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Piezoelectric stator eigen frequency study
Posted 28 mars 2017, 08:31 UTC−4 Modeling Tools & Definitions, Parameters, Variables, & Functions, Structural Mechanics Version 5.0 2 Replies
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Hi,
I am modelling the resonance behavior of a piezoelectric stator which is a metallic structure bonded to a piezoelectric material. Under the Electrostatics physics module, I have a voltage terminal type boundary condition on the piezoelectric material top surface and a ground type BC on the opposite face.
The simulation run successfully and I get as result the set of resonance modes and there corresponding frequencies. However, I noticed that if I remove the terminal voltage BC, the frequencies of the resonance modes shift with non negligible values (500 Hz for a resonance frequency of 23 kHz).
From my point of view, the resonance frequencies depends only upon the structure dimensions and materials and have nothing to do with the presence or not of a terminal voltage.
If anyone can explain this phenomenon, I will be so thankful.
I am modelling the resonance behavior of a piezoelectric stator which is a metallic structure bonded to a piezoelectric material. Under the Electrostatics physics module, I have a voltage terminal type boundary condition on the piezoelectric material top surface and a ground type BC on the opposite face.
The simulation run successfully and I get as result the set of resonance modes and there corresponding frequencies. However, I noticed that if I remove the terminal voltage BC, the frequencies of the resonance modes shift with non negligible values (500 Hz for a resonance frequency of 23 kHz).
From my point of view, the resonance frequencies depends only upon the structure dimensions and materials and have nothing to do with the presence or not of a terminal voltage.
If anyone can explain this phenomenon, I will be so thankful.
2 Replies Last Post 28 mars 2017, 12:10 UTC−4