A comparison of finite element and analytic models of acoustic scattering from rough poroelastic interfaces | Zendy

Anthony L. Bonomo | Zendy; Marcia J. Isakson | Zendy; Nicholas P. Chotiros | Zendy

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A comparison of finite element and analytic models of acoustic scattering from rough poroelastic interfaces

Author(s) -

Anthony L. Bonomo,

Marcia J. Isakson,

Nicholas P. Chotiros

Publication year - 2015

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.619

H-Index - 187

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.4914947

Subject(s) - poromechanics , scattering , finite element method , perturbation (astronomy) , mathematical analysis , born approximation , perturbation theory (quantum mechanics) , mathematics , physics , optics , geology , porous medium , porosity , quantum mechanics , thermodynamics , geotechnical engineering

The finite element method is used to model acoustic scattering from rough poroelastic surfaces. Both monostatic and bistatic scattering strengths are calculated and compared with three analytic models: Perturbation theory, the Kirchhoff approximation, and the small-slope approximation. It is found that the small-slope approximation is in very close agreement with the finite element results for all cases studied and that perturbation theory and the Kirchhoff approximation can be considered valid in those instances where their predictions match those given by the small-slope approximation.

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