制动防抱死工况制动器热机耦合特性仿真分析  

Computational Investigation into Thermal-mechanical Coupling Characteristics of Disc Brake under Anti-lock Braking Condition

作　　者：张立军[1] 何臻[1] 孟德建[1] 

机构地区：[1]同济大学汽车学院,上海201804

出　　处：《系统仿真学报》2016年第3期610-619,626,共11页Journal of System Simulation

基　　金：国家自然科学基金(51175380)

摘　　要：制动工况对制动器的热机耦合特性具有重要影响。建立了三自由度汽车制动动力学模型,制动力由采用滑移率逻辑门限值控制策略的制动防抱死系统(ABS,Anti-lock Brake System)控制,对干路面和湿路面的制动防抱死工况仿真,同时对相应路面非制动防抱死工况仿真,用于比较分析;建立通风盘式制动器热机耦合有限元动力学模型,对不同制动工况制动盘和制动块的热机耦合特性进行仿真,分析了制动防抱死工况制动器热机耦合特性,并通过与非制动防抱死工况比较,探究ABS对制动器热机耦合特性影响。经分析发现,制动防抱死系统引起的制动压力变化以及制动摩擦热功率改变将对热机耦合特性各个指标产生影响。The braking condition has great influence on the thermal-mechanical coupling characteristics of disc brake. A three-degree-of-freedom dynamic model of braking vehicle was built. The braking force was determined by an anti-lock braking system （ABS） which adopted the threshold-logical control strategy of wheel slip rate. With the model, anti-lock braking processes on dry and wet were simulated. In the meantime, for the sake of comparison, non-anti-lock braking processes were simulated on corresponding road. A thermal-mechanical coupling finite element model of a ventilated disc brake was established. Thermal-mechanical coupling characteristics of brake disc and brake lining were calculated under different braking conditions, and the characteristics under anti-lock braking condition were analyzed. The effects of ABS on the characteristics of the brake were studied through comparison with non-anti-lock braking condition. Through analysis, it is found that the variation of braking pressure and the difference in braking frictional thermal power due to ABS control will significantly affect the brake＇s thermal-mechanical coupling characteristics.

关 键 词：热机耦合特性 制动防抱死系统 制动工况 通风盘式制动器 

分 类 号：U463.51[机械工程—车辆工程]