模态耦合与能量馈入两种摩擦尖叫机理关系  

Relationship Between Two Friction-induced Squeal Mechanisms of Mode Coupling and Energy Feed-in Theories

作　　者：张立军[1] 吴军[1] 孟德建[1] 

机构地区：[1]同济大学汽车学院,上海201804

出　　处：《同济大学学报（自然科学版）》2015年第10期1562-1569,共8页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金(51175380)

摘　　要：模态耦合和能量馈入是当前重要的两个摩擦尖叫发生机理理论,但是对于两种理论之间的关系尚未有针对性的开展研究.针对一种典型的集总参数柔体刚体组成的摩擦振动副,建立2自由度摩擦振动动力学模型;推导了系统产生不稳定模态耦合的条件,并分满足模态耦合条件、满足临界模态耦合条件和不满足模态耦合条件3种情况分析了模态耦合理论与能量馈入理论之间的关系.结果表明:能量馈入依赖于模态耦合理论,而不是一种摩擦噪声机理理论.Mode coupling theory and energy feed-in theory are both regarded as important generation mechanisms of frictioninduced squeal,but there have been no investigations into relationship between them so far.A two-degree-of-freedom vibration model was established to describe the dynamics of a kind of typical frictional system with friction pairs of a lumped parameter mass and a rigid mass.The conditions of mode coupling instability were derived,as well as the relationship between mode coupling and energy feed-in,when conditions of mode coupling were met,not met,or met just critical.The analysis results show that energy feed-in is dependent on mode coupling theory and cannot be regarded as generation mechanism of friction squeal.

关 键 词：摩擦尖叫 发生机理 模态耦合 能量馈入 

分 类 号：U463[机械工程—车辆工程]