An Efficient Approach to Estimate Critical Value of Friction Coefficient in Brake Squeal Analysis

Author:

Huang Jinchun1,Krousgrill Charles M.1,Bajaj Anil K.1

Affiliation:

1. School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907-2088

Abstract

Automotive brake squeal generated during brake applications has become a major concern in automotive industry. Warranty costs for brake noise related complaints have been greatly increasing in recent years. Brake noise and vibration control are also important for the improvement of vehicle quietness and passenger comfort. In this work, the mode coupling instability mechanism is discussed and a method to estimate the critical value of friction coefficient identifying the onset of brake squeal is presented. This is achieved through a sequence of steps. In the first step, a modal expansion method is developed to calculate eigenvalue and eigenvector sensitivities. Different types of mode couplings and their relationships with possible onset of squeal are discussed. Then, a reduced-order characteristic equation method based on the elastically coupled system eigenvalues and their derivatives is presented to estimate the critical value of friction coefficient. The significance of this method is that the critical value of friction coefficient can be predicted accurately without the need for a full complex eigenvalue analysis, making it possible to determine the sensitivity of system stability with respect to design parameters directly.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics

Reference17 articles.

1. Liles, G. D. , 1989, “Analysis of Disc Brake Squeal Using Finite Element Methods,” SAE Paper No. 891150.

2. Guan, D., and Jiang, D., 1998, “A Study on Disc Brake Squeal Using Finite Element Methods,” SAE Paper No. 980597.

3. An Analytical Approach to Model Disc Brake System for Squeal Prediction;Chowdhary

4. Servis, B. K. , 2000, “The Onset of Squeal Vibrations in Drum Brake Systems Resulting From a Coupled Mode Instability,” Ph.D. dissertation, Purdue University, West Lafayette, IN.

5. Hamabe, T., Yamazaki, I., Yamada, K., Matsui, H., Nakagawa, S., and Kawamura, M., 1999, “Study of a Method for Reducing Drum Brake Squeal,” SAE Paper No. 1999–01–0144.

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