干摩擦诱发汽车制动系统颤振时多极限环特性  

Study on Dry Friction Induced Multiple Limit-Cycle Patterns in Automotive Brake Groan

作　　者：史伟[1] 魏道高[1] 胡美玲[1] 潘之杰[2] 陈浙伟 

机构地区：[1]合肥工业大学机械与汽车工程学院,安徽合肥230009 [2]浙江吉利汽车研究院有限公司,浙江杭州311228 [3]安徽万安汽车零部件有限公司,安徽合肥231137

出　　处：《汽车工程学报》2015年第1期35-42,共8页Chinese Journal of Automotive Engineering

基　　金：国家自然科学基金资助项目(51375130)

摘　　要：制动初速度、制动压力和摩擦因数是影响制动干摩擦力的主要参数,而制动盘与制动块之间的干摩擦力是可能诱发制动颤振时出现多极限环的主要原因。通过建立制动器系统单自由度模型,结合Wojewoda迟滞环摩擦力模型,寻找构成干摩擦力的3个参数诱发多极限环特性机理。基于上述模型数值计算结果表明,在一组参数组合下出现了多极限环,而且随着制动初速度的减小,稳定极限环的幅值增加,不稳定极限环幅值减小;随着制动压力的增加,稳定极限环与不稳定极限环的幅值均增加;随着动摩擦因数增加,稳定极限环的幅值增加。The initial braking velocity, pressure and friction coefficients are the main parameters affecting the braking dry-friction.The dry friction between the brake disc and brake pad is the main cause of limitcycle patterns inbrake groan.Combined with Wojewoda＇s hysteresis loop friction model, a single degree of freedom mathematical model of the brake system was established to find the mechanism of multiple limit cycles induced by dry friction. Based on the above-mentioned models, the numerical calculation results show that, the multiple limit cycle patternsare found in a group of parameters. And with the decrease in the initial braking velocity and the increase in the amplitude of stable limit cycle, the amplitude of unstable limit cycle decreases. With the increase in brake pressure, the amplitudes of both types of cycles increase. With the increase in the coefficient of kinetic friction, the amplitude of stable limit cycle increases.

关 键 词：干摩擦力 制动 颤振 多极限环 

分 类 号：U461.3[机械工程—车辆工程]