摘要
为了研究摩擦尖叫的产生机理,利用汽车制动盘、摩擦材料及铝合金圆销设计了一种长度可调的盘/销摩擦试验装置,进行了不同销长的摩擦尖叫试验。基于盘/销零件的约束模态试验结果,建立了装置的有限元模型。利用复特征值分析方法研究了销长、摩擦因数、载荷、速度和材料特性等因素对摩擦尖叫噪声的影响。结果表明:当圆销和制动盘间弯曲模态频率相近时会形成模态耦合,系统不稳定,产生摩擦尖叫噪声;通过改进系统结构、适当降低摩擦因数和调整材料特性可以减轻或消除摩擦尖叫。
To investigate the generation mechanism of friction-induced squeal,apin-on-disc test rig is firstly designed by utilizing an automotive brake disc,a friction pad and a round pin of Al alloy.Then the friction-induced squeal experiments are performed by adjusting the pin length.The finite element model is built up based on the constrained modal experiments of pin and disc.Finally,the influences of pin length,coefficient of friction,load,disc speed and material property on friction-induced squeal are investigated by using the complex eigenvalue analysis method.The results show that when the bending mode frequencies of pin and disc are closed to each other,the modes will be coupled,and the system will be unstable to produce squeal.Friction-induced squeal can be reduced or even eliminated by optimizing the structure,reducing the friction coefficient and adjusting the material property.
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2014年第1期46-51,188-189,共6页
Journal of Vibration,Measurement & Diagnosis
基金
国家自然科学基金资助项目(51175380)
江苏省基础研究计划资助项目(BK2013122)
中央高校基本科研业务费专项基金资助项目
关键词
盘形制动
动力稳定性
噪声试验
摩擦振动
盘
销装置
模态耦合
复特征值分析
disc braking
dynamic stability
noise test
friction-induced vibration
pin-on-disk setup
modal coupling
complex eigenvalue analysis
