多数の共鳴器から成る消音装置の消音効果の予測(機械力学,計測,自動制御)

概要

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This paper describes the prediction on attenuation of a silencer equipment with many resonators by using FEM. The purpose of this study is to predict the attenuation of the silencer equipment in order to realize the reduction of infra-sound which generates in various plants. The attenuation is firstly predicted by a conventional method and secondary calculated by FEM. In modeling of FEM, An optimal mesh number is determined so that the variation of the natural acoustic frequency becomes within 10% of the detail model by calculating of various mesh models. Because the fine mesh model consumes much time to calculate. Finally, the experiment is conducted and the calculated result is compared with the experimental one. As a result, it was clarified that the attenuation of the complex silencer with many resonators could be predicted by FEM with accuracy of ±3% and the conventional method could also be predicted by taking into account of 70% the value of the calculated result. However it should be noticed that this fact is not universal.
一般社団法人日本機械学会の論文
2005-09-25