On the Wear Dependence of Low-Frequency and High-Frequency Brake Squeal
Published October 5, 2018 by SAE International in United States
Downloadable datasets for this paper availableAnnotation of this paper is available
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 . 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.
CitationOtto, 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
|[Unnamed Dataset 1]|
- 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, doi:10.4271/2016-01-1944.
- Abendroth, H., “Advances/Progress in NVH Brake - Test Technology,” SAE Technical Paper 982241, 1998, doi: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, doi: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, doi: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, doi:10.4271/2017-01-2530.