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Study on Disc Brake Groan
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English
Abstract
It is very important for the vehicle comfort quality to eliminate brake noise. The brake noise can be defined into two phenomena: One is the high-frequency brake squeal (frequency 1-15kHz), we have presented in 1989 SAE Congress(890864) * (2),and the another is the low-frequency brake groan (frequency 200-500Hz). In this paper,the brake groan has been discussed by constituting the theoretical model,in order to clarify the cause of disc brake groan noise. According to the previous study(3), the groan noise has been occurred by the increase of the disc temperature which has influenced on the disc width and the disc material. On the other hand, the groan noise can be observed in the condition of atmosphere temperature indeed. So that the precise phenomenon and cause should be defined. After observing the groan noise on the test bench, we have constructed the theoretical model and taken the numerical method. Finally we have obtained the equation representing the energy E,the increase of kinetic energy during one cycle of the system vibration. We have found that the groan noise has been generated under the condition of E > 0, and that the factors influencing on the groan noise,have been clarified by considering the above equation of E.
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Citation
Gouya, M. and Nishiwaki, M., "Study on Disc Brake Groan," SAE Technical Paper 900007, 1990, https://doi.org/10.4271/900007.Also In
References
- Nishiwaki M. Okamura H. “Study on Brake Noise” Trans.Japan Soc.Mech.Eng. 54 497 166 1988
- Nishiwaki M. Harada H. Okamura H. Ikeuchi T. “Study on Disc Brake Squeal” SAE Paper, 890864 1989
- Kreitlow, W. “Vibration and Hum of Disc Brakes under Load” SAE Paper, 850079 1985
- Bolotin, V.V. “The Dynamic Stability of Elastic Systems” Holden Day 1964
- Ziegler, h. “Principles of Structural Stability” Blaisdell 1968