Friction-Induced Instabilities in a Disk Brake Model
作者单位：Institut für technische Mechanik Universitāt KarlsruheD-76128 KarlsruheGermany Institut für technische Mechanik Universitāt KarlsruheD-76128 KarlsruheGermany
会议名称：《第十一届IFTOMM世界大会》
会议日期：2004年
学科分类：08[工学] 080203[工学-机械设计及理论] 0802[工学-机械工程]
关 键 词：Brake Noise Structural Model Friction Heating Instabilities
摘 要：正The dynamics of a structural car brake model is examined to explain brake noise by friction-induced instabilities including thermal effects. The rotating brake disk is modeled as a ring with two pads considered as rigid bodies which are in a one-point contact with the ring. Each pad is viscoelastically suspended in axial and circumferential direction and loaded with a constant brake load. At the two contact points, heat is fed into the thermoelastic ring which is proportional to the power of the two friction forces. After discretizing the governing boundary value problem by a modal expansion technique, a highly nonlinear system of ordinary differential equations is obtained. It forms the starting point of the stability analysis showing instabilities for high and for low driving speed responsible for brake noise. Several suggestions are made to obtain stable operation conditions without noise.