摘要
以CRH380BL型高速动车组的动车转向架上轴盘制动为研究对象,基于摩擦功率方法,对轴盘进行热负荷仿真研究及边界条件的确定。利用ANSYS软件,对动车组在350 km/h紧急制动过程中,制动盘的三维瞬态温度场在径向、轴向以及深度方向上的分布情况进行仿真,并从制动盘所能承受的最高温度方面分析其制动能力。结果表明:轴盘摩擦表面在制动初期温度呈环状分布,由于散热筋具有良好的散热功能,随后在散热筋之间的摩擦环面上产生不断地向周围扩散的团状高温区;制动后期,制动盘的温度呈层状分布,温度从制动盘的上表面自上而下递减,同时温度随着靠近轴盘轴心孔位置而渐渐降低,这表明轴盘制动过程中轴盘的温度分布受轴盘结构的影响。
Based on the friction power method,the thermal load simulation and boundary condition of the CRH380BL type high speed EMU(Electric multiple unit)are studied.The ANSYS software is used to simulate the distribution of the 3D transient temperature field in the radial,axial and deep direction of the brake disc during the emergency braking process of 350 km/h,and the braking capability is analyzed from the highest temperature that the brake disc can bear.The results show that the friction surface of the shaft disk has a circular distribution at the initial stage of braking,because the radiation rib has a good heat dissipation function,and then the cluster of high temperature area is produced on the friction ring between the cooling ribs;and next,the temperature of the brake disc is layered and the temperature decrease progressively from the upper surface to down surface of the brake disc.At the same time,the temperature decreases gradually,and the temperature decreases with the position of the axle center hole.Results indicate that the temperature distribution of the shaft disc is influenced by the shaft disk structure during the shaft disc braking process.
作者
乔磊
马军
张嘉鹭
Qiao Lei;Ma Jun;Zhang Jialu(College of Mechanical and Electrical Engineering,Jiangsu Normal University,Jiangsu Xuzhou 221116,China)
出处
《机械科学与技术》
CSCD
北大核心
2018年第12期1956-1962,共7页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(51705223)
江苏省教育科学"十三五"规划重点课题(B-a/2016/01/14)
国家级大学生创新创业训练计划项目(201710320033)资助
关键词
有限元法
动车组
轴盘制动
温度场
finite element method
EMU
axle disc brake
temperature field
