|
|
International Journal of Automotive Technology 2004;5(1): 61-67. |
| SIMPLE MODELS TO INVESTIGATE THE EFFECT OF VELOCITY DEPENDENT FRICTION ON THE DISC BRAKE SQUEAL NOISE |
| K. SHIN1, M. J. BRENNAN2, Y. G. JOE3, J.-E. OH3 |
1Andong National University
2University of Southampton
3Hanyang University |
|
|
|
|
|
| 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. |
| Key Words:
Disc brake, Squeal, Stability analysis, Velocity dependent friction coefficient, Stick-slip, Negative damping, Negative stiffness |
|
|
|
Preview
Full text via DOI 
Download Citation 
Print 
