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?