鼓式制动器动态应变和温度特性试验研究与分析  

EXPERIMENTAL INVESTIGATION AND ANALYSIS ON DYNAMIC STRAIN AND TEMPERATURE OF DRUM BRAKE

作　　者：王晓颖 范子杰[1] 王青春[2] 桂良进[1] WANG Xiao-ying;FAN Zi-jie;WANG Qing-chun;GUI Liang-jin(State Key Laboratory of Automotive Safety and Energy,Tsinghua University,Beijing 100084,China;College of Technology,Beijing Forestry University,Beijing 100083,China)

机构地区：[1]清华大学汽车安全与节能国家重点试验室,北京100084 [2]北京林业大学工学院,北京100083

出　　处：《工程力学》2018年第10期222-228,237,共8页Engineering Mechanics

基　　金：国家自然科学基金项目(51475255)

摘　　要：鼓式制动器的工作过程存在着强烈的摩擦学-传热学-机械学耦合行为,其动态受载状态研究是分析制动器制动特性、进行疲劳寿命评估和结构优化设计的重要基础。该文以某重型卡车的鼓式制动器动态特性为研究对象,设计试验获得了两种制动工况下制动鼓外表面的动态应变和摩擦表面的温度变化,并采用有限元软件ABAQUS进行了考虑磨损的热机耦合仿真分析。结果表明,制动鼓局部与制动蹄不同位置接触时应变呈现极度不均匀的特征,且相似的一组四个波峰在随制动鼓的旋转重复出现。随着温度升高,热应变对制动鼓的平均应变状态影响显著。The working process of drum brakes involves strong thermo-mechanical and tribological coupling behaviors.The research on the dynamic strain of a drum brake is of great significance to its performance analysis,structure optimization and fatigue prediction.A new test procedure is proposed to investigate the dynamic behaviors of a working drum.The strain-time properties and temperature-time properties of the friction surface of the drum are studied respectively.Thermo-mechanical and tribological coupling analysis is conducted by using software ABAQUS as well.The results show that the strain is uneven in different deformation status when the drum contact different zones of friction plates,and that a set of four wave crests is repeated.Meanwhile,thermal effect is proved significant to its mean strain status.

关 键 词：鼓式制动器 动态应变 有限元 温度 磨损 

分 类 号：U467.511[机械工程—车辆工程]