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Frequencies on a squared plate (membrane)

Posted Jan 6, 2015, 9:48 a.m. EST Structural Mechanics Version 4.4 2 Replies

Fábio Cyro Ribeiro Batista
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Hi guys, i'm sorry if i'm doing this wrong but i'm kinda new on COMSOL and I'd like to know if you guys could help me on this exercise:

i need to see how is the behavior of the frequencies on a squared membrane, like chladni figures experiment. There's a model for circular ones that works pretty well but i can't adapt for myself, because there's data like pre-tensions that i won't need right now. My plate is only fixed on the center by a screw on a base made by me. I just would like to see how would be this behavior on some frequencies (6 is fine).

Plate:
size - 16 cm
thickness - 3 mm
poisson - 0.33
young - 69 GPa
2 Replies Last Post Apr 22, 2015, 9:07 p.m. EDT
Dima Apter
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Posted: 10 years ago Jan 7, 2015, 3:15 a.m. EST
Hi Fabio,

Please check if the attached model can help.

Regards,
Dima.

--
Dima Apter
A2Z Consulting Ltd.
www.a2z-consulting.com
Hi Fabio, Please check if the attached model can help. Regards, Dima. -- Dima Apter A2Z Consulting Ltd. www.a2z-consulting.com

Attachments:

Sam B
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Posted: 10 years ago Apr 22, 2015, 9:07 p.m. EDT
Dima,

Why do you apply a fixed boundary condition to the center hole? Isn't this where the forcing of the plate would actually occur (say, from a shaker)?

Thanks,
Sam
Dima, Why do you apply a fixed boundary condition to the center hole? Isn't this where the forcing of the plate would actually occur (say, from a shaker)? Thanks, Sam

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