汽车盘式制动器摩擦-振动耦合特性试验研究

本文针对9种具有不同厚薄差和端面跳动量组合的汽车盘式制动器,利用制动器惯性试验台在四种制动压力工况下进行了制动转矩和制动压力的测量,并通过阶次分析与小波分析的方法研究了盘式制动器摩擦特性与制动压力波动之间的耦合关系.研究发现:制动盘的厚薄差和端面跳动会引起法向力的波动,进而引起摩擦系数的波动,并且摩擦系数、制动压力以及制动转矩的波动都与转速存在2阶的阶次关系;摩擦系数静态成分随着相对速度的减小和制动压力的减小而增大;摩擦系数动态部分随制动压力的增大而减小,且主要由制动盘厚薄差引起,端面跳动对其影响不明显.

Experimental Investigation into Friction- Vibration Coupling Characteristics of Vehicle Disc Brake

The friction and vibration coupling effect of disc brake was investigated using order analysis and wavelet transformation of brake torque variation and brake pressure variation,which were measured from 9 kinds of disc brakes with various disc thickness variation(DTV) and surface runout(SRO) combination under four brake pressure levels on a brake dynamometer test rig.The brake disc DTV and SRO caused pulsation of normal force and resulted in oscillation of friction coefficient,and that friction coefficient o...