高速抱轨制动过程中摩擦片温度场研究

Temperature Field Analysis for Brake Pad in High-Speed Braking Program Holding the Rail

高速重载试验车摩擦片在抱轨制动过程产生的温度场是影响其安全运行的关键因素。基于某高速重载制动试验,采用传热学相关知识和有限元数值模拟技术,确定了制动过程中摩擦片热能和换热系数的计算方法,建立了摩擦片制动过程中的热传导模型,并利用ANSYS软件建立了摩擦片温度场三维仿真模型。通过仿真得到了制动过程中摩擦片的温度场动态分布规律,并得到了摩擦片数量配置与最大温度之间的关系,对制动试验前摩擦片初步配置具有指导意义。

The temperature field of brake pads in the braking holding rail is a key factor for the high-speed heavy test vehicle safe operation. Based on a braking test holding rail of the high-speed heavy test vehicle, a heat conduction model of brake pad was established according to the heat transfer theory and using the fi- nite element simulation technology. A 3 D thermal simulation model for the braking of brake pad was built by software ANSYS. Then the dynamic temperature field in the braking of brake pad was obtained. The relationship between the number of brake pads and the maximum temperature was obtained which is valuable for setting the initial number of brake pads before the real test.