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Article

An Efficient Technique for Design of Hydraulic Engine Mount via Design Variable-Embedded Damping Modeling

[+] Author and Article Information
Jun-Hwa Lee, Kwang-Joon Kim

Center for Noise and Vibration Control, Department of Mechanical Engineering, KAIST, Science Town, Daejeon, 305-701, Korea

J. Vib. Acoust 127(1), 93-99 (Mar 21, 2005) (7 pages) doi:10.1115/1.1855930 History: Received January 21, 2003; Revised March 31, 2004; Online March 21, 2005
Copyright © 2005 by ASME
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References

Yu,  Y., Naganathan,  N. G., and Dukkipati,  R. V., 2001, “A Literature Review of Automotive Vehicle Engine Mounting Systems,” Mech. Mach. Theory, 36, pp. 123–142.
Brach, R. M., and Haddow, A. G., 1993, “On the Dynamic Response of Hydraulic Engine Mounts,” SAE Paper 931321.
Bernuchon, M., 1984, “A New Generation of Engine Mounts,” SAE Paper 840259.
Flower, W. C., 1985, “Understanding Hydraulic Mounts for Improved Vehicle Noise, Vibration, and Ride Qualities,” SAE Paper 850975.
Ushijima, T., Takano, K., and Kojima, H., 1988, “High Performance Hydraulic Mount for Improving Vehicle Noise and Vibration,” SAE Paper 880073.
Singh,  R., Kim,  G., and Ravindra,  P. V., 1992, “Linear Analysis of Automotive HydroMechanical Mount With Emphasis on Decoupler Characteristics,” J. Sound Vib., 158(2), pp. 219–243.
Colgate,  J. E., Chang,  C.-T., Chiou,  Y.-C., Liu,  W. K., and Keer,  L. M., 1995, “Modeling of a Hydraulic Engine Mount Focusing on Response to Sinusoidal and Composite Excitations,” J. Sound Vib., 184(3), pp. 503–528.
Kim,  G., and Singh,  R., 1993, “Nonlinear Analysis of Automotive Hydraulic Engine Mount,” ASME J. Dyn. Syst., Meas., Control, 115, pp. 482–487.
Golnaraghi,  M. F., and Jazar,  G. N., 2001, “Development and Analysis of a Simplified Nonlinear Model of a Hydraulic Engine Mount,” J. Vib. Control, 7, pp. 495–526.
Geisberger,  A., Khajepour,  A., and Golnaraghi,  F., 2002, “Nonlinear Modeling of Hydraulic Mounts: Theory and Experiment,” J. Sound Vib., 249(2), pp. 371–397.
Lee, Y. W., 1995, “Dynamic Analysis and Design of Active Engine Mount Using Magnetic Actuator,” M.S. thesis, Dept. of Mech. Eng., KAIST, Daejeon, Korea.
Lee, J. H., Bae, M. S., and Kim, K. J., 2003, “Limitations of Mechanical Model With Lumped Mass in Representing Dynamic Characteristics of Hydraulic Mount,” SAE Paper 2003-01-1466.
Kim, C. S., 1989, “Dynamic Analysis of Hydraulic Engine Mount,” M.S. thesis, Dept. of Mech. Eng., KAIST, Daejeon, Korea.
Ushijima, T., and Dan, T., 1986, “Nonlinear B.B.A. for Predicting Vibration of Vehicle With Hydraulic Engine Mount,” SAE Paper 860550.
White, F. M., 1999, Fluid Mechanics, 4th Ed., McGraw–Hill, New York.
Merritt, H. E., 1967, Hydraulic Control Systems, Wiley, New York.
Luenberger, D. G., 1969, Optimization by Vector Space Methods, Wiley, New York.
Crandall,  S. H., 1970, “The Role of Damping in Vibration Theory,” J. Sound Vib., 11(1), pp. 3–18.
Wineman, A. S., and Rajagopal, K. R., 2000, Mechanical Response of Polymers, Cambridge University Press, Cambridge, UK.
Gau, S. J., and Cotton, J. D., 1995, “Experimental Study and Modeling of Hydraulic Mount and Engine System,” SAE Paper 951348.

Figures

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Cross-sectional view of hydraulic mount
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Measurements of complex stiffness of hydraulic mount
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Hydraulic model of hydraulic mount
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Complex stiffness computed by nonlinear model
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Equivalent damping coefficient function ce(ω) at amplitude of 1 mm
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Complex stiffness computed by linear model
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Complex stiffness predicted and curve fitted by proposed formula
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Key frequency points of complex dynamic stiffness
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Magnitudes of real part at key frequencies
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Slope of real part and magnitude of imaginary part at hydraulic resonance frequency
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Contribution of design variables to equivalent viscous damping coefficient ce
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Effect of modification of bulk modulus of main rubber kb
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Effect of modification of piston area Ap
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Effect of modification of cross-sectional area of fluid track At
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Effect of modification of length of fluid track Lt

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