【摘要】 以某乘用车前轮采用的通风盘式制动器为研究对象,建立其热-结构耦合的3维有限元分析模型.在此基础上采用直接耦合法对该通风盘式制动器在紧急制动工况下的瞬态温度场进行仿真分析,获得整个通风式制动盘和摩擦片在紧急制动过程中温度场的分布情况及变化特性.结果显示:在整个紧急制动过程中,制动盘温度场的分布不是轴对称的,其在径向、周向及轴向3个方向上均存在着一定的温度梯度;制动盘的最高温度出现在1.91 s,最高温度为227.1℃.同时对该通风盘式制动器进行了与仿真分析相同制动工况下的台架试验,所获得的实验结果与仿真计算结果基本一致,从而验证了仿真分析的有效性,为通风盘式制动器的设计及优化提供了理论基础.更多还原

【Abstract】 The ventilated disc brake which used in a passenger vehicle front wheel as the research object is set,its thermal-structure coupled three-dimensional finite element analysis model is set up. Then direct coupling method is adopt to simulate the transient temperature field of ventilated disc brake under emergency braking condition on the basis of model,eventually the distribution and change characteristics of temperature field of ventilated brake disc and pad in emergency braking are gotten. The results show that the temperature field distribution of brake disc is not axial symmetry in emergency braking,there are certain temperature gradient in radial,circumferential and axial three directions. The highest temperature of the brake disc appeared in 1. 91 s,the highest temperature is 227. 1 ℃.Meanwhile the ventilated disc brake bench test is carried on under the brake condition as same as the simulation analysis,the obtained experimental result basic consistent with the result of the simulation calculation,thus the validity of the simulation analysis is verified,and a theoretical basis for design and optimization of ventilated disc brake is provided.更多还原