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Sorry für die Englische Erklärung.. Aber mann könnte mich auch auf Deutsch beantworten. Vielen Dank im Voraus.

While trying to define a non-linear Buckling analysis in Patran (SOL 106) it adds the following line in the bdf file "PARAM BUCKLE=2" which seems to be making a pure non-linear analysis in order to find a perturbation factor followed by a cold start and a regular linear buckling analysis (here the eigenvalue extraction method is set to Lanczos by default).

Thats what I could find through the literature and other sources.

But I was wondering what exactly is the perturbation factor is and how it effects the Buckling analysis that seems to appear after the regular non-linear analysis .

Or probably somebody could correct me if the information i got about the solution sequence is wrong.

Thanks a lot in advance.

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