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 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
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
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
Bernuchon, M, 1984, “A New Generation of Engine Mount,”SAE Techanical Paper #840259
Brach, R M and Haddow, A G, 1993, “On the Dynamic Response of Hydraulic Engine Mounts,”SAE Techanical Paper #931321
Colgate, J, Chang, T, Chrou, 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
Flower, W C, 1985, “Understanding Hydraulic Mounts for Improved Vehicle Noise Vibration and Ride Qualities,”SAE Techanical Pa per #850975
Gau, S J and Cotton J D, 1995, “Experimental Study and Modeling of Hydraulic Mount and Engine System,”SAE Techanical Paper #951348
Geisberger, A, 2000, “Hydraulic Engine Mount Modeling, Parameter Identification and Experimental Validation,”Master’s thesis, University of Waterloo, Canada
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
Jazer, G N and Golnaraghi, M F, 2002, “Nonlinear Modeling, Experimental Verification, and Theoretical Analysis of a Hydraulic Engine Mount,”Journal of Vibration and Control, Vol 8, pp 87–116
Kim, G and Singh, R, 1995, “A study of passive and Adaptive Hydraulie Engine Mount Systems with Emphasis on Non-lincar Characteristies,”Journal of Sound and Vibration, Vol 179, pp 427–453
Lee, K and Chor, Y, 1995, “Performance Analysis of Hydraulie Engine Mount by Using Bond Graph Method,”SAE Techanical Paper #951347
Margohs, D and Wilson, R, 1997, “Modeling Simulation and Physical Understanding of Hydromounts,”Master’s Thesis, University of California
Miller, L R. Ahmadian, M. Nobles, C M and Swanson, D A, 1995, “Modeling and Performance of an Experimental Active Vibration Isolator,”Trans AS ME Journal of Vibration and Acoustics, Vol 117, No 3A, pp 272–278
Royston, T and Singh, R, 1997, “Study of Nonlinear hydraulie Engine Mounts Focusing on Decoupler Modeling and Design,”SAE Techanwal Paper #971936
Seto, K, Sawatai, K, Nagamatsu, A, Ishihama, M and Dor, K, 1991, “Optimum Design Method for HydrauliE Mount,”SAE Techanwal Paper #911055
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
Suresh, N, Shankar, S and Bokil, V, 1994, “Develpoment of Idealistic Hydromount Characteristics to Minimize Engine Induced Vibrations Using Unconstrained Minimization,┌SAE Pa per #941741
Swanson, D A, 1993, “Active Engine Mounts for Vehicles,”SAE Paper #932432
Tao, J S, Liu, G R and Lam, K Y, 2000, “Design Optimization of Marine Engine-Mount System,”Journal of Sound and Vibration, Vol 235, No 3, pp 477–494
The Mathworks Inc Version 2 1 (Release 12),Optimization Toolbox for Use with Matlab
Ushijima, T, Takano, K and Kojima, H, 1988, “High Perfotmance Hydraulic Mount for Improving Vehicle Noise and Vibration,”SAE Techanwal Paper #880073
Vahdati, N, 1999, “Incorporation of TV As on Soft Structures to Improve Vibration Isolation,”Asia-Pacific Vibration Conference ’99, Singapoie, December 1999
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
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
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Ahn, Y.K., Song, J.D., Yang, BS. et al. Optimal design of nonlinear hydraulic engine mount. J Mech Sci Technol 19, 768–777 (2005). https://doi.org/10.1007/BF02916125
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF02916125