Is it possible to include thermoelastic damping in a modal analysis?

I've been able to successfully use plane223 and solid226 elements to model thermoelastic
damping in a MEMS device. (In a very short period of time I've been able to duplicate and
then extend the work of colleagues using another package.) As in the documented example,
I've used a harmonic excitation input. However, I would also like to repeat the analysis by
using the eigenvector solution as the strain energy input. (Similar to ref #1)


Yes, you could use the damped modal solver accessed with MODOP,DAMP. This solver is quite
slow, so we typically don`t recommend it, however, the more robust and much faster damped modal solver
accessed with MODOP,QRDAMP does not correctly handle the unsymmetric K matrix produced by thermo-elastic damping.





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