円孔を有するエンクロージャ周囲の音場の境界要素解析

概要

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This paper is concerned with the application of the Boundary Element Method (BEM) to the three-dimensional analysis of each distribution of sound pressure levels around two kinds of boxlike enclosure models with circular apertures through which sound is radiated. In these analyses, triangular boundary elements are used and it is assumed that the sound pressure and the normal component of particle velocity on an element are constant. Several mesh models with different numbers of elements are used in order to examine the convergence of the numerical solution. The sound-pressure-level distributions calculated are compared with those measured in detail through a sound visualization method using three color-light-emitting diodes. For both cases of pure tone and 1/3 octave band noise, the calculated results agree fairly well with the measured ones. these results show that the complicated sound fields around such enclosures can be estimated with a high accuracy by using BEM.
一般社団法人日本機械学会の論文
1988-06-25