关键词: 瞬态温度场；盘式制动器；热敏感性材料；接触压力；摩擦系数

Abstract: In order to accurately predict the temperature field distribution of braking system under actual working conditions, the pressure-dependent frictional coefficient, temperature-dependent thermophysical properties of materials, contact pressure increasing exponentially with time, and braking speed are considered comprehensively. The thermal characteristic of disc brake during single braking is studied by using finite element method, and the braking time, braking distance, and transient temperature field distribution under different contact pressure are obtained. The results show that the temperature of the brake disc rises and then decreases during the process of braking. The smaller the contact pressure, the longer the braking time and braking distance, and the smaller the temperature rise. The temperature of the brake disc fluctuates in a zigzag pattern, and the amplitude of the fluctuation increases first and then decreases. The research results provide a theoretical basis for the accurate prediction of braking performance and have certain practical value in engineering.

Key words: Transient temperature field; Disc brake; Thermal sensitive material; Contact pressure; Frictiona coefficient