Starting a simulation using a Restart File Starting a simulation using a Restart File Starting a simulation using a Restart File
In Lesson 7, the WriteRestart button in the Input generator on the Control page was activated. This implies that during the calculation of this example, a restart file (*.rst) has been generated. In the fol-lowing, the second drawing process step will be prepared for a sep-arate simulation.
As the first step, the results of Lesson 7 have to be read in. There are two ways of doing this:
• Open *.sim file or
• Open *.rst file.
Proceed as follows. Open the *.sim file:
File > Open ... > in_lesson_07.sim > OK
The information from both files in_lesson_07.sim and
in_lesson_07.rst are loaded. Therefore, the results of the first draw-ing step can be viewed while prepardraw-ing the new simulation for the second step.
After opening the sim files the results of the first drawing step are shown. In order to define the input for the second drawing step, the Input generator should be opened with the command:
Model > Input generator ...
Open the *.rst File:
File > Open restart ... > in_lesson_07.rst > OK
Only the information from file in_lesson_07.rst is loaded into the Input generator. The results are not visible. In this case, the Input generator opens automatically. No results are seen on the main screen.
The Input generator The Input generator The Input generator The Input generator
After opening both files, all information about the first drawing step are available in the Input generator, independently from opening either the *.sim or *.rst files. In contrast to a standard simulation the Title page has also been changed (Fig. 8.2).
Lesson 8: Multiple Step Process and Starting from Restart File Lesson 8: Multiple Step Process and Starting from Restart File Lesson 8: Multiple Step Process and Starting from Restart File Lesson 8: Multiple Step Process and Starting from Restart File
Fig. 8.2 Fig. 8.2 Fig. 8.2 Fig. 8.2
Title TitleTitle
Title page in the Input generator after opening a *.rst file
The upper half of the Title page is as before. In the lower half, there is the necessary information to define a subsequent simulation in a separate calculation.
• Job info: Contains general information about the first sim-ulation (date, user, hostname, jobname, directory).
• Restart times: These are all process steps and time steps written to the *.rst file. In Lesson 7, the end of each process step was saved to the restart file. Hence in Fig. 8.2 it can be seen that time steps 0, 500, and 600 are shown correspond-ing to the process steps gravity, closcorrespond-ing and drawcorrespond-ing. Thus a new simulation can be created after each time step.
For this the button Make restart (next to the desired time step) has to be clicked. All the restart options for this example will be
explained below. After this, you may continue with the section titled Start of the current example from sim file.
Lesson 8: Multiple Step Process and Starting from Restart File Lesson 8: Multiple Step Process and Starting from Restart File Lesson 8: Multiple Step Process and Starting from Restart File Lesson 8: Multiple Step Process and Starting from Restart File
Make restart after gravity process stepMake restart after gravity process step Make restart after gravity process step Make restart after gravity process step
If you wish to define a new simulation and just use the previous gravity results, press the button
Make restart
Make restart after the process step gravity Make restart after the process step gravity Make restart after the process step gravity Make restart after the process step gravity
Now a new *.sim File named in_lesson_07_r1.sim will be created.
In addition a new subpage (Rst1) opens. You can switch between both subpages (Rst1 and Base) on the Title page (Fig. 8.3).
Fig. 8.3 Fig. 8.3 Fig. 8.3 Fig. 8.3
Detail of the TitleTitleTitleTitle page after pressing the Make restartMake restartMake restart button – Make restart switching between both Input generators is possible
In the new Input generator all information used in the gravity pro-cess step are grayed out (cannot be changed) (Fig. 8.4 – 8.8).
Fig. 8.4 Fig. 8.4 Fig. 8.4 Fig. 8.4
Detail ToolToolToolTool page for the new simulation, only the die can be modi-fied.
Lesson 8: Multiple Step Process and Starting from Restart File Lesson 8: Multiple Step Process and Starting from Restart File Lesson 8: Multiple Step Process and Starting from Restart File Lesson 8: Multiple Step Process and Starting from Restart File
Fig. 8.5 Fig. 8.5 Fig. 8.5 Fig. 8.5
Blank BlankBlank
Blank page of the new simulation – the blank cannot be modified
Fig. 8.6 Fig. 8.6 Fig. 8.6 Fig. 8.6
Lube LubeLube
Lube page of the new simulation
Lesson 8: Multiple Step Process and Starting from Restart File Lesson 8: Multiple Step Process and Starting from Restart File Lesson 8: Multiple Step Process and Starting from Restart File Lesson 8: Multiple Step Process and Starting from Restart File
The friction can only be modified with respect to the die. If a Con-stant friction had been selected instead of Table, friction cannot be modified.Fig. 8.7 Fig. 8.7 Fig. 8.7 Fig. 8.7
Detail of the ProcessProcessProcessProcess page for the new simulation – process steps closing
closing closing
closing and drawingdrawingdrawingdrawing can be changed.
Fig. 8.8 Fig. 8.8 Fig. 8.8 Fig. 8.8
Detail of the ControlControlControlControl page of the new simulation – both Binder wrapBinder wrapBinder wrap Binder wrap and Bending effectsBending effectsBending effects cannot be modified any more. Bending effects
Saving of data File > Save
In case you would like to define another simulation for a different time step you have to read in the base simulation in_lesson_07.sim or in_lesson_07.rst.