Hi, I've a large model with different damping coefficients via GE within the MAT1 card and run a frequency response analysis.

When reducing even some small parts of it to a superelement with K4DAMP and AUTOQSET,YES I get slightly different displacements in the higher frequencies range in compare to using no superelement at all, image attached. Is it because the overall reduction of damping in some of the parts isn't accurate enough and is there a way to improve that?

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0 Sanjay Patel over 1 year ago

Try keeping more QSET dofs by requesting more modes for reduction step (for SE).
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0 ftsl over 1 year ago

AUTOQSET used some 22000 SPoints and in one try I used 40000 manually but no changes in results.
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0 Sanjay Patel over 1 year ago

If you send in necessary files for both we can look into it. Please create a support case.
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