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langevin piezoelectric transducer

Posted 24 oct. 2015, 01:09 UTC−4 0 Replies

Asim Khan
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I am working on piezoelectric langevin transducer. I have few queries, if entertained will be highly obliged. I am using COMSOL 5.1.I used the bolt with no thread from application libraries for prestressing. Without prestressing impedance curve seems good and with good agreement with the values calculated by eigen solution, but when I use Pre Tension bolt option in solid mechanics and then apply frequency domain study the displacements are large enough and also the impedance curve is not looking good.
I have also applied pre-stressed study but in the example of tonzipil pre-stressed transducer I read that this study is only used when the resultant solution results are much smaller than the stationary solver. So for this reason pre-stressed study in of no use.
I have also introducer damping and dielectric losses for piezoelectric discs.
My question is for displacement should I take” w “ or “solid.disp”” for actual displacement ?Keep in mind that piezoelectric disc is polarized in z direction
How to check the effect of prestress using frequency domain?
Waiting for kind help. Thanks
0 Replies Last Post 24 oct. 2015, 01:09 UTC−4
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