered in a consistent manner in the counterclockwise direction and apparently the preprocessor can not do that for a complex geometries.

I would appreciate your help if you could  elaborate on the  *operation command and how is it going to work in order to make the .bas file writes the connectivity for all the elements in a consistent manner counting in one face (x-z for example) and going perpendicular.

Thanks 
  ----- Original Message ----- 
  From: Enrique Escolano 
  To: ...
In 3D elements it does not have sense to speak of clockwise orientation.

The first face of the elements is located randomly (depending on the way that has been created the geometry, etc).  GiD cannot guarantee where this face points, only guarantees that this first face (nodes 1-2-3-4) points inside of the element.

In your simple example, the direction is correct by chance (if the piece is rotated 180º,  the orientation swaps).

If your solver requires the face pointing +y considered as the first, you can reorganize, in the file *, bas, the way in which these connectivities are written, as it is mentioned in the previous message.

For example, it is checked which of the faces points to +Y vector
If the following 6 faces are considered (pointing inside the element):
face 1:  1-2-3-4
face 2:  8-7-6-5
face 3:  1-5-6-2
face 4:  3-7-8-4
face 5:  2-6-7-3
face 6:  1-4-8-5

1) Look for the unit normal of each face with a vectorial product of its 3 first ABC nodes:
                            Normal=AB^BC / |ab^bc|
2) Verify if the scalar product with the +Y vector (0,1,0) is approximately 1 (> 0,99 actually)

Once is known if one of the 6 faces points the wished direction, write the connectivities, rearranging the numbers as if is considered this the first face of the element

The file * bas would become of the following way:
(Is Attached final-1.bas with the mentioned changes)

*loop elems
*set var CARAY(int)=0
*if(CARAY==0)
*#cara1: 1-2-3-4
*set var ABX(real)=Operation(NodesCoord(2,1,real)-NodesCoord(1,1,real))
*set var ABY(real)=Operation(NodesCoord(2,2,real)-NodesCoord(1,2,real))
*set var ABZ(real)=Operation(NodesCoord(2,3,real)-NodesCoord(1,3,real))
*set var BCX(real)=Operation(NodesCoord(3,1,real)-NodesCoord(2,1,real))
*set var BCY(real)=Operation(NodesCoord(3,2,real)-NodesCoord(2,2,real))
*set var BCZ(real)=Operation(NodesCoord(3,3,real)-NodesCoord(2,3,real))
*set var PVX(real)=Operation(ABY*BCZ-ABZ*BCY)
*set var PVY(real)=Operation(ABZ*BCX-ABX*BCZ)
*set var PVZ(real)=Operation(ABX*BCY-ABY*BCX)
*set var MODULO(real)=Operation(sqrt(PVX*PVX+PVY*PVY+PVZ*PVZ))
*set var CANGLEY=Operation(PVX/MODULO)
*if(CANGLEY(real)>0.99)
*set var CARAY=1
*endif
*endif
*if(CARAY==0)
*#cara2: 8-7-6-5
*set var ABX(real)=Operation(NodesCoord(7,1,real)-NodesCoord(8,1,real))
*set var ABY(real)=Operation(NodesCoord(7,2,real)-NodesCoord(8,2,real))
*set var ABZ(real)=Operation(NodesCoord(7,3,real)-NodesCoord(8,3,real))
*set var BCX(real)=Operation(NodesCoord(6,1,real)-NodesCoord(7,1,real))
*set var BCY(real)=Operation(NodesCoord(6,2,real)-NodesCoord(7,2,real))
*set var BCZ(real)=Operation(NodesCoord(6,3,real)-NodesCoord(7,3,real))
*set var PVX(real)=Operation(ABY*BCZ-ABZ*BCY)
*set var PVY(real)=Operation(ABZ*BCX-ABX*BCZ)
*set var PVZ(real)=Operation(ABX*BCY-ABY*BCX)
*set var MODULO(real)=Operation(sqrt(PVX*PVX+PVY*PVY+PVZ*PVZ))
*set var CANGLEY=Operation(PVX/MODULO)
*if(CANGLEY(real)>0.99)
*set var CARAY=2
*endif
*endif
*if(CARAY==0)
*#cara3: 1-5-6-2
*set var ABX(real)=Operation(NodesCoord(5,1,real)-NodesCoord(1,1,real))
*set var ABY(real)=Operation(NodesCoord(5,2,real)-NodesCoord(1,2,real))
*set var ABZ(real)=Operation(NodesCoord(5,3,real)-NodesCoord(1,3,real))
*set var BCX(real)=Operation(NodesCoord(6,1,real)-NodesCoord(5,1,real))
*set var BCY(real)=Operation(NodesCoord(6,2,real)-NodesCoord(5,2,real))
*set var BCZ(real)=Operation(NodesCoord(6,3,real)-NodesCoord(5,3,real))
*set var PVX(real)=Operation(ABY*BCZ-ABZ*BCY)
*set var PVY(real)=Operation(ABZ*BCX-ABX*BCZ)
*set var PVZ(real)=Operation(ABX*BCY-ABY*BCX)
*set var MODULO(real)=Operation(sqrt(PVX*PVX+PVY*PVY+PVZ*PVZ))
*set var CANGLEY=Operation(PVX/MODULO)
*if(CANGLEY(real)>0.99)
*set var CARAY=3
*endif
*endif
*if(CARAY==0)
*#cara4: 3-7-8-4
*set var ABX(real)=Operation(NodesCoord(7,1,real)-NodesCoord(3,1,real))
*set var ABY(real)=Operation(NodesCoord(7,2,real)-NodesCoord(3,2,real))
*set var ABZ(real)=Operation(NodesCoord(7,3,real)-NodesCoord(3,3,real))
*set var BCX(real)=Operation(NodesCoord(8,1,real)-NodesCoord(7,1,real))
*set var BCY(real)=Operation(NodesCoord(8,2,real)-NodesCoord(7,2,real))
*set var BCZ(real)=Operation(NodesCoord(8,3,real)-NodesCoord(7,3,real))
*set var PVX(real)=Operation(ABY*BCZ-ABZ*BCY)
*set var PVY(real)=Operation(ABZ*BCX-ABX*BCZ)
*set var PVZ(real)=Operation(ABX*BCY-ABY*BCX)
*set var MODULO(real)=Operation(sqrt(PVX*PVX+PVY*PVY+PVZ*PVZ))
*set var CANGLEY=Operation(PVX/MODULO)
*if(CANGLEY(real)>0.99)
*set var CARAY=4
*endif
*endif
*if(CARAY==0)
*#cara5: 2-6-7-3
*set var ABX(real)=Operation(NodesCoord(6,1,real)-NodesCoord(2,1,real))
*set var ABY(real)=Operation(NodesCoord(6,2,real)-NodesCoord(2,2,real))
*set var ABZ(real)=Operation(NodesCoord(6,3,real)-NodesCoord(2,3,real))
*set var BCX(real)=Operation(NodesCoord(7,1,real)-NodesCoord(6,1,real))
*set var BCY(real)=Operation(NodesCoord(7,2,real)-NodesCoord(6,2,real))
*set var BCZ(real)=Operation(NodesCoord(7,3,real)-NodesCoord(6,3,real))
*set var PVX(real)=Operation(ABY*BCZ-ABZ*BCY)
*set var PVY(real)=Operation(ABZ*BCX-ABX*BCZ)
*set var PVZ(real)=Operation(ABX*BCY-ABY*BCX)
*set var MODULO(real)=Operation(sqrt(PVX*PVX+PVY*PVY+PVZ*PVZ))
*set var CANGLEY=Operation(PVX/MODULO)
*if(CANGLEY(real)>0.99)
*set var CARAY=5
*endif
*endif
*if(CARAY==0)
*#cara6: 1-4-8-5
*set var ABX(real)=Operation(NodesCoord(4,1,real)-NodesCoord(1,1,real))
*set var ABY(real)=Operation(NodesCoord(4,2,real)-NodesCoord(1,2,real))
*set var ABZ(real)=Operation(NodesCoord(4,3,real)-NodesCoord(1,3,real))
*set var BCX(real)=Operation(NodesCoord(8,1,real)-NodesCoord(4,1,real))
*set var BCY(real)=Operation(NodesCoord(8,2,real)-NodesCoord(4,2,real))
*set var BCZ(real)=Operation(NodesCoord(8,3,real)-NodesCoord(4,3,real))
*set var PVX(real)=Operation(ABY*BCZ-ABZ*BCY)
*set var PVY(real)=Operation(ABZ*BCX-ABX*BCZ)
*set var PVZ(real)=Operation(ABX*BCY-ABY*BCX)
*set var MODULO(real)=Operation(sqrt(PVX*PVX+PVY*PVY+PVZ*PVZ))
*set var CANGLEY=Operation(PVX/MODULO)
*if(CANGLEY(real)>0.99)
*set var CARAY=5
*endif
*endif
*if(CARAY==1)
 *elemsConec(1) *elemsConec(9) *elemsConec(2) *elemsConec(10) *elemsConec(3) *
 *elemsConec(11) *elemsConec(4) *elemsConec(12) *elemsConec(13) *elemsConec(14)*
 *elemsConec(15) *elemsConec(16) *elemsConec(5) *elemsConec(17) *elemsConec(6)*
 *elemsConec(18) *elemsConec(7) *elemsConec(19) *elemsConec(8) *elemsConec(20)
*elseif(CARAY==2)
 *elemsConec(20) *elemsConec(8) *elemsConec(19) *elemsConec(7) *elemsConec(18) *
 *elemsConec(6) *elemsConec(17) *elemsConec(5) *elemsConec(16) *elemsConec(15)*
 *elemsConec(14) *elemsConec(13) *elemsConec(12) *elemsConec(4) *elemsConec(11)*
 *elemsConec(3) *elemsConec(10) *elemsConec(2) *elemsConec(9) *elemsConec(1)
*elseif(CARAY==3)
  ... face=*CARAY
*elseif(CARAY==4)
  ... face=*CARAY
*elseif(CARAY==5)
  ... face=*CARAY
*elseif(CARAY==6)
  ... face=*CARAY
*else
  Not exist face pointing to +y axis
*endif
*set var CARAY(int)=0
*end elems
*endif
*if(ndime==2)
*#----- 8-node quadrilateral Y +ve upward ----------
*if(gendata(2,int)==8)
*loop elems
*elemsConec(4)*elemsConec(7)*elemsConec(3)*elemsConec(6)*elemsConec(2)*
*elemsConec(5)*elemsConec(1)*elemsConec(8)
*end elems

NOTE:  the connectivities are written according to your numeration, different from the one of GiD:

As you can check, this solution works but it is slow and annoying. The best option is integrate this algorithm inside your calculations code.

  ----- Original Message ----- 
  From: M. A. Meguid 
  To: ...
Dear Mr. Escolano

First of all, I would like to thank you for your help and assistance. It is really appreciated
Second, I tried this way of defining the face that is point to the +Y axis as you advised and it worked after little modification. But, I would like to further minimize the probability of the starting point in that face which could be one of the four corner points. 

Is there any additional condition that could be added to define the starting point to be at the left lower corner of the face (for example, point 1 if face 1-5-6-2 pointing in +Y "GID numeration").

This condition is important for the solver to work properly.

Thank you again for your cooperation

  ----- Original Message ----- 
  From: Enrique Escolano 
  To: ...
Please, send us a sample attached that it shows the problem.

Includes the gid files and the problem type files enclosing a brief explanation of where it fails.

if it prefers it can send it to my private direction.
escolano at cimne.upc.es

Thanks to inform to us.

Enrique Escolano (Gid developper)

  ----- Original Message ----- 
  From: M. A.Meguid 
  To: gidlist at gatxan.cimne.upc.es 
  Sent: Thursday, October 26, 2000 4:50 PM
  Subject: [ GiDlist ] preprocessor bug

  Dear GID users and developers

  During my little experience working with GID and using it in solving several 2D and 3D problems, I noticed that there are problems with the preprocessor writing the element connectivity for a complex geometry in a consistent manner.

  As far as I understand, The element connectivity order can be controlled by using the following statement in the .bas file 
  *elemsConec(1)*elemsConec(2)*elemsConec(3)*elemsConec(4)... etc

  The following have been observed:

  using the same .bas file for two different 3D meshes, the first one is a simple geometry consists of one single volume and the second is a complex geometry
  consists of several volumes. It was observed that the same .bas file works well for the simple geometry and writes the exact element order as in the .bas file.
  However, it produces inconsistent order of element connectivity for the more complex geometry, where, part of the mesh is being written in a correct manner and the rest of the elements are not.

  This problem has been repeated several times for different problem configurations and I had to write the elements connectivity by hand !

  Hope this is not a bug in the program. 

  If you have explanation or suggestion for this problem please email me.

  Regards

-------------- next part --------------
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I would like to know how can I introduce comments or
explanations in a batch file. Thank you.

_______________________________________________________________
Do You Yahoo!?
Consiga gratis su dirección @yahoo.es en http://correo.yahoo.es

   Hello,

   you can use:

geometry create line
1,2
*****COMMENTS hello world!!!
2,3
escape

More options

*****PRINT  Print a message in the inferrior GiD messages line
*****PRINT1 Print a message with a window

   Best regards,

On Mon, 27 Nov 2000, you wrote:
> I would like to know how can I introduce comments or
> explanations in a batch file. Thank you.

-- 
Centre Internacional de Mètodes             Dr. Ramon Ribó 
Numèrics en Enginyeria                   
http://gid.cimne.upc.es/ramsan              ramsan at cimne.upc.es...
Hi all,

I have recently started evaluating GiD, and am rather impressed, so far.

I am performing rather complex CFD work - with a 2d mesh consisting of 1
NURBS surface, consisting of an exterior closed boundary, with 750
enclosed closed boundaries.

Is someone able to provide advice on suitable selection of meshing
parameters, in order to both optimise meshing time, but to also give
reasoably optimal meshes.

Is there a way to say separate a complicated mesh into separate
"surfaces", and mesh each in its own optimal way? Will the mesher ensure
grid continuity between these surfaces?

Any tips & advice in this area would be welcomed...

Are any papers avalable beyond those in the excellent tutorials?

-- 
Best regards,

Des Aubery...
_________________________
                         ^^^^^    --->
East London               ^^^^^    --->    Advanced Automotive...
E.Cape, 5257               ^^^^^    --->    Heat-Transfer
South Africa                ^^^^^    --->    CFD
email: ...
I would like to know how to create a computational box that has a center of
0 0 0.

What does LPB mean?

I am trying to put a sail into the box and make it a hole?

Brad

   Hello,

   To obtain meshes that describes correctly the geometry with a minimum of
elements it is possible to use: 
      Meshing->Assing unstr. sizes->By cordal error
   To change the meshing size transitions, change the factor:
      Utilities->Preferences->Meshing->Unstruc. size transitions
   To assign meshing sizes to part of the geometry use:
      Meshing->Assign unstruct. sizes

   Documents on GiD are basically:

     GiD User Manual
     GiD Reference Manual
     Tutorials
     Some examples of 'problemtypes' included with the GiD installation.

  To be able to help you in the surfaces item, I would need a more detailed
information.

   Best regards, 

On Sat, 02 Dec 2000, you wrote:
>...
   Hello,

   To create a box you can do it "manually" by using:
       Geometry->Create->Line...     or
       Geometry->Create->Object->Prism

   If it is something that must be repeated every time, as it seems to be your
case, it is better to implement a simple procedure in TCL-TK to make it
automatically. Several 'problemtypes', specially related to CFD, have already
done it to create the control box.

   If your are going to perform an analysis on a sail, be very careful in the
sense that it has a thickness close to zero. It can give several meshing
problems to have a volume with a hole that has a 'volume' of zero.

   Previus analysis made with GiD on sails use the following approach:

    Sail is discretized with a double surface that has as boundary the same set
of lines. It means that the closed boundary of the two surfaces is the same and
the two surfaces have the same geometric representation but are two different
entities. One of them represent the windward and the other represent the
heeward. To do so, there can be used the following options:
         Utilities->Copy   ( a 0,0,0 translation with option 'duplicate
entities' unset)
         Utilities->Collapse->Lines (and select the boundary lines).

 Then, the control volume is divided into two volumes by adding additional
surfaces. In this way, the hole of zero thickness is avoided. If there are two
sails, the aproach is the same having two doubled surfaces and 3 control
volumes. 

    GiD version 6 has implemented and special option that permits to have a
unique control volume around a zero thickness hole (that would be the sail). To
use it, create the hole with the same doubled surfaces aproach than before and
create the volume with a hole. After this, do:
    -Geometry->Create->Contact volume (select the 2 double surfaces).
    -Meshing->Mesh criteria->No mesh->Volumes (and select the created contact
volume).

    Hope it helps,

On Thu, 07 Dec 2000, you wrote:
>...
Hello !

Just one and maybe stupid question:

Is there a solution of combining thermo and fluid simulation
(caltep+shyne) ?

Greetings from here

Sven 'anderssehn' Eweleit

PS in long term i like to get also the sun as one heat source, weather
data
     and moisture involved (whole year every hour!).
                                     So maybe someone else have done
this before ?
--
anderssehn GmbH i.G.
Sven 'anderssehn' Eweleit                      Tel 0511 8092311
Seilerstr. 16                            dringend  0179 6008550
D - 30171 Hannover                          Fax +49 511 9886370

http://www.anderssehn.de...
There is a program called TDYN (developed in CIMNE) that allows to solve
transient coupled Heat Transfer and Fluid Dynamics problems for
incompressible flows.
It also can solve Heat Transfer problems in solids but not mixed solid and
fluid problems.
This program is available in Windows, Linux and (Sillicon Graphics) Unix and
is fully integrated with GiD.
Unfortunatelly the program is not comercially available, since the manual is
now being written and some industrial validation is being carried out.

Best Regards,

Julio García

_________________________________________________
Dr. Julio García Espinosa
Centro Internacional de Métodos Numéricos en Ingeniería
International Center for Numericas Methods in Engineering
Tlf. + 93 401 6038
Tlf. + 93 401 7797
Fax. +93 401 65 17
email: ...
Hi

I am new to GID. 

How can I get a mesh with quadratic elements on a surface to 
display with the midnodes in the correct position. The mesh looks 
faceted. ie all the elements look flat

Best regards

Bob Adey
Dr Robert Adey
Computational Mechanics BEASY
Ashurst Lodge, Ashurst,
Southampton, SO40 7AA, UK.
Tel:  +44 (0) 238 029 3223
Fax:  +44 (0) 238 029 2853
http://www.beasy.com

See BEASY on the www.  www.beasy.com

Well I have tried to get the unique volume around a hole that has zero
thickness. 

What happens now is the meshing nears the end and the cpu usage is 100%
constant and the disk is chugging away. The machine runs out of virtual
memory. Is generating a mesh of the type discussed below too much for a
machine with Windows 2000 800 Mhz with 128 Meg Ram ?

Here are the steps:

1. Created a box with NURBS surfaces
2. Imported the DXF of the sail
3. Placed it inside the box
4. Simplified the Sail to points describing the panels
5. drew lines between the points.
6. Created new nurbs surfaces
7. Copied the surfaces translate, 0,0,0 no duplication of entities
8. Created contact volume for each panel (10 in all)
9. Created the control volume from box surfaces
10. Created a hole from the contact volumes in the control volume
11. Set no mesh to the contact volumes
12. Set up the problem like the third tutorial sample in the PDF
13. Generated mesh and it goes until the GID crashes from Windows adjusting
virtual memory.

Any thoughts would be appreciated.

TIA

Brad Odland
Odland Sails

-----Original Message-----
From: Ramon Ribó Rodríguez [mailto:...
Hola !

Just for Your program improvement:
each calculation of the shyne examples are finishing with:
Free memory not possible.....
Working in the preproz. without saving afterward is ending with a GID-crash...
Also on a machine with Windows 2k 700 Mhz with 500 MB Ram

And there are also some other failures ..... But by now I think it is the user
who might be the bug. And that's ;-) in this case .   So

Greetings from here

sven eweleit

PS by the way how can I get asses to TDYN (developed in CIMNE)?
I am just evaluating/beta testing for the next tree months. So anything would be
nice.

"Odland, Bradly A." wrote:

> .... the cpu usage is 100%
...
Hello,

In the fourth example of the new version of Shyne tutorial (see
http://www.cimne.upc.es/shyne/manual) there is an example of sail analysis.
You
will be able to discover the methodology for the creation of the geometric
model, mesh and some images for the visualization of the more interesting
result of this analysis.

Best regards,

Centre Internacional de Mètodes          Lara Pellegrini
Numèrics en Enginyeria
lara at cimne.upc.es
C/ Gran Capitan s/n,
Modulo C1, despC6, Campus Norte UPC,   tel. +34 93 401 60 38
E-08034 Barcelona, Spain                            fax. +34 93 401 65 17

----- Original Message -----
From: Ramon Ribó Rodríguez <...
     Hello,

    The display of the elements looks like if they were simple linear but, in
reality, the midnodes are over the originating geometrical entities. This is
just a rendering issue, necessary for efficiency.

   Best regards,

On Tue, 12 Dec 2000, you wrote:
> Hi
> 
> I am new to GID. 
> 
> How can I get a mesh with quadratic elements on a surface to 
> display with the midnodes in the correct position. The mesh looks 
> faceted. ie all the elements look flat
> 
> Best regards
> 
> Bob Adey
> Dr Robert Adey
...
I?m Spanish so sorry about my English.

Is it possible to do a frecuency analisys of a simple 3D structure 
generated from truss and beams ????

Is it possible to obtain the frecuencies and modes of vibration of the 
structure ???

Thank you very much if you answer this question.

EN ESPANOL:

Es posible realizar el calculo de los modos y frecuencias de vibracion, 
aunque sea una estructura muy simple de 3 dimensiones formada por barras y 
vigas, con GiD ???

Muchas gracias por vuestras respuestas.

Un saludo

   Hello,

   GiD is just a pre-postprocessing system. It can deal with any type of 
analysis if you have the correct calculations module.

   If you are thinking on GiD+, there is not, in this moment, any program 
inside this library that can perform dynamic analysis.

   Best regards and merry christmas to everybody in the list!!

On Thursday 21 December 2000 12:18, you wrote:
> I?m Spanish so sorry about my English.
>
> Is it possible to do a frecuency analisys of a simple 3D structure
> generated from truss and beams ????
>
> Is it possible to obtain the frecuencies and modes of vibration of the
...

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