Frequency Response Optimization

Hi Mesun,

Please find the attached image about SSQ and RSS from OptiStruct help:

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Hi;

Thank you..I am tryin gto use those options in my frequency response analysis.

I would like to kindly ask you to give me support in solution of folowing problem...I am having some error information from optistruct..

Currently i tried to build my direct frequency response analysis model ( simple cantilever beam model) used tool/unit freq response .. way and performed the analysis...It worked fine ..

Then i tried to build my topology optimization step having some nodal displacements as frf displacement response.

and also colume fraction of my design space as constraint.

When i choose objection function as min frf-disp under loadcase of Direct Frequency Response Analysis i had an error ( attached)

Then tried to use same methodology given in OS 2095 tutorial like having frf-disp as constrained with UB value and when i select again the load step as DFRA again had same error( Attached)

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Hi,

Please try with min volume as objective & frf displacement as design constraint or any other recommended formulation attached in thumbnail.

I have attached thumbnail for commonly and suggested formulation for topology optimization mentioned Optistruct FAQ. Refer  Optistruct user guide for detailed information.

Regards

Rahul R

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