topic Re: Instability issues in Robot Structural Analysis Forum

Instability issues

Anonymous — Fri, 26 Apr 2013 12:35:43 GMT

Can you please help me? I am quite new in modelling in Autodesk Robot. Trying to make a verification example for a plate, and I don't understand the instability issue.

A link to file:

https://www.wetransfer.com/downloads/65feb8cecc54e2ef1cbd9df5b3700b1020130426123318/2d6599

Thank you!

Re: Instability issues

Rafacascudo — Fri, 26 Apr 2013 12:40:14 GMT

http://forums.autodesk.com/t5/forums/searchpage/tab/message?location=forum-board%3A351&q=instability&filter=labels%2Clocation

Re: Instability issues

Rafal.Gaweda — Mon, 29 Apr 2013 08:49:32 GMT

It is caused by robot FE type. It is better no to "support" panel in only one node - artifical mathematical instability may appear.

Workaround: add one rigid link as shown below: