한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제13권6호
  • /
  • Pages.163-169
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  • 2005
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  • 1225-6382(pISSN)
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  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
권호 표지

차실 소음 저감을 위한 복층 에어갭 공명기가 설치된 음향 공동의 강제 음향 응답 해석

Forced Acoustic Response Analysis of an Acoustic Cavity with a Double Air-gap Resonator for Reducing Passenger Compartment Noises

  • 강상욱 (한성대학교 기계시스템공학과)
  • Kang, Sang-Wook (Department of Mechanical Systems Engineering, Hansung University)
  • 발행 : 2005.11.01
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초록

A theoretical formulation on the forced acoustic response of an enclosed cavity having a double air-gap resonator on one of boundary panels of the cavity is developed in the paper. The double gap resonator consists of two air-gaps and two partition sheets as in the author's previous papers. This paper reveals that the double gap resonator reduces the level of a target noise peak by splitting the peak as two small peaks, and that it is more effective when it is designed so that the upper gap thickness is larger than the lower gap thickness under the constraint that the entire gap thickness is fixed as a constant value. Finally, verification experiments show that the theoretical formulation and analysis results are valid by comparing theoretical results with experimental ones.

키워드

참고문헌

  1. S. W. Kang, J. M. Lee and S. H. Kim, 'Structural-acoustic Coupling Analysis on Vehicle Passenger Compartment with the Roof, Air-gap and Trim Boundary,' Journal of Vibration and Acoustics (ASME), Vol.112, No.3, pp.196-202, 2000
  2. S. W. Kang and J. M. Lee, 'Sound Absorption Characteristics of Air-gap Systems in Enclosed Cavities,' Journal of Sound and Vibration, Vol.259, No.1, pp.209-218, 2003 https://doi.org/10.1006/jsvi.2002.5074
  3. S. W. Kang and J. M. Lee, 'Noise Reduction of an Enclosed Cavity by means of Air-gap Systems,' Int. J. Automotive Technology, Vol.5, No.3, pp.209-213, 2004
  4. D. Reynolds, Engineering Principles of Acoustics Noise and Vibration Control, pp.333-344, Allyn and Bacon, 1981
  5. F. J. Fahy and C. Schofield, 'A Note on the Interaction between a Helmholtz Resonator and an Acoustic Mode of an Enclosure,' Journal of Sound and Vibration, Vol.72, No.3, pp.365- 378,1980 https://doi.org/10.1016/0022-460X(80)90383-1
  6. A. Selamet and Z. L. Ii, 'Circular Asymmetric Helmholtz Resonators,' Journal of the Acoustical Society of America, Vol.107, No.5, pp.2360-2369, 2000 https://doi.org/10.1121/1.428622