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Acoustic structure interaction

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Hello, i'm using Comsol 4.2a to simulate a 2D scenario with an air-filled room (10x5) meters, with a boundary PML region (1 m of thickness on the four sides). Into this region i've inserted a rectangular Steel box (6x2,5) meters with a 5mm of thickness.
The box is air filled too. Inside the box i've created a power point source (frequency domain analisys).

In this scenario i want to evaluate the Transmission loss, between the pressure inside the box and the pressure outside of it. In future i want to misurate the displacement of the steel structure and the acceleration of the material.

I have a convergence issue when i simulate this scenario at low frequencies (2-50 Hz) and this issue remains at certain frequencies.

How can i simulate this environment ad infrasound frequencies?

I've attached a Jpeg file with a rudimental image of the scenario.

Thanks for your time.

Goodbye.


1 Reply Last Post 17 gen 2012, 06:26 GMT-5

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Posted: 1 decade ago 17 gen 2012, 06:26 GMT-5
Hi, anyone on this board uses the Acoustic structure interaction, with a similiar scenario?

I think the convergence issue is related to the very thin plate of the box (the wavelenght is very large) but i don't want to create a box with a thicker plates, because i want to simulate that box, not another box.

Anyone can help me?

Thanks.

Bye.
Hi, anyone on this board uses the Acoustic structure interaction, with a similiar scenario? I think the convergence issue is related to the very thin plate of the box (the wavelenght is very large) but i don't want to create a box with a thicker plates, because i want to simulate that box, not another box. Anyone can help me? Thanks. Bye.

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