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Unexpected large displacement in time dependant solver, piezoelectric Devices

Posted Apr 16, 2015, 7:02 a.m. EDT Structural Mechanics Version 4.4 0 Replies

Liang Cheng
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Hi,

I develop a model to analyse the frequency and transient response from a piezoelectric element (GaPO4). When I did the frequency response, I set the voltage of terminal 1 to 1 and when I did the frequency response, I changed the voltage of terminal 1 to pw2(t) which is 6 cycled sin wave. The result looks fine for frequency response in terms of impedance and displacement. However, when I choose one of the frequency to do time dependant analysis, the displacement became 10^18 rather than the order of 10^-10 to 10^-13 [m]. Which is weird.

This model works fine if I changed to material to PZT-5A for both frequency and time dependant solver . Any one can help me to check where is wrong with my model.

Regards,
Liang
0 Replies Last Post Apr 16, 2015, 7:02 a.m. EDT
COMSOL Moderator

Hello Liang Cheng

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