弾性板からなる遮音構造を持つ音場の境界要素解析とその応用

概要

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This paper concerns numerical analysis of a certain class of structural-acoustic coupling problems via boundary integral equation formulations. The coupled vibration problem under consideration is modeled as acoustic fields with insulating wall of elastic plates. Plate bending is formulated in terms of integral equations derived by using the fundamental solution of static bending, and they are discretized using the boundary-domain-element method. For the acoustic field governed by the Helmholtz equation, the boundary integral equation formulation is presented and is implemented using the standard BEM. After assembly of these equations, a total system of equations is derived and solved under the given boundary conditions. A few examples are computed and results obtained are discussed, whereby the effectiveness and validity of the proposed solution procedure is demonstrated. Finally, computational results on the transmission loss due to the insulating wall are described.
1997-12-25