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Vibration of a 3D fixed-fixed string

Posted 25 sept. 2019, 15:21 UTC−4 Acoustics & Vibrations, Structural Mechanics Version 5.4 2 Replies

Vishvesh Koranne
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When I do the eigenfrequency study for the string, all I get are axial modes and not transverse modes. Could someone tell me why it is happening? I ticked the box to include geometric nonlinearities.

While I understand that it is a 2d problem, this is my starting point for modeling a tritare or an N string tyupe structure which will have motion in 3 dimensions. I matched my model with study 1 of vibrating string example available online.

Any help is appreciated

2 Replies Last Post 28 sept. 2019, 07:50 UTC−4
Henrik Sönnerlind COMSOL Employee

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Posted: 5 years ago 27 sept. 2019, 08:47 UTC−4

Hi,

You have a Straight Edge Constraint in the model which does its job: Keeping the edge straight.

Just disable it, and you get transversal modes.

Regards,
Henrik

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Henrik Sönnerlind
COMSOL
Hi, You have a *Straight Edge Constraint* in the model which does its job: Keeping the edge straight. Just disable it, and you get transversal modes. Regards, Henrik
Vishvesh Koranne
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Posted: 5 years ago 28 sept. 2019, 07:50 UTC−4

Dear Henrik,

Thanks a lot. It solved the problem.

Dear Henrik, Thanks a lot. It solved the problem.

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