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Hydro acoustics

Hydro acoustics

Hydro acoustics

(OP)
I am performing a study on the resonance of thin round plates in a fluid (water). However, I can not find any information about the resonance of plates in a fluid.

How can I calculate the resonant frequency of a plate in water if I know the resonant frequency in air?

Thanks!

RE: Hydro acoustics

The water should no effect the freq.

Chris

"In this house, we obey the laws of thermodynamics." Homer Simpson

RE: Hydro acoustics

Well, yes and no. Fluid mass loading is a well studied effect. I /think/ it is mentioned in Harris' Vibration Handbook.

 

Cheers

Greg Locock

SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.

RE: Hydro acoustics

Look for a book by Blevins for such solutions

RE: Hydro acoustics

The fuild should only act as a damper and that has little effect on freq.

Chris

"In this house, we obey the laws of thermodynamics." Homer Simpson

RE: Hydro acoustics

It has a very large effect, lowering the natural frequencies and indeed, as mentioned, Blevins gives the proper formulas for the added mass

RE: Hydro acoustics

Hi,
on this point what I can say is restricted by my employer, but I can say that:
- MotorVib is substancially wrong
- GregLocock is right
- Pja and Rob768 are right and point you in the right direction.

Regards

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