topic Re: Non-linear analysis no convergence in Robot Structural Analysis Forum

Non-linear analysis no convergence

Anonymous — Fri, 06 Mar 2020 15:38:50 GMT

Hi,

I am trying to do a non-linear analysis of a structure such as the one in the attached image. There are bar elements attached to shell elements by rigid links.

When performing the analysis, no convergence is reached. I have only changed the section to elasto-plastic of those bar elements which utilization ratios from the elastic analysis were over 1.

I have set a small load increment, increased tolerances for residual loads, and increased the number of iterations to 100 but nothing seems to work.

I am not sure if this is due to very high loads or due to a modelling problem. I would be very grateful if you could give me some tips.

Kind regards,

Ana

Re: Non-linear analysis no convergence

paul.bassLH — Fri, 06 Mar 2020 15:52:13 GMT

Hi,

You can try again with this box and tell us if it is better ??

regards

Re: Non-linear analysis no convergence

Anonymous — Fri, 06 Mar 2020 15:54:49 GMT

https://forums.autodesk.com/t5/robot-structural-analysis-forum/non-linear-analysis-involving-model-with-rigid-links/m-p/5791851

See if this discussion of artur can help. Otherwise, check first the strength of your members.