Abstract

In order to study the effect of interface modifications combination of multiple friction blocks on truck brake squeal, a field test was carried out in this study. In the test, the vibration acceleration and the noise signals of the truck braking system were collected. The test results showed that the high-frequency squeal noise during braking resulted from the frictional vibration of the braking system. A simplified finite element model of the heavy truck braking system was established to investigate the effect of slotting and chamfering of friction block on brake squeal. The results of complex eigenvalue analysis indicate that the interface modifications have a great influence on truck brake squeal. A proper combination of slotting and chamfering of friction blocks is useful for the reduction of brake squeal tendency. This study can provide guidance for the design and optimization of silent braking system.

摘要

为了研究多个摩擦块的界面改性组合对卡车制动尖叫的影响，本研究进行了现场试验。在测试中，采集了卡车制动系统的振动加速度和噪声信号。测试结果表明，制动过程中的高频尖叫声是由制动系统的摩擦振动引起的。建立了重型卡车制动系统的简化有限元模型，研究了摩擦块开槽和倒角对制动尖叫的影响。复特征值分析结果表明，界面修改对卡车制动尖叫有很大的影响。摩擦块的开槽和倒角的适当组合对于减少制动尖叫趋势是有用的。