[GiDlist] Rotation in GiD

[Shriram]

Hello,



I have been trying to rotate a 2D axisymmetric shape to form a solid. For
e.g. simply rotate a square to get a cylinder in post-process. I can't seem
to accomplish that with the "rotate" option. It works well in pre-process. I
do an axisymmetric analysis so is it possible to do the same in
post-process?



I get weird plots when I try to rotate by specifying two points for an axis.



Thanks,

Shriram



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[miguel]

Yes,

It should work with the 'Utilities--Copy' window.

You can select if it's only for viewing ('View') or you need actually to
create the mesh ('Create').

With the 'Create' option you tell GiD:

* just to rotate the mesh the specified number of degrees and the specified
number of times, or

* do also an extrusion of the mesh by connecting the separated rotated
meshes.



i think that what you are looking for is the last option.

If there is a problem, can you provide us with a little example so that we
can reproduce it?



best regards,



Miguel Pasenau





De: gidlist-bounces at listas.cimne.upc.edu
[mailto:gidlist-bounces at listas.cimne.upc.edu] En nombre de Shriram
Enviado el: lunes, 01 de noviembre de 2010 14:01
Para: gidlist at listas.cimne.upc.edu
Asunto: [GiDlist] Rotation in GiD



Hello,



I have been trying to rotate a 2D axisymmetric shape to form a solid. For
e.g. simply rotate a square to get a cylinder in post-process. I can't seem
to accomplish that with the "rotate" option. It works well in pre-process. I
do an axisymmetric analysis so is it possible to do the same in
post-process?



I get weird plots when I try to rotate by specifying two points for an axis.



Thanks,

Shriram



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[escolano]

Hello Shriram,

As Miguel explained, you can do it in postprocess also, but there are some differences that I remmark:

In postprocess open the copy tool: Utilities-Copy...

Do you have two options: 'View' and 'Create',
You need to use the 'Create' one if do you want to create also extruded elements ('View' is a lighter option that not create any mesh in memory, and apply them results, only draw applying matrix transformations)

Select 'Create' and 'Extrude surface'

and select 'Rotation' and two points of the rotation axe

Be carueful for the angle, if you set 360 degrees, you will obtain o copy of the source in the same location of the original, with opposite normal !!

Take into account that in postprocess you only have mesh entities, not geometric entities: do you need to create multiple 'linear' elements to approximate the curved object.
You can set for example 36 degrees and 10 copies

Another difference with the preprocess copy tool is that user is not asked for a selection of entities, current visible sets are implicitly selected.

Regards

Enrique Escolano
----- Original Message -----
From: Miguel A. Pasenau de Riera
To: gidlist at listas.cimne.upc.edu
Sent: Wednesday, November 03, 2010 1:11 PM
Subject: Re: [GiDlist] Rotation in GiD


Yes,

It should work with the 'Utilities--Copy' window.

You can select if it's only for viewing ('View') or you need actually to create the mesh ('Create').

With the 'Create' option you tell GiD:

* just to rotate the mesh the specified number of degrees and the specified number of times, or

* do also an extrusion of the mesh by connecting the separated rotated meshes.



i think that what you are looking for is the last option.

If there is a problem, can you provide us with a little example so that we can reproduce it?



best regards,



Miguel Pasenau





De: gidlist-bounces at listas.cimne.upc.edu [mailto:gidlist-bounces at listas.cimne.upc.edu] En nombre de Shriram
Enviado el: lunes, 01 de noviembre de 2010 14:01
Para: gidlist at listas.cimne.upc.edu
Asunto: [GiDlist] Rotation in GiD



Hello,



I have been trying to rotate a 2D axisymmetric shape to form a solid. For e.g. simply rotate a square to get a cylinder in post-process. I can't seem to accomplish that with the "rotate" option. It works well in pre-process. I do an axisymmetric analysis so is it possible to do the same in post-process?



I get weird plots when I try to rotate by specifying two points for an axis.



Thanks,

Shriram





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