Eigenvalue critical load

[BrianInglis]

I do apologise in advance if this is a stupid question.

I have designed a portal frame then used the analysis Buckle and the eigensolver Lanczos.

This has worked fine and i now have over a hundred eigenvalue results.

I've looked at the manual and this states that the critical load = the preload pattern + eigenvalue*perturbation load.

This however does clarify what eigenvalue i should use to determine the critical load.

As i said i'm probably missing the obvious but if you know the answer could you please humour me.

Any help would be much appreciated.

 

[ESPcomposites]

Try this:

http://www.eng-tips.com/viewthread.cfm?qid=295870&page=2

Brian

http://www.espcomposites.com

 

[BrianInglis]

Think i'm on the right track now.

Cheers for the reply.