Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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A Study on Structure-Borne Noise Reduction for Resiliently Mounted Pumps for Ship

탄성지지된 박용 펌프의 고체음저감에 관한 연구

  • Kim, Hyun-Sil (Acoustics Lab., Korea Institute of Machinery & Materials) ;
  • Kang, Hyun-Ju (Acoustics Lab., Korea Institute of Machinery & Materials) ;
  • Kim, Bong-Ki (Acoustics Lab., Korea Institute of Machinery & Materials) ;
  • Kim, Sang-Ryul (Acoustics Lab., Korea Institute of Machinery & Materials)
  • 김현실 (한국기계연구원 음향소음팀) ;
  • 강현주 (한국기계연구원 음향소음팀) ;
  • 김봉기 (한국기계연구원 음향소음팀) ;
  • 김상렬 (한국기계연구원 음향소음팀)
  • Published : 2007.10.20
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Abstract

In this paper, SBN (Structure-Borne Noise) reduction of resiliently mounted machinery and effect of the foundation impedance on mount performance is studied. SBN reduction through the mount is analyzed by using two theoretical models; mass-spring model and wave model, in which longitudinal wave propagation is included. It is found that floor impedance greatly affects SBN reduction through lower mount, while it is almost negligible to SBN reduction through upper mount. Comparisons between measurement and predictions shows that the mass-spring model is valid only in low frequency range below few hundred Hz, while for high frequency ranges longitudinal wave propagation in the mount must be considered.

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References

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