International Journal of Automotive Technology

The Korean Society of Automotive Engineers (한국자동차공학회)
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SIMPLE MODELS TO INVESTIGATE THE EFFECT OF VELOCITY DEPENDENT FRICTION ON THE DISC BRAKE SQUEAL NOISE

  • Shin, K. (School of Mechanical Engineering, Andong National University) ;
  • Brennan, M.J. (Institute of Sound and Vibration Research, University of Southampton) ;
  • Joe, Y.G. (School of Mechanical Engineering, Hanyang University) ;
  • Oh, J.E. (School of Mechanical Engineering, Hanyang University)
  • Published : 2004.03.01
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Abstract

This paper suggests two simple two-degree-of-freedom models to describe the dynamical interaction between the pad and the disc of a disc brake system. Separate models for in-plane and out -of-plane vibration are described. Although a brake pad and disc have many modes of vibration, the interaction between a single mode of each component is considered as this is thought to be crucial for brake noise. For both models, the pad and the disc are connected by a sliding friction interface having a velocity dependent friction coefficient. In this paper, it is shown that this friction model acts as negative damping in the system that describes the in-plane vibration, and as negative stiffness in system that describes the out-of-plane vibration. Stability analysis is performed to investigate the conditions under which the systems become unstable. The results of the stability analysis show that the damping is the most important parameter for in-plane vibration, whereas the stiffness is the most important parameter for the out-of-plane vibration.

Keywords

References

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