Numerical solution for vibration behavior of automotive brake disc and pads
1.School of Traffic and Vehicle Engineering， Shandong University of Technology, Zibo， Shandong 255049， China； 2.School of Automotive Engineering， Tongji University， Shanghai 201804， China）
Abstract：To reduce or eliminate brake groan, the vibration characteristics and influence factors of the system with brake disk and pads were investigated. Considering the stiffness and damping between brake disk and pads as well as the tangent and normal vibrations, a nonlinear dynamic model with six degree freedoms was established. The parameters from numerical analysis were substituted into Jaccobi matrix, and the eigenvalues were obtained by Matlab. System stability at the balance point was analyzed with the RouthHurwitz criterion. Effects of normal load to brake disk and initial velocity on system vibration characteristics were investigated with numerical method. The results show that the system with given parameters is unstable at balance point, and the tangent and normal vibrations tend to become weak or vanish when initial velocity of the brake disk increases.However，the vibrations increase when brake load increases.
2011, Vol. 32 
