Coupling Acoustic-Structure
Posted 8 gen 2025, 09:35 GMT-5 4 Replies
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Hi,
I have modeled in solid mechanics a structure excited by a load and i would like to calculate the radiation in the air domain of a point located in the far field. I have used pressure acoustic boundary element to reduce the computational domain and coupled with acoustic-structure interaction. I only considering frequency domain. The problem is that the model is too computational expensive. I have tried to use axisymmetric symmetry but still the model is not able to converge. the structure is a wind turbine tower by the way.
I saw that i could actually split the problem in two part: first study the vibration of the structure in solid mechanics and afterward use the displacement from that as input in normal displacement boundary condition using boundary element method. But i do not get it.
Any advice or specific instruction.
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Can you be more specific about what the problem is?
Do you have a problem with accessing the solution from the first study or is it a problem in writing the boundary condition for the acoustic problem?
If you create a small example, would you be able to do the same thing for FE based pressure acoustics?
-------------------Henrik Sönnerlind
COMSOL
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You may want to look into a segregated solver setup a la https://doc.comsol.com/5.4/doc/com.comsol.help.aco/aco_ug_acousticstructure.06.33.html
But if you cannot get convergence with 2Daxi, there may be some underlying problem that needs handling before you concern yourself with solver optimization. Get the model going with a rough mesh and build confidence from there.
-------------------René Christensen, PhD
Acculution ApS
www.acculution.com
info@acculution.com
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Filipo,
Can you describe what the real world (3D) problem looks like (geometry, loads, etc)? I have trouble figuring out how a 2D axisymmetry assumption is possible.
Jeff
-------------------Jeff Hiller
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I attach model to clarify. I have tried to use segregated solver but still as suggest from Acculution ApS but still is too computationally expensive. I do not know how to set the boundary condition from the solid mechanics study and use them in pressure acoustic boundary element. I had a look at some tutorial but still is not working.
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