Tdyn solver can be comfortably started through PREPOST Calculate menu. Once the analysed problem is defined (i.e. the geometry is created) the boundary conditions assigned, and the mesh is generated, the Start button in the Calculate menu (or the Calculate icon) can be pressed (as shown in Figure 5).
When the Start button is pressed, the system writes the input file for the calculation module (the ‘calculation file’) called ProblemName.flavia into the ProblemName.gid directory, and then the tdyn?d.bat file from the Tdyn problemtype directory is executed, with the following arguments:
Argument 1: Problem name
Argument 2: Problem directory
Argument 3: Problemtype directory
From within the tdyn?d.bat batch file, the program executable tdyn?d.exe is called, with the name of the input file given as an argument.
Now tdyn?d.exe is started and creates a number of output files, among them:
File name |
Description |
ProblemName.flavia.res |
Results file |
ProblemName.flavia.war |
‘Output View’ file |
ProblemName.flavia.for |
Forces file |
ProblemName.flavia.rst |
Restart file |
ProblemName.flavia.tim |
Time table |
ProblemName.flavia.sat |
Sink & Trim data |
ProblemName.flavia.ram.res |
Forces results for structural analysis using Ram-Series |
ProblemName.flavia.ram.msh |
Mesh for structural analysis using Ram-Series |
ProblemName.flavia.err |
Error message (file created only if Tdyn exits with an error) |
Remarks:
Also note that each calculation will delete a previous results file that might exist in this directory, unless it has been renamed before the new calculation process has been started.
This file is updated each time-step that the results are written into the results file (ProblemName.flavia.res). Thus even a process that has not yet terminated can be killed and restarted with the option Restart: On , without having to recalculate all the time steps from the beginning. By killing the process, only the time steps from the last step that has been written into the results file onwards will be ‘lost’ and will have to be recalculated in case of a restart.
Note that the restart file will be written in any case - even in the case that a calculation is started with the Restart: Off option.
Also note that each time the restart file is updated, as well as with each new calculation, a restart file that might already exist in the problem directory will be deleted unless it has previously been renamed.