Problem with MPCs in optimization

Altair Forum User

Hello!

 

When I run an optimization problem with Minimizing weighted compliance subject to volume fraction constraints I get this message and then it runs.

 

When I change objective to minimize mass subject to stress constraints I get this message and then it crashes after iteration 0.

 

The last output message is:

 

'OptiStruct error termination report printed to file
 '5150_More_DVs_MM.stat'.'

 

I am trying to find the reason for termination in this file but I cannot see what went wrong. Could someone please help me with this? I have attached the stat file that the solver refers to.

Unable to find an attachment - read this blog

tinh

I think you should move elems that bind to MPC into non-design space

 

Altair Forum User

Ok, I will try, thank you!