制动盘设计及流热固耦合分析

Design of Brake Disc and Fluid-thermal-solid Coupling Analysis

在中国大学生电动方程式汽车大赛中,需要车手进行多次制动,制动系统的抗热衰退能力直接影响赛车的稳定性和车手的生命安全。以大赛规则为背景设计了制动盘,通过有限元软件ANSYS对制动盘进行拓扑优化;建立多物理场耦合模型,并对制动盘的温度场进行仿真分析。结果表明:在赛车紧急制动时,摩擦块与制动盘表面接触产生局部高温,最高温度为190.6℃且高温区呈条带状分布;优化后的制动盘,其最高温度较旧方案降低11.1%,质量降低19.08%。

In the Formula Student Electric China(FSEC),the driver needs to brake many times.The heat resistance of the braking system directly affects the stability of the racing car and the safety of the driver.The brake disc based on competition rules was designed.Through the finite element software ANSYS,the topology optimization of the brake disc was carried out.A multi-physical field coupling model was established to simulate and analyze the temperature field of the brake disc.The result shows that the local high temperature is produced when the friction plate contacts with the brake disc during the emergency braking of the racing car,the maximum temperature is 190.6℃,and the high temperature zone is banded distribution.The maximum temperature of the optimized brake disc is 11.1%lower than that of the old scheme,and the mass is reduced by 19.08%.