Erik Kostson
Ansys Employee
Hello
You will only get pressure (bulk/acoustic) waves in the fluid (Lamb, are guided waves in plates, or Rayleigh surface waves on thick structure, or in plates if the frequency-plate thickness product is high enough).

So once the membrane oscillates it will generate acoustic waves in the fluid (excitation mode), or if the acoustic waves excite the memearne one will register a voltage (receiver mode)

The question also is not clear. You already say that you use static and harmonic, so you have the modules you want to use.

Thank you

Erik