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Prediction of Suspension Fundamental Mode Frequency with Extraction of Dynamic Properties of Automotive Shock Absorbers and Tire
Technical Paper
2001-01-0498
ISSN: 0148-7191, e-ISSN: 2688-3627
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Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
The automotive shock absorber has various functions in car performance. Particularly, it is a dominant tuning parameter to get good primary and secondary ride characteristics within 1-35Hz ranges in car development. Thus, understanding of characteristics of shock absorber in this frequency range is indispensable to both test and analysis engineers for an effective and systematic approach. In this study, tire is also investigated from the same point of view. Frequency dependent stiffness and damping coefficient are extracted by discrete sine swept test under constant velocity of 25, 50, 100mm/sec which represent typical road surface conditions[1]. The responses are analyzed on frequency domain and the basic theoretical background for this approach is introduced. Also, frequency dependent stiffness and damping coefficient of the shock absorber and tire are interpolated by 1st or 2nd order function of frequency and used for prediction of fundamental suspension mode frequency with simple calculation. The results of this calculation are compared with test results to verify its usefulness.
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Citation
Jeong, S. and Suh, J., "Prediction of Suspension Fundamental Mode Frequency with Extraction of Dynamic Properties of Automotive Shock Absorbers and Tire," SAE Technical Paper 2001-01-0498, 2001, https://doi.org/10.4271/2001-01-0498.Also In
References
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- Kageyama Ichiro Emoto Khoji “On a modeling of Shimmy Phenomenon for Two Wheeled Vehicle,” SAE Paper No. 951807
- Shao Z. A. “The Modal Testing and Analysis of Vehicle Rolling Tyres,” SAE Paper No. 945078
- Dihua Guan Weidong Wu Aiqian Zhang “Tire Modeling for Vertical Properties by Using Experimental Modal Parameters,” SAE Paper No. 980252