Abstract: Based on the working principle of vehicle disc brake system, a reduced disc brake dynamometer test bench was developed. An experimental study of brake vibration and noise was performed in this self-developed disc brake dynamometer. Moreover, a numerical analysis was performed by using Abaqus/Explicit to simulate the experimental process and investigate the relationship among the friction heat, interfacial wear and system stability. Both the experimental and numerical results showed that the friction system of brake pad on disc generated intermittent high frequency vibration and squeal noise during the friction process. The contact pressure of brake pad concentrated on the leading and trailing areas of the pad surface, which resulted in the high temperature and consequently local severe wear of these areas. Moreover, the vibration amplitude for the finite element model with thermal effect was lower compared to the model without thermal effect.

Key words: vehicle; disc brake system; friction heat; vibration; wear behavior; finite element analysis