How to restart the dynamic analysis in optistruct?
Dear Optistruct user,
Could someone explain me how can I restart modal frequency response analysis from normal modal analysis in Optistruct?
Many Thanks in advance
Shiva
Answers
-
There's not exactly a Restart in this case.
But, you can use the EIGSAVE and EIGRETRIVE commands to store the modal results for a second run.
Model #1
run modal analysis and request EIGSAVE >> it saves the eigenresults into a external file.
Model #2
create a FRF model, and request EIGRETRIEVE >> it will use the previously saved result and skip the modal analysis, thus speed-up the FRF run.
0 -
Hi Adriano, Thank you for your answer. I have an extended question on random analysis. Is the same approach works for running random analysis from frequency response results (random just statistical calculations and I used to do only within Patran by using FRF results)!? With this I just want to avoid running FRF analysis repeatedly during random iterations. Many thanks in advance for your time ShivaAdriano A. Koga_21884 said:There's not exactly a Restart in this case.
But, you can use the EIGSAVE and EIGRETRIVE commands to store the modal results for a second run.
Model #1
run modal analysis and request EIGSAVE >> it saves the eigenresults into a external file.
Model #2
create a FRF model, and request EIGRETRIEVE >> it will use the previously saved result and skip the modal analysis, thus speed-up the FRF run.
0 -
Hi Adriano, Thank you for your answer. I have an extended question on random analysis. Is the same approach works for running random analysis from frequency response results (random just statistical calculations and I used to do only within Patran by using FRF results)!? With this I just want to avoid running FRF analysis repeatedly during random iterations. Many thanks in advance for your time Shiva
Random analysis can be restarted from a previous FRF analysis in newer versions, by using ASSIGN card.
0
Altair Employee