动车制动盘温度场和热应力场的耦合分析

摘要

随着高速列车运行速度的不断提高,紧急制动时制动盘的温度急剧增加,对其性能要求越来越高.根据传热学原理建立了高速列车动车制动盘的热-结构耦合模型,利用ANSYS软件对350 km/h动车组动车制动盘在紧急制动工况下的温度场和热应力场进行耦合仿真分析.结果表明:在57 s左右时,温度达到最大值418℃,满足锻钢对温度性能的要求；在50 s左右时,应力达到最大值772MPa,满足锻钢对强度性能的要求.仿真分析结果可作为制动盘设计和选材的参考依据.%With the speed of high-speed train continuously increasing,the temperature of brake discs increases sharply when the train takes emergency braking. Therefore, the performance demand for brake disc is higher and higher. According to heat transfer principle, the coupling model of hot-structure is established for brake disc on power car of high-speed train. With ANSYS finite element software,the value of temperature and thermal stress fields for brake disc on power car of high-speed train is simulated in emergency braking. Simulation results show the following: in about 57 s, brake disc will reach the max temperature of 418 ℃. It meets the performance of forging steeL And in about 50 s,brake disc will reach the max stress of 772 Mpa. And it satisfies the strength requirements. The simulation result can provide the reference for brake disc design and material.