Introduce the linear buckling mode as the initial imperfection

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Hi, I want to introduce the linear buckling mode as the initial imperfection of nonlinear buckling analysis. It's easy to do that by comsol 6.0, and I need to specify a scale factor for each mode. But I don't know how much the scale factor should be when I want to take the mode with the size of 1% of the shell thickness as the initial imperfection, because I don't know How does COMSOL normalize the size of buckling modes.


1 Reply Last Post Aug 15, 2022, 4:32 a.m. EDT
Henrik Sönnerlind COMSOL Employee

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Posted: 1 month ago Aug 15, 2022, 4:32 a.m. EDT

If you have an existing solution, you can just look at the peak displacements for each eigenmode.

Before solving, you can set the normalization method for the eigenmodes in the Output section of the settings for the Eigenvalue Solver node in the study sequence.

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Henrik Sönnerlind
COMSOL
If you have an existing solution, you can just look at the peak displacements for each eigenmode. Before solving, you can set the normalization method for the eigenmodes in the *Output* section of the settings for the *Eigenvalue Solver* node in the study sequence.

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