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drucker-prager, then frequency extraction?

drucker-prager, then frequency extraction?

drucker-prager, then frequency extraction?

(OP)
xerf,

Thank you for all your help.  One final question for you if  you don't mind, or anyone else.  After I run a compaction simulation, is there any way to take the compact and run a frequency extraction so as to compare natural frequencies to the pre-compact?  

thanks again,
Chris

RE: drucker-prager, then frequency extraction?

You can try to define a "Frequency" step in the end of the analysis.
Module Step ->Create Step
Procedure type: Linear Perturbation
Step Type: Frequency

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