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Extracting frequency dependent matrices (of a nonlinear eigenvalue problem)

Posted Jun 24, 2024, 11:40 a.m. EDT 0 Replies

Filipe Soares
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The below post is related to an archived discussion

Hello,

I'm trying to extract (via Matlab LiveLink) the matrices from a nonlinear eigenvalue problem stemming from a physical model.

The stiffness and damping matrices of the problem are frequency dependent (as in the linked discussion), hence, I want to extract the matrices evaluated at a particular eigenvalue linearization point. Unfortunately, I'm not getting the correct matrices using the expect command:

mphmatrix(model,'sol1','out',{'K','E','D'},'complexfun','on','eigname','lambda', 'eigref',eigref)

(Solving the eigenvalue problem using the extracted matrices, does not give me the same results from the COMSOL solver)

I am missing some subtle detail?

Thanks in advance,

Filipe Soares

0 Replies Last Post Jun 24, 2024, 11:40 a.m. EDT
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Hello Filipe Soares

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