Finite-element modelling of acoustic wave scattering from fluid, rigid and elastic objects

Omar Falou, J. Carl Kumaradas, Michael C. Kolios

Abstract


A finite element model (FEM) of acoustic wave propagation through 3-D arbitrary-shaped structures is developed to solve the problem of high frequency acoustic scattering. The FEMLAB® software package was used to develop and solve acoustic scattering models from fluid, rigid, and elastic spheres immersed in a fluid medium, for which analytical solutions are available. The entire computation domain is modeled as a sphere filled with fluid domains. It is found that the FEM provided accurate predictions of wave scattering by three types of scatterers, fluid, rigid immovable, and elastic.

Keywords


Acoustic wave propagation; Computation theory; Computer software; Elasticity; Finite element method; Natural frequencies; Rigidity; 3-D arbitrary-shaped structures; Acoustic scattering models; Elastic spheres; Finite-element modeling

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