Acoustic FEA

[gregf84]

Hello,
I am seeking information about an Acoustic FEA problem. I want to simulate a sound wave traveling into a group of very thin vertical columns (actually polymer fibers). These fibers are what you would find in something like a carpet. I would only model 3 or 4 fibers to start with. I need to see if the sound wave is absorbed by the fibers or if the sound wave is slowed down by interation with the fibers. I will later change the diameter of the fibers to see that effect. I am attaching a jpeg to illustrate this problem. Some things I need to know include; what FEA software could do this simulation, is this feasible, should I use ALE methods? Thanks in advance.

Greg...............

 

[IRstuff]

There are a lot of parameters that affect this:
> density of fiber positions
> density of fibers
> structural parameters of fibers
> wavelength of the sound


Is this for school?


TTFN
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[gregf84]

No, I am a CAE engineer (BSME, MSME)at an automotive supplier. We manufacture adhesives and sound deading material.

 

[IRstuff]

I would think that FEA is a bit of an over-reach for something like this. Trying to model individual fibers in a rug or mat is a lot of crunching for very little benefit, since the net properties of the material is only partially driven by the individual fibers of that material.

TTFN
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[gregf84]

What are the other contributing factors? Any information is appreciated.