Journal of Mechanical Science and Technology

, Volume 19, Issue 3, pp 768–777 | Cite as

Optimal design of nonlinear hydraulic engine mount

  • Young Kong Ahn
  • Jin Dae Song
  • Bo-Suk Yang
  • Kyoung Kwan Ahn
  • Shin Morishita


This paper shows that the performance of a nonlinear fluid engine mount can be improved by an optimal design process The property of a hydraulic mount with inertia track and decouplen differs according to the disturbance frequency range. Since the excitation amplitude is large at low excitation frequency range and is small at high excitation frequency range, mathematical model of the mount can be divided into two linear models One is a low frequency model and the other is a high frequency model The combination of the two models is very useful in the analysis of the mount and is used for the first time in the optimization of an engine mount in this paper Normally, the design of a fluid mount is based on a trial and error approach in industry because there are many design parameters In this study, a nonlinear mount was optimized to minimize the transmissibilities of the mount at the notch and the resonance frequencies for low and high-frequency models by a popular optimization technique of sequential quadratic programming (SQP) supported by MATLAB(r) subroutine. The results show that the performance of the mount can be greatly improved for the low and high frequencies ranges by the optimization method

Key Words

Fluid Mount Nonlinear Fluid Mount Optimal Design 


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Copyright information

© The Korean Society of Mechanical Engineers (KSME) 2005

Authors and Affiliations

  • Young Kong Ahn
    • 1
  • Jin Dae Song
    • 2
  • Bo-Suk Yang
    • 2
  • Kyoung Kwan Ahn
    • 3
  • Shin Morishita
    • 4
  1. 1.Research Center for Machine Parts and Material ProcessingUniversity of UlsanUlsanKorea
  2. 2.School of Mechanical EngineeringPukyong National UniversityBusanKorea
  3. 3.Research Center for Machine Parts and Material Processing, School of Mechanical & Automotive EngineeringUniversity of UlsanUlsanKorea
  4. 4.Graduate School of Environment and Information ScienciesYokohama National UniversityYokohamaJapan

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