535 レゾネータの減衰特性モデル化およびそれを用いたタイヤパターンノイズの低減検討

• 山本 崇史

  工学院大学工学部機械工学科

• 和氣 充幸

  株式会社ブリヂストンタイヤ研究部

書誌事項

タイトル別名

• 535 Modelling of Helmholtz resonator by equivalent fluid properties to improve pattern noise

抄録

Pattern noise generated at contact surface of rolling tire should be suppressed to secure comfort of passenger in vehicle compartment. Frequency of pattern noise ranges around 1 kHz, therefore quarter wave length side branch is too long to design at tread surface of tire. Recently, Helmholtz resonator has been applied to reduce peak level of pattern noise. However, neck of the resonator is considerably narrow, hence acoustic damping that arises on the boundary between air and surrounding structure should be taken into account to predict quantitatively pattern noise level. In this study, air is considered as compressible viscous fluid and linearized Navier-Stokes equation is applied assuming that amplitude of acoustic particle velocity is very small. Fourier's law is also applied to account for thermal dissipation from air medium to surrounding structure. A simplified test rig that has single groove and Helmholtz resonator is prepared and numerical predictions are compared with measured results. They made good agreements, although computational cost is considerably required. To compensate the drawback of high computational cost, an analytical solution for Helmholtz resonator with rectangular cross section is derived assuming that neck is one-dimensional tube and back cavity is rectangular acoustic field, and the neck dimensions are designed to improve damping characteristics of Helmholtz resonator.

収録刊行物

• 機械力学・計測制御講演論文集

  機械力学・計測制御講演論文集 2015 "535-1"-"535-12", 2015-08-25

  一般社団法人日本機械学会

キーワード

• Acoustic
• Damping
• Helmholtz resonator
• Viscosity
• Thermal dissipation

詳細情報

• CRID: 1571135652484097536
• NII論文ID: 110010054256
• NII書誌ID: AA11901770
• ISSN: 13480235
• 本文言語コード: ja
• データソース種別:
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