摘要
摩擦衬片包角对制动尖叫具有重要影响。针对某通风盘式制动器,建立有限元复模态模型并通过尖叫台架试验进行了正确性验证。基于该模型针对5种包角水平的摩擦衬片,通过仿真计算分析其对制动尖叫倾向性的影响,并从制动块自由模态特性、盘块间接触压力分布、不稳定模态频率及模态耦合特性角度解释了不同摩擦衬片包角对制动尖叫的影响机制。分析表明:摩擦衬片包角的改变会同时引起制动块结构特性变化和接触压力分布的变化,进而引起不稳定模态数量、频率和模态耦合特性的改变。
Lining arc of brake pad has a very important effect on disc brake squeal. A finite element complex analysis model of a ventilated disc brake was established and validated through a bench test of brake squeal. Based on this model,the influence of pad lining arc on brake squeal trend was investigated using simulation of disc brakes with pads of five lining arcs. At the same time, the influence mechanism was studied from view points of natural vibration characteristics of brake pad,pressure distribution between pad and disc,instable modal frequencies and modal coupling.It was shown that the structural characteristics and pressure distribution variations due to pad lining arc variations can cause the change of instable modes,modal frequencies and modal coupling.
出处
《振动与冲击》
EI
CSCD
北大核心
2016年第5期59-64,共6页
Journal of Vibration and Shock
基金
国家自然科学基金(51175380)
中央高校基本科研业务费专项资金
