摘要
针对在已有的制动盘瞬态温度场模拟中,摩擦表面摩擦生热热流密度的计算没有考虑摩擦热流在摩擦面上分布的差异,提出用摩擦功率法及摩擦副周向接触长度确定制动盘摩擦面摩擦生热热流密度的方法。根据温度场分析时的载荷和边界条件,建立制动初速200 km.h-1条件下列车紧急制动过程中制动盘瞬态温度场的有限元模型并进行数值分析,结果表明:在制动过程中,制动盘高温区域集中在制动盘摩擦半径至外径区域,温度最高可达289.9℃;摩擦热流对盘体内径附近区域的影响较小;能反映出制动盘和闸片周向接触长度径向分布对制动盘表面温度场分布产生的影响。
In the informed simulation of transient temperature field of brake discs, the distribution difference of the friction heat flux on the friction surfaces has not been considered to calculate the heat flux generated by friction. Aimed on the problem, a method was researched and proposed based on the friction power and circumferential contact length between the brake disc and pad. According to the necessary loads and the boundary conditions for temperature field analysis, the FEM transient temperature field model of a brake disc was established and the numerical analysis of an emergency braking process of the train at the initial velocity of 200 km · h^-1 was carried through. The calculation results show that the high temperature sections are located from the friction radius to outside diameter on the friction surface during the simulation of the braking process, the maximum temperature can reach 289.9 ℃, and the heat flux has little impact on the regions close to inside diameter. The new method can reflect the impact of the circumferential contact length between the discs and pads on the temperature distribution.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2010年第1期99-104,共6页
China Railway Science
基金
北京市科技计划研发攻关项目(Z090103008309010)
关键词
制动盘
温度场
摩擦功率法
有限元
模拟计算
Brake disc
Temperature field
Friction power method
Finite element
Simulation
