Abstract
This paper is concerned with an integral equation approach to certain structural-acoustic coupling problems. It is assumed that the structure is composed of plate components and is excited by the external or the internal noise source. The vibration of the cavity or the ambient atmosphere is governed by the Helmholtz equation, and that of the structure by the reduced out-of-plane bending vibration equation. These differential equations are transformed into the set of boundary integral equations, and they can be solved means of the usual boundary element method and the boundary-domain element method. Taking account of the coupling conditions on the surface of the structure, we can finally obtain the coupled set of linear simultaneous equations with respect to nodal values. The solution of these equations enables us to investigate the properties of the structural-acoustic coupling system under consideration. The potential usefulness of the proposed method is demonstrated through some sample computations.
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More From: Computer Methods in Applied Mechanics and Engineering
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