Two-dimensional acoustic analysis by concentrated mass model

Satoshi Ishikawa, Shinya Kijimoto, Yosuke Koba, Ryoma Owaki, Yuuki Mori

研究成果: Contribution to journalArticle査読

抄録

FDTD method and CIP method are used for an acoustic analysis in time domain. However, these methods do not take into account a sound attenuation from viscosity. In our study, we propose a concentrated mass model which consists of spring-mass-damper system to perform a two-dimensional acoustic analysis. The dampers of this model consider viscosity of air. In this paper, we derive mass, connecting springs, and connecting dampers. The characteristic of connecting spring is derived from the condition of adiabatic change of air, and the connecting damper is derived from the normal stress. To confirm the validity of the proposed model, the numerical results obtained by the concentrated mass model are compared with the theoretical value of a traveling wave, and with the theoretical value of the natural frequency. All numerical computational results agree very well with the theoretical values. Therefore, it is concluded that the proposed model is valid for the two-dimensional acoustic analysis.

本文言語英語
ページ(範囲)744-748
ページ数5
ジャーナルNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
79
801
DOI
出版ステータス出版済み - 2013

All Science Journal Classification (ASJC) codes

  • 凝縮系物理学
  • 機械工学

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