Coupling for Indirect Vibro-Acoustic BEM and Acoustics Transient BEM

When defining a one-way (weak) fluid-structure interface, you can now select the acoustic fluid elements to couple to the structure, and specify the search distance to determine which elements are included in the coupling. This enhancement is supported for:

• Fast Multipole Indirect BEM Vibro-Acoustics

• H-Matrix Indirect BEM Vibro-Acoustics

• Acoustics Transient BEM Vibro-Acoustics

In a one-way (weak) fluid-structure interface, or coupling, the structure affects the fluid, but the fluid does not affect the structure. The one-way fluid-structure interface is available when the structure is represented as a mode set or as a structural mesh.

You select the acoustic region to be coupled to the mode set by specifying the Maximum Distance, which specifies the search distance for the software to use. The acoustic element center is considered to determine which fluid element is affected by the one-way coupling. To avoid coupling instabilities, use a search distance greater than one-half of the element size for both Relative and Absolute selections.

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Coupling for Indirect Vibro-Acoustic BEM and Acoustics Transient BEM, Simcenter 3D 2021.1 Series

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