strange error in topology optimization 1

[dkakth]

Hello colleagues

I have setup a topo opt with stress level for a constrain (attached the *.cae)
analisys goes well , but the optimization run fails with a strange error

YOU ARE MIXING OP=NEW AND OP=MOD FOR *CLOAD

why this happens, since i have turned off the BC propagation option

thanks and kind regards

/d

 

[FEA way]

It works fine in newer version (2017) so this is probably caused by some limitation of Abaqus 6.14. You may have to use different approach to account for load cases in this older release. Or switch to approach with 2 steps instead of load cases.

Your goal is to minimize volume while keeping the maximum stress from two load cases below given level, right ?

 

[dkakth]

yes Sir, that was my goal

...i realised it works fine if i use different steps, but having the loads from a single step as load cases is more computational friendly, i guess...

anyway, thanks for the effort

 

[dkakth]

Sir, can i find you on Linkedin to connect and give endoursement there for the effords ?