Erik,
thank you for letting me know the MEMS extension is out of commission. I have done as you suggested, and got results for electric voltage without problems. I do need to ask for clarification though: In my previous post you stated that in coupled response modal, the electric voltage is just scaled eigenvectors, and hence doesn't represent any real electric voltage in the piezo body. In coupled field harmonic, does the electric voltage result now represent voltage created at resonance frequency during excitement, or is it still just scaled eigenvectors?
Here are a couple screenshots of the new simulation setup and the results.
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