某汽车盘式制动器设计与热力耦合分析

Design and Thermal Coupling Analysis of a Certain Automobile Disc Brake

摘要: 本文通过将整车性能参数与盘式制动器设计有机结合，针对某汽车盘式制动器进行设计。首先通过选定同步附着系数以及计算在制动过程中汽车各个车轮的制动力和制动力矩，确定了盘式制动器的主要部件关键设计参数和材料，并经计算验证了制动器各项性能均符合相关法规要求。其次利用CAD软件对主要零部件进行三维建模和组装。最后利用有限元分析软件ABAQUS，建立该制动器热力耦合有限元模型，考虑制动时制动盘和摩擦片的热膨胀系数以及弹性模量随温度的变化，利用完全耦合方法，对盘式制动器的紧急制动工况进行仿真模拟，得到了该工况下制动盘温度场和应力场分布特性，并对两者之间的耦合关系进行分析，验证了本文盘式制动器设计的可行性。

Abstract: This paper integrates the overall vehicle performance parameters with the design of a disc brake system for a specific automobile. Initially, by selecting the synchronous adhesion coefficient and calculating the braking forces and moments for each wheel during the braking process, key design parameters and materials for the disc brake system were determined. The calculated results confirmed that the performance of the brake system complies with relevant regulations. Subsequently, major components were modeled and assembled in three dimensions using CAD software. Finally, employing finite element analysis software ABAQUS, a thermal-structural coupled finite element model of the brake system was established. This model considered the thermal expansion coefficients of the brake disc and friction pads, as well as the variation of elastic modulus with temperature during braking. Utilizing a fully coupled approach, the disc brake system was simulated under emergency braking conditions. The simulation yielded characteristics of temperature distribution and stress field for the brake disc under such conditions. An analysis of the coupling relationship between these factors was conducted, confirming the feasibility of the disc brake system design proposed in this study.