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a cantilever beam 50 mm immersed in liquid

Posted 14 nov. 2018, 02:25 UTC−5 1 Reply

Nebyat Weldearegay
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i want to extract the frequencies of a cantilever beam of length 300 mm and immersed in liquid the one sixth part of the cantilever length but when i excute the compute in comsol multiphysics it returns an error of the following. so kindly please share me how to fix these errors and warning.

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1 Reply Last Post 14 nov. 2018, 05:02 UTC−5
Henrik Sönnerlind COMSOL Employee

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Posted: 6 years ago 14 nov. 2018, 05:02 UTC−5
Updated: 6 years ago 14 nov. 2018, 05:03 UTC−5

Hi,

This blog post discusses an analysis similar to yours:

https://www.comsol.com/blogs/natural-frequencies-immersed-beams/

Note that a fluid-structure interaction coupling is not suitable here. The fluid flow interfaces cannot be used for eigenfrequnecy analysis (since Navier-Stokes equations are nonlinear). The current problem falls into the acoustics regime.

Regards,
Henrik

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Henrik Sönnerlind
COMSOL
Hi, This blog post discusses an analysis similar to yours: Note that a fluid-structure interaction coupling is not suitable here. The fluid flow interfaces cannot be used for eigenfrequnecy analysis (since Navier-Stokes equations are nonlinear). The current problem falls into the acoustics regime. Regards, Henrik

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