Length of buckling

[RSAvis]

I try to test the function of analysis of buckling. Length of buckling in two direction y and z seem not correct. Please help me if I am wrong.

Many thanks.

[Artur.Kosakowski]

Please check:

http://forums.autodesk.com/t5/Autodesk-Robot-Structural/Results-Buckling/m-p/3406121

and

http://forums.autodesk.com/t5/Autodesk-Robot-Structural/Buckling-Analysis/m-p/3280269

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[RSAvis]

Thank Artur.

Normally in my case, Lcry = Lcrz = 0.7Lo=5x0.7=3.5m but the result of RSA is very different???

[Artur.Kosakowski]

Have you divided the bar as described in the link I inserted in my previous answer? 

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[RSAvis]

Thank you Arthur very much!!!

But the length of buckling Lcry=11.6m why it is not 3.5m like Lcrz=3.5m?

[Artur.Kosakowski · Accepted solution]

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[RSAvis]

It mean that Lcrz is buckling length of weak axis with accordant Ncr of column. For the strong axis, need Lcry (more longer) to get this Ncr. Thus, in conclution the Lcrz is the buckling length of clolumn and Lcry is referent length

[Artur.Kosakowski · Accepted solution]

You need to match the results with the appropriate shapes of buckling.

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.