Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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A Study on Shortcomings of Mechanical Model with Lumped Mass for Dynamic Characterization of Hydraulic Mounts and Confirmation of Hydraulic Model by Improvement of Experimentations

유체 봉입 마운트의 동적 특성화를 위한 집중질량 요소를 갖는 기계적 모형의 문제점 파악과 실험 방법 개선을 통한 수력학적 모형의 타당성 확인

  • 배만석 (한국과학기술원 기계공학과) ;
  • 이준화 (한국과학기술원 기계공학과) ;
  • 김광준 (한국과학기술원 기계공학과)
  • Published : 2003.05.01
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Abstract

Hydraulic mounts show strong1y frequency-dependent stiffness and damping characteristics in low frequency range, which result from so called inertia track dynamics. A lumped mass has been incorporated in several mechanical models of the literature to take the inertia effect of the fluid in the track into consideration. Although complex s%illness by the mechanical model showed good agreements with the measured values, there exists a critical pitfall. In this paper, the shortcomings of mechanical models with lumped mass for hydraulic founts are clearly identified by illustrating actual measurements of the stiffness parameters for a hydraulic mount. It is conclusively discussed that the inertia effect of the fluid flow through the circular track is significant but latent. As an alternative to the mechanical model, a hydraulic model is claimed to be used for further dynamic analysis of engine/mount system or whole car system.

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References

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