Optistruct solver stuck at progress 13% for hours

Pradhyuman Shekhawat

Hello everyone, 

 

I am performing a transient dynamics analysis on a rocket structure. There are no errors when I run the analysis but the analysis stays at 11 - 13 % every time I run it. 

If you know, could you tell me the possible reasons for that?

 

I am attaching a screenshot with this query.

It stays like this for hours.

 

Thanks

Adriano_Koga

how did you steup your TSTEP card? and what are the results that you're requesting?

What is your model size? (# of elements and nodes)

Can you share your .out file?

 

Transient analysis is very time consuming, indeed. Specially if you're requesting a small timestep, and also requesting too many responses.

Another thing, Direct transient analysis is the most expensive one, in general.

 

Have you tried Modal Transient? It might speed-up a little bit your analysis, in most of the cases.