Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Optimal Design of Nonlinear Hydraulic Engine Mount

  • Ahn Young Kong (Research Center for Machine Parts and Material Processing, University of Ulsan) ;
  • Song Jin Dae (School of Mechanical Engineering, Pukyong National University) ;
  • Yang Bo-Suk (School of Mechanical Engineering, Pukyong National University) ;
  • Ahn Kyoung Kwan (Research Center for Machine Parts and Material Processing, School of Mechanical & Automotive Engineering, University of Ulsan) ;
  • Morishita Shin (Graduate School of Environment and Information Sciences, Yokohama National University)
  • Published : 2005.03.01
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Abstract

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 decoupler 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.

Keywords

References

  1. Ahn, Y. K., Song, J. D. and Yang, B. S., 2003, 'Optimal Design of Engine Mount Using an Artificial Life Algorithm,' Journal of Sound and Vibration, Vol. 261, No. 2, pp. 309-328 https://doi.org/10.1016/S0022-460X(02)00989-6
  2. Bernuchon, M, 1984, 'A New Generation of Engine Mount,' SAE Techanical Paper #840259
  3. Brach, R. M. and Haddow, A. G., 1993, 'On the Dynamic Response of Hydraulic Engine Mounts,' SAE Technical paper #931321
  4. Colgate, J., Chang, T., Chiou, C., Liu, K. and Kerr, M., 1995, 'Modeling of a Hydraulic Engine Mount Focusing on Response to Sinusoidal and Composite Excitations,' Journal of Sound and Vibration, Vol. 184, pp. 503-528 https://doi.org/10.1006/jsvi.1995.0330
  5. Flower, W. C., 1985, 'Understanding Hydraulic Mounts for Improved Vehicle Noise Vibration and Ride Qualities,' SAE Techanical Paper #850975
  6. Gau, S. J. and Cotton J. D., 1995, 'Experimental study and Modeling of Hydraulic Mount and Engine System,' SAM Techanical Paper #951348
  7. Geisberger, A., 2000, 'Hydraulic Engine Mount Modeling, Parameter Identification and Experimental Validation,' Master's thesis, University of Waterloo, Canada
  8. Geisberger, A., Khajepour, A. and Golnaraghi, F., 2002, 'Nonlinear Modeling of Hydraulic Mounts : Theory and Experiment,' Journal of Sound and Vibration, Vol. 249, No. 2, pp. 371-397 https://doi.org/10.1006/jsvi.2001.3860
  9. Jazer, G. N. and Golnaraghi, M. F., 2002, 'Nonlinear Modeling, Experimental Verification, and Theoretical Analvsis of a Hydraulic Engine Mount.' Journal of Vibration and Control, Vol. 8, pp. 87-116 https://doi.org/10.1177/1077546302008001519
  10. Kim, G. and Singh, R., 1995, 'A study of passive and Adaptive Hydraulic Engine Mount Systems with Emphasis on Non-linear Characteristics.' Journal of Sound and Vibration, Vol. 179, pp. 427-453 https://doi.org/10.1006/jsvi.1995.0028
  11. Lee, K. and Choi, Y., 1995, 'Performance Analysis of Hydraulic Engine Mount by Using Bond Graph Method,' SAE Techanical Paper #951347
  12. Margolis, D. and Wilson, R., 1997, 'Modeling simulation and Physical Understanding of Hydromounts,' Master's Thesis, University of California
  13. Milfer, L. R., Ahmadian, M., Nobles, C. M. and Swanson, D. A., 1995, 'Modeling and Performance of an Experimental Active Vibration Isolator.' Trans. ASME Journal of Vibration and Acoustics, Vol. 117, No. 3A, pp. 272-278 https://doi.org/10.1115/1.2874447
  14. Royston, T. and Singh, R., 1997, 'Study of Nonlinear hydraulic Engine Mounts Focusing on Decoupler Modeling and Design,' SAE Techanical Paper #971936
  15. Seto, K., Sawatari, K., Nagamatsu, A., Ishihama, M. and Doi, K., 1991, 'Optimum Design Method for Hydraulic Mount,' SAE Techanical Paper #911055
  16. Singh, R., Kim, G. and Ravindra, P. V., 1992, 'Linear Analysis of Automotive Hydro-Mechanical Mount with Emphasis on Decoupler Characteristics,' Journal of Sound and Vibration, Vol. 158, No. 2, pp. 219-243 https://doi.org/10.1016/0022-460X(92)90047-2
  17. Suresh, N., Shankar, S. and Bokil, V., 1994, 'Develpoment of Idealistic Hydromount Characteristics to Minimize Engine Induced Vibrations Using Unconstrained Minimization,' SAE Paper #941741
  18. Swanson, D. A., 1993, 'Active Engine Mounts for Vehicles,' SAE Paper #932432
  19. Tao, J. S., Liu, G. R. and Lam, K. Y., 2000, 'Design Ontimization of Marine Engine-Mount system,' Journal of Sound and Vibration, Vol. 235, No. 3, pp. 477-494 https://doi.org/10.1006/jsvi.2000.2945
  20. The Mathworks Inc. Version 2. 1 (Release 12) , Optimization Toolbox for Use with Matlab
  21. Ushijima, T, Takano, K. and Kojima, H., 1988, 'High Performance Hydraulic Mount for Improving Vehicle Noise and Vibration,' SAE Techanical Paper #880073
  22. Vahdati, N., 1999, 'Incorporation of TVAs on Soft structures to Improve Vibration Isolation,' Asia-Pacific Vibration Conference '99, Singapore, December 1999
  23. Yang, B. S. and Song, J. D., 2001, 'Enhanced Artificial Life Algorithm for Fast and Accurate Optimization Search,' Proceedings of Asia-Pacific Vibration Conference, pp. 732-736
  24. Yu, Y., Peelamedu, S. M., Naganathan, N. G. and Dukkipati, R. V., 2001, 'Automotive Vehicle Engine Mounting Systems: A Survey,' Trans. ASME, J. Dynamic Systems, Measurement, and Control, Vol. 123, pp. 186-194 https://doi.org/10.1115/1.1369361