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基于传热学和有限元理论,通过有限元软件对列车车轮的温度场进行模拟仿真,并通过对城市轨道交通车辆实际制动过程分析研究,建立了列车车轮的三维有限元模型,对车轮在不同制动初速度、减速度条件下的三维瞬态温度场进行仿真分析。从车轮材料所能承受的耐热极限方面研究了车轮温度场分布,即:车轮在初速度50～60km/h不同制动减速度条件下,连续往返运行一个来回,车轮的温度场满足材料的性能要求;在初速度80km/h不同减速度下连续制动后,车轮的最高温度会超过材料的耐热极限。从而得出能够满足列车行驶安全的制动初速度、减速度条件。
Based on the theory of heat transfer and finite element, the temperature field of the train wheel was simulated by finite element software. Through the analysis of the actual braking process of the urban rail transit vehicle, the three-dimensional finite element model of the train wheel was established. The three-dimensional transient temperature field under different deceleration and deceleration conditions is simulated. The wheel temperature field distribution is studied from the heat-resistant limit of the wheel material. That is, the wheel runs continuously round-trip at a speed of 50-60 km / h with a deceleration of 50-60 km / h. The temperature field of the wheel meets the requirements of the material Performance requirements; After the initial deceleration of 80km / h under different deceleration continuous braking, the maximum temperature of the wheel will exceed the heat-resistant limit of the material. The result shows that the braking initial speed and deceleration condition can meet the requirement of train safety.