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http://dx.doi.org/10.5050/KSNVE.2013.23.6.553

Variability Analysis of Dynamic Characteristics in Rubber Engine Mounts Considering Temperature Variation  

Hwang, In Seong (Mechanical Engineering, Dongeui University)
Ahn, Tae Soo (Center of Industrial Technology, Dongeui University)
Lee, Dooho (Mechanical Engineering, Dongeui University)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.23, no.6, 2013 , pp. 553-562 More about this Journal
Abstract
Vehicle vibrations arise from engine and road surface excitations. The engine mount system of a passenger car sustains the engine weight and insulates the excitation force from the engine system. The dynamic properties of viscoelastic material used for the vehicle engine mounts have large variation due to environmental factors such as environmental temperature and humidity etc. The present study aims to investigate the variability of dynamic characteristics in rubber engine mounts considering both environmental temperature change and material model errors/uncertainty. The engine mounts for a passenger car were modeled using finite element method. Then, the dynamic stiffness variability of the engine mounts were estimated using Monte Carlo simulation method. In order to estimate the variations in the storage and loss moduli of the viscoelastic materials, the material properties of the synthetic rubber were expressed as a fractional-derivative model. Next, in order to simulate the uncertainty propagation of the dynamic stiffness for the engine mounts due to the storage and loss moduli variations, the Monte Carlo simulation was used. The Monte Carlo simulation results showed large variation of the engine-mount stiffness along frequency axis.
Keywords
Engine Mount System; Viscoelastic Material; Temperature Variation; Dynamic Stiffness;
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Times Cited By KSCI : 2  (Citation Analysis)
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1 Baber, T. T., Maddox, R. A. and Orozco, C. E., 1998, Finite Element Model For Harmonically Excited Viscoelastic Sandwich Beams, Computer & Structures, Vol. 66, No. 1, pp. 105-113.   DOI   ScienceOn
2 Jones, D. I. G., 2001, Handbook of Viscoelastic Vibration Damping, Wiely, New York.
3 Youn, B. D., Xi, Z. and Wang, P., 2008, Eigenvector Dimension Reduction(EDR) Method for Sensitivity Free Probability Analysis, Structural and Multi disciplinary Optimization, Vol. 37, No. 1, pp. 13-28.   DOI   ScienceOn
4 Kim, S. Y. and Lee, D. H., 2006, Identification of Fractional-derivative-model Parameters of Viscoelastic Materials Using an Optimization Technique, Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 16, No. 12, pp. 1192-1200.   과학기술학회마을   DOI   ScienceOn
5 Lee, D. H. and Hwang, I. S., 2011, Analysis on the Dynamic Characteristics of a Rubber Mount Considering Temperature and Material Uncertainties, Computational Structural Engineering Institute of Korea, Vol. 24, No. 4, pp. 383-390.   과학기술학회마을
6 Rao, M. D., 2003, Recent Application of Viscoelastic Damping for noise Control in Automobile and Commercial Airplanes, Journal of Sound and Vibration, Vol. 262, No. 3, pp. 457-474.   DOI   ScienceOn
7 Nakata, B. C., 1998, Vibration Control in Machines and Structures Using Viscoelastic Damping, Journal of Sound and Vibration, Vol. 211, No. 3, pp. 449-465.   DOI   ScienceOn
8 Kim, S. Y. and Lee, D. H., 2009, Identification of Fractional Derivative Model Parameters of Viscoelastic Materials from Measured FRFs, Journal of Sound and Vibration, Vol. 324, No. 3-5, pp. 570-586.   DOI   ScienceOn
9 Lin, T. R., Rarag, N. H. and Pan, J., 2005, Evaluation of Frequency Dependent by Impact Test, Applied Acoustic, Vol. 66, No. 7, p. 829.   DOI   ScienceOn
10 Goh, Y., Booker, J. and McMaho, C., 2005, Uncertain Modeling of a Suspension unit, Proceeding of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, Vol. 219, No. 6, pp. 755-771.   DOI   ScienceOn
11 Jung, B. C., Lee, D. H. and Youn, B. D., 2009 Optimal Design of constrained-layer Damping Structures Considering Material and Operational Condition Variability, AIAA Journal, Vol. 47, No. 12, pp. 2285-2295.
12 Pritz, T., 2001, Loss Factor Peak of Viscoelastic Materials: Magnitude to Width Relations, Journal of Sound and Vibration, Vol. 246, No. 2, pp. 264-280.
13 Suarez, L. E., Shokiih, A. and Arroyo, J., 1997, Finite Element Analysis of Beams with Constrained Damping Treatment Modeled via Fractional Derivatives, Applied Mechanics Reviews., Vol. 50, No. 11, Part 2, pp. 216-224.   DOI   ScienceOn