微小円孔のあいた界面を持つ音場の効率的な境界要素解析法

抄録

It is frequently important in engineering to analyze complicated problems with a large number of small holes on an interface boundary. A muffler used for reduction of exhaust noise is a typical example of these problems. The boundary element method could also be applied to such a problem, but this analysis requires a huge number of boundary elements to obtain accurate results. To circumvent this difficulty, the present paper proposes a new boundary element method which can be applied effectively to 3-D acoustic problems with small holes on the interface boundary, governed by the Helmholtz equation. The usefulness of the proposed method is demonstrated through numerical computation for two sample problems.