20508 ベーシスベクトル法を用いた大規模最適化解析(大規模数値解析(2),OS11 大規模数値解析)

概要

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This paper aims at minimizing the radiation of sound power from the three-dimensional oil pan of an industrial sewing machine based on the optimization of its structural dynamic behavior. The structural dynamic behavior (frequency response) of the oil pan, which generates the noise, is optimized using a shape optimization technique that uses the basis vector method by means of a finite element method (FEM). The boundary element method (BEM) is used to compute the radiated sound power out put from the vibrating oil pan. And the numerical results of the calculation of sound power at specified points below the bottom part of the oil pan shows that there is a substantial reduction (≈35%) of area under the radiated sound power curves between the original model and the final optimized shape of the oil pan in the 100-2000Hz frequency range, while the total weight did not increase with respect to the original weight.
一般社団法人日本機械学会の論文
2006-03-09