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Thermal preload vs. dynamic response

Thermal preload vs. dynamic response

Thermal preload vs. dynamic response

(OP)

I have a structure being driven into hardening supports due to thermal expansion or contraction.  Test work shows that this changes its dynamic response.  I'm modeling using PSTRES effects found using a static run at elevated temps, then a harmonic run (using the actual external operatinal cyclic forcing function) as follow-up.  Unfortunately, the harmonic run still applies the previous temperature as an alternating load--which then unnaturally augments the dynamics.

Any suggestions?

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