| Start time |
Starting solution time. Not used by the Arc-Length method.
|
| Restart |
Click this check box to restart from the last successful solution step. Available only if restart data exist with option Save data for restarting the analysis activated in the previous run.
You can change any load parameters (Time curve dialog box) when restarting the analysis.
You can change fixture conditions from free to fixed degrees of freedom and vice versa when activating the Restart option. For example, to change a fixture condition from fixed to free when restarting the analysis:
-
Under Translations (Fixture PropertyManager), type 1 in the direction which you apply the fixture.
- Under Variation with Time, select Curve and click Edit. In the Time curve dialog box, enter the curve data:
| X (Time, sec) |
Y Value |
Fixture condition |
|---|
| 0 |
0 |
fixed |
| 1 |
1.e8 (restart) |
change from fixed to free |
| 2 |
1.e8 |
free |
To change a fixture condition from free to fixed when restarting the analysis:
- Under Translations, type 1 in the direction which you apply the fixture.
- Under Variation with Time, select Curve and click Edit. In the Time curve dialog box, enter the curve data:
| X (Time, sec) |
Y Value |
Fixture condition |
|---|
| 0 |
1.e8 |
free |
| 1 |
0 (restart) |
change from free to fixed |
| 2 |
0 |
fixed |
During the first run (remember to select Save data for restarting the analysis for the first run ( Start time = 0 < t < End time = 1 sec) the solver ignores this fixture and the selected entity where the fixture is applied is free to move. Activating the Restart option and rerunning the analysis (Start time = 1 sec < t < End time = 2 sec) , the solver applies the fixture
and the selected entity is restrained from moving in the specified direction.
|
| End time |
Ending solution time. Not used by the Arc-Length method.
|
| Save data for restarting the analysis |
Check this flag before running the study for possible restart. The software takes some time and disk space to save the data required for a proper restart. If you clear this check box, you have to start from the beginning.
Remeshing the study deletes all restart information.
|
| Time increment |
Sets the procedure for incrementing time at each solution step for the Force and Displacement control methods. For the Arc-Length control method, the program uses this value to estimate an arc-length increment.
|
Automatic (autostepping)
|
When checked, the program determines an increment internally for each solution step to improve chances of convergence. This option supports all control techniques. If the flag is checked, the following entries are used:
|
Initial time increment
|
The program uses this increment as the initial guess for the time increment.
|
|
Min
|
Minimum time step. The default is 1e-8 seconds.
For nonlinear dynamic studies only, if the specified minimum increment is equal or greater than the initial time increment, the program resets the minimum time step to 10% of the initial time increment.
|
|
Max
|
Maximum time step. Default is the End time for the Force and Displacement control methods.
For nonlinear dynamic studies only, the specified maximum time step is not used. The program resets the maximum value to the initial time increment.
|
|
No. of Adjustments
|
Maximum number of time step adjustments for each solution step.
|
|
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Fixed
|
Fixed time step increment. Default is to run 10 steps.
|
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