A comparison of finite element and analytic models of acoustic scattering from rough poroelastic interfaces.
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.
Applied Research Laboratories, The University of Texas at Austin, 10000 Burnet Road, Austin, Texas 78713-8029 abonomo@arlut.utexas.edu, misakson@arlut.utexas.edu, chotiros@arlut.utexas.edu.
Anthony L
AL
Bonomo
Applied Research Laboratories, The University of Texas at Austin, 10000 Burnet Road, Austin, Texas 78713-8029 abonomo@arlut.utexas.edu, misakson@arlut.utexas.edu, chotiros@arlut.utexas.edu.
Marcia J
MJ
Isakson
Applied Research Laboratories, The University of Texas at Austin, 10000 Burnet Road, Austin, Texas 78713-8029 abonomo@arlut.utexas.edu, misakson@arlut.utexas.edu, chotiros@arlut.utexas.edu.
Nicholas P
NP
Chotiros