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Acoustic finite element formulation of a flexible porous material—a correction for inertial effects

✍ Scribed by P. Göransson

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
585 KB
Volume
185
Category
Article
ISSN
0022-460X

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✦ Synopsis

A weighted residual statement of the partial differential equations of acoustic wave propagation through a porous material, with effects of flexibility taken into account through an inertial correction, is discussed and shown to result in a symmetric finite element formulation of the coupled ''fluid in porous medium''-structure interaction problem. The porous finite element equations are applied to the problem of low frequency transmission through a plane, flat double wall, and the effects of filling the cavity between the panels of the double wall with a porous absorbent and changing the mass density of this material are discussed.

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