Sound radiation from poroelastic materials

Authors

  • F.C. Sgard Lab. des Sciences de l'Habitat, DGCB URA CNRS 1652, Ecl. Natl. Travaux Pub. de l'Etat, 69518 Vaulx-en-Velin Cedex, France
  • N. Atalla Groupe d'Acoustique, Université de Sherbrooke, Univ. de Sherbrooke, Sherbrooke, Que. J1K2R1, Canada

Keywords:

Acoustic waves, Boundary conditions, Boundary element method, Degrees of freedom (mechanics), Elastic moduli, Elasticity, Finite element method, Integral equations, Porous materials, Pressure effects, Vectors, Viscosity, Biot's poroelasticity equations, Elastic plates, Inertial forces, Solid phase displacement

Abstract

An approach to predict the sound radiation of baffled poroelastic media including fluid loading effect is discussed. The problem has been solved using a mixed finite-element method (FEM)-boundary element method (BEM) approach. In this approach the fluid loading is accounted for using an admittance matrix and solid phase-interstitial pressure coupling terms. The method has been considered in the case of an acoustic excitation. The results show that the radiation of the porous medium into the semi infinite fluid amounts to an added admittance term onto the interface interstitial pressure degrees of freedom.

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Published

2004-09-01

How to Cite

1.
Sgard F, Atalla N. Sound radiation from poroelastic materials. Canadian Acoustics [Internet]. 2004 Sep. 1 [cited 2021 Dec. 4];32(3):16-7. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1605

Issue

Section

Proceedings of the Acoustics Week in Canada

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