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On the Wear Dependence of Low-Frequency and High-Frequency Brake Squeal
Technical Paper
2018-01-1902
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The dynamics of disc brakes, and in particular their NVH behavior, have long been the focus of research. Measurements by Rhee et al. show that brake pad wear has a significant influence on the occurrence of low and high frequency squealing [1]. It is suspected that low frequency squealing is more likely to occur when the wear difference between the inner and outer brake pads is high. If the two pads incur comparable wear, however, the prevalence of high frequency squealing increases.
In order to investigate this hypothesis, this paper focuses on a simplified model of a commercial brake system. First, the friction force between the inner pad and the disc is iteratively adjusted, while the force between the outer pad and the disc is held constant. In a second step, the inner pad’s wear is iteratively increased, while the wear on the outer pad remains unaffected. With the aid of the Complex Eigenvalue Analysis (CEA), the real part of the eigenvalue is used as a quantification measure in order to investigate the dependence between wear and high and low frequency squealing.
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Citation
Otto, J., Ostermeyer, G., and Rhee, S., "On the Wear Dependence of Low-Frequency and High-Frequency Brake Squeal," SAE Technical Paper 2018-01-1902, 2018, https://doi.org/10.4271/2018-01-1902.Data Sets - Support Documents
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References
- Lee , S. , Jeon , J. , Kim , S. , Kim , S. et al. A Study of Low-Frequency and High-Frequency Disc Brake Squeal SAE Int. J. Passeng. Cars - Mech. Syst. 9 3 1235 1244 2016 10.4271/2016-01-1944
- Abendroth , H. Advances/Progress in NVH Brake - Test Technology SAE Technical Paper 982241 1998 10.4271/982241
- Ostermeyer , G.-P. On Tangential Friction Induced Vibrations in Brake Systems SAE Int. J. Passeng. Cars - Mech. Syst. 1 1 1251 1257 2009 10.4271/2008-01-2580
- Lee , S. , Jeon , J. , Kim , S. , Kim , S. et al. Brake Squeal and Disc Metallurgy Variability: Importance of Disc Wear SAE Technical Paper 2014-01-2491 2014 10.4271/2014-01-02491
- Ostermeyer , G. , Otto , J. , and Rhee , S. In-Plane and Out-of-Plane Vibrations of Brake Linings on the Rotor SAE Technical Paper 2017-01-2530 2017 10.4271/2017-01-2530