双金属鼓式制动器高温工况的试验与仿真  

Experiments and simulations of bimetal drum brakes at high temperature conditions

作　　者：边疆 王晓颖 桂良进[1] 范子杰[1] BIAN Jiang;WANG Xiaoying;GUI Liangjin;FAN Zijie(School of Vehicle and Mobility,Tsinghua University,and State Key Laboratory of Automobile Safety and Energy,Beijing 100084,China)

机构地区：[1]清华大学车辆与运载学院,和汽车安全与节能国家重点实验室,北京100084

出　　处：《汽车安全与节能学报》2021年第2期173-179,共7页Journal of Automotive Safety and Energy

基　　金：国家自然科学基金资助项目(51475255);清华大学校企合作项目(20192002040)。

摘　　要：对于某重型卡车的双金属鼓式制动器,在近500℃高温工况下,进行了台架试验,测量了制动器在制动过程中的动态应变和动态温度特性。采用ABAQUS有限元(FE)软件,进行了热-应力-磨损耦合仿真分析。结果表明:制动鼓外表面的周向应变呈现近似周期性的交变特性;周向为制动鼓的主要变形方向,最大周向应力出现在开口边缘处;摩擦片的磨损量分布极不均匀。验证了该双金属鼓式制动器有限元计算模型的准确性,试验与仿真结果可为鼓式制动器的失效分析和结构优化提供基础。A bench test was carried out at high temperature working conditions of nearly 500℃for a bimetal drum brake of a heavy truck to explore the dynamic characteristics in the working process of the brake.Measured the dynamic strains and the dynamic temperature properties for the brake during braking.Conducted thermal-stress-wear coupling analysis by using a finite element(FE)software ABAQUS.The results show that the circumferential strain on the brake drum outer surface exhibits an approximately periodic alternating characteristic.The circumferential direction is the main deformation direction of the brake drum,and the maximum circumferential stress appears at the opening edge.The friction lining wear distribution is extremely uneven.These results verify the good accuracy of the bimetal drum brake FE model,which can be used as a basis of the failure analysis and structural optimization for bimetal drum brakes.

关 键 词：汽车安全 双金属鼓式制动器 高温工况 动态应变 动态温度 有限元(FE)软件 

分 类 号：U467.523[机械工程—车辆工程]