HI
We can do that using the coupled field harmonic system in Workbench – you can have structural (structurak region), piezo, and acoustic (fluid) regions together there. It is always best to share topology between parts (or mult-body part in design modeler) in order to avoid contacts.
Yo would drive the piezo at the resonance or you can sweep the applied sinusoidal voltage from frequency to an end frequency.
Unfortunetaly we do not have tutorials on this, but see below and the internet:
See example td-53 in the help manual.
(do the same but in the coupled field harmonic system)
All the best
Erik
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