粘塑性構成則を用いた樹脂の遮音解析

概要

論文の詳細を見る
Resin engine covers have recently been used in some automobiles to reduce noise radiation. The sound insulation effect of resins is confirmed from experiments but the method of predicting by how much the noise will be reduced in the early design stages has not been established yet. In this paper, the finite element analysis of acoustic-structural coupling problems is introduced as the prediction method. The essential feature of the method presented here is that the material damping of a resin is considered using a set of viscoplastic constitutive equations that are determined by tensile tests at various strain rates. To demonstrate the effectiveness of the present method, some numerical examples are shown. The obtaind results suggest that the sound reduction due to a resin cover is greater than that due to an aluminium cover having the same surface density unless the frequency of sound is close to the natural frequencies of the resin cover.
一般社団法人日本機械学会の論文
1994-02-25