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The Use of Unique Time History Input Excitation in the Dynamic Characterization of Automotive Mounts
Technical Paper
2003-01-1463
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The traditional method of dynamic characterization of elastomers used in industry has largely been based on sinusoidal input excitation. Discrete frequency sine wave signals at specified amplitudes are used to excite the elastomer in a step-sine sweep fashion. This paper will examine new methods of characterization using various broadband input excitations. These different inputs include continuous sine sweep (chirp), shaped random, and acquired road profile data. Use of these broadband data types is expected to provide a more accurate representation of conditions seen in the field, while helping to eliminate much of the interpolation that is inherent with the classic discrete step-sine technique. Results of the various input types are compared in this paper with those found using the classic discrete step-sine input. One of the challenges lies in accurate reproduction of specific time histories, which is achieved using an iterative method in a hydraulic high-frequency elastomer test machine. This paper will elaborate on the time-history based method, as well as provide a description of accurate digital signal post-processing methods recommended for the various types of input.
Authors
Citation
Holt, J., Rao, M., Blough, J., and Gruenberg, S., "The Use of Unique Time History Input Excitation in the Dynamic Characterization of Automotive Mounts," SAE Technical Paper 2003-01-1463, 2003, https://doi.org/10.4271/2003-01-1463.Also In
SAE 2003 Transactions Journal of Passenger Cars - Mechanical Systems
Number: V112-6; Published: 2004-09-15
Number: V112-6; Published: 2004-09-15
References
- Harris, J. A. “Dynamic Testing Under Nonsinusoidal Conditions and the Consequences of Nonlinearity For Service Performance,” Proc. of American Chemical Society Rubber Division meeting Montreal, Quebec, Canada May 1997
- Harris, J. Stevenson, A. “On The Role of Nonlinearity In the Dynamic Behavior Of Rubber Components,” 3 rd IAVD Congress on Vehicle Design and Components 1986
- Turner, D. M. Boast, D. Marfell, M. “Changes in the Behaviour of Rubber Components as a Consequence of Real Road Conditions,” Paper C577/019/2000, Transactions of IMechE European Conference on Vehicle Noise and Vibration 2000
- Baldanzini, N. Caprioli, D. Pierini, M. “Designing the Dynamic Behavior or an Engine Suspension System Through Genetic Algorithms,” 480 486 Transactions of the ASME Journal of Vibration and Acoustics 2001
- Swayze, J. L. Bachrach, B. I. Shankar, S. R. “Suspension Force Optimization Using Quarter-car Model with Elastomeric Elements,” Paper 1999-01-1753, Proc. of SAE 1999 Noise and Vibrations Conf. 1999
- Kowalski, D. Rao, M. D. Blough, J. Gruenberg, S. “The Effects of Different Input Excitation on the Dynamic Characterization of an Automotive Shock Absorber,” Paper 2001-01-142, Proc. of SAE 2001 Noise and Vibrations Conf. 2001
- Wirkner, K. J. “The Dynamic Characterization of Elastomeric Materials,” Michigan Technological University 2001
- MTS 793.10 MultiPurpose TestWare Control Manual 793.31 Dynamic Characterization Process Operating Manual MTS Systems Corporation