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Generating stick model from 3D FEM

Generating stick model from 3D FEM

Generating stick model from 3D FEM

(OP)
I have a 3D FEM model of a wing box structure made of CQUAD and CBEAM and I need to create an equivalent stick model using beam elements.
Do you have any suggestion on how to do it?
Is it possible to use Guyan reduction in Nastran to extract an equivalent stick representation?

Thanks

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