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Different methods for computing the sound transmission through finite, thin baffled plates

: Piscoya, R.; Ochmann, M.; Aoki, Y.; Maysenhölder, W.

Elnady, T. ; The International Institute of Acoustics and Vibration -IIAV-:
Recent developments in acoustics, noise and vibration. 17th International Congress on Sound and Vibration, ICSV 2010. CD-ROM : Cairo, 18 - 22 July 2010 ; proceedings
Cairo, 2010
8 pp.
International Congress on Sound and Vibration (ICSV) <17, 2010, Cairo>
Conference Paper
Fraunhofer IBP ()

In this paper, different approaches for calculating the sound transmission through thin finite plates under arbitrary (also dissipative) boundary conditions are investigated. First, the vibra-tions of the plate are determined by using a basis of polynomial functions. Second, a purely numerically based method, i.e. a coupled Finite-Element-Method (FEM) - Boundary-Element-Method (BEM) is applied. Finally, an iterative method which starts with the blocked- pressure approximation and takes into account the fluid load incrementally is devel-oped. Results obtained with these methods are presented and discussed.