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Let's consider this case.

Once running a simulation (0 ~ 10 seconds) with RecurDyn, you review the results.

After that, you may want to see the results between 10 seconds and 15 seconds.

If it is a model that does not take a long time to simulate, it is fine.

But if it is a model that takes a long time to simulate, you would be reluctant to start the simulation from 0 seconds again, since you already have the results from 0 to 10 seconds.

You may wonder if there is a way to run the simulation starting from 10 seconds.

RecurDyn provides a way to start the ne w simulation from the end time of the previous simulation using the icf file.

After the simulation is complete in RecurDyn, a file called '*.icf' is generated in the folder where the result files are saved.

You can use this file.

If you specify the icf file name in the dialog box below and run the simulation, it starts from the time saved in the icf (usually, the end time of the previous simulation).

For example, if the previous simulation was performed from 0 to 10 seconds, the new simulation starts from 10 seconds.

At this time, if you set the end time to 5s, the simulation starts at 10 seconds and ends at 15 seconds. (The result file is displayed as 0s-5s, but it actually means 10s-15s.)

1. Settings related to the use of an icf file

1. Initial Condition File

After checking the option, specify the full path of the icf file.

2. Initial Condition (Time)

This is the starting time of the new simulation. In other words, this means the simulation time when the *.icf file was created. When the icf file path is specified, this is automatically set.

3. Set Expression Time Offset Automatically

If this option is checked, the Initial Condition (Time) is used as 'Time Offset'.

2. Settings related to the icf file creation

4. Create on End Time (*.icf)
If this option is enabled, an icf file is created at the end of the simulation. (or when the simulation is stopped by the user)

5. Create on Report Step

• All
  Creates an icf file for every reporting step.
  Numerous files can be created.
  Files are stored in a folder named '_ISF_(output file name)'.
• Most Recent
  Creates an icf file for every reporting step, but it is overwritten.
  Only 1 file is created.
  The file name is '(output file name)_REPORTSTEP.icf'.

6. Create on Solving Step
Creates an icf file for every solving step, not the reporting step, but it is overwritten.
Only 1 file is created.
The file name is '((output file name)_SOLVINGSTEP.icf

* reporting step: This step is determined by the end time and steps in the analysis dialog box. The simulation results are written at every reporting step.

* solving step: This step is determined by the solver for calculation. Note that the results for all solving steps are not written to the result files such as rplt, rad.

3. Regenerate Result Files

After running a simulation with the icf file, you may obtain several result files. (previous result files and new ones)

For example, two files could be created as follows:
1. Simulation result for the first 0-10 seconds: Model-1st.rplt
2. Simulation result for 10~15 seconds using icf file: Model-2nd.rplt

However, you may want to see the results from 0 to 15 seconds at a glance with one file.

RecurDyn provides a utility called Regenerate Result Files for such cases, which merges 2 files into one result file.

<Installation Path>\Bin\Utility\RegenerateResultFiles.exe

In the Regenerate Result Files dialog box, specify Model-1 for 'Search Front Outputs' and Model-2 for 'Search Back Outputs'and the Output Folder.

After that, click the Run button to generate the merged result files.