Abstract
According to the statistics, 75 percent of the city noise is the traffic noise, and car noise accounted for 85 percent of them, screaming and vehicle vibration quavery is an important component of the car noise when braking. Automotive brake noise has become a public hazard which can not be ignored in modern city life.
The article has researched into disc brake, and it is based on the damping role of vibration and noise reduction technology, started with the friction materials’ design and friction damping characteristics of the film, and used the methods of theoretical analysis (brake torque, equation of motion, etc.) , and combination with the finite element calculation, and then to analysis the friction pad and film viscoelastic vibration modal, and finally to explore the effect of friction material viscoelastic on disc brake-shoe’s vibration and braking noise.