摘要
考虑到目前关于盘式制动器尖叫噪声的仿真研究通常忽略了转向节的影响,建立包含转向节部件的盘式制动器有限元模型,利用复特征值分析法对该制动器的振动尖叫特性进行预测分析,重点探讨了转向节的特性对制动尖叫行为的影响。结果表明增大摩擦因数会增强制动系统产生尖叫的倾向和强度,转向节对制动系统不同部件之间的耦合具有重要影响,其模态将会诱导制动尖叫噪声的产生。当模型忽略转向节时,尖叫预测结果可能出现"过预测"和"欠预测"的现象。转向节刚度增大会诱导更多频率的不稳定振动产生,同时增大系统的振动尖叫强度。由于转向节和盘毂之间并没有存在明显的摩擦运动,因此转向节-盘毂连接处的摩擦因数并不会对系统的制动尖叫行为产生重要的影响。以上研究结果为认识制动尖叫的产生机理及提出合理改善尖叫措施提供依据。
Considering that the effect of steering knuckle on squeal is usually ignored when performing analysis of disc brake squeal,in this work,a finite element model of disc brake system including steering knuckle component is established,and the vibration characteristics of the brake system are predicted and analyzed by using complex eigenvalue analysis method.On this basis,the influence of steering knuckle characteristics on brake squeal instability behavior is studied.The results show that the increase of friction coefficient will enhance the tendency of braking system to generate squeal instability,and the steering knuckle plays a significant role in affecting the coupling between different components of the brake system.The mode of knuckle may induce the generation of brake squeal.Ignoring the steering knuckle during squeal analysis and prediction will cause the phenomenon of‘over-prediction’and ‘under-prediction’.The stiffness of steering knuckle has a strong influence on squeal behavior.The increase of steering knuckle stiffness will cause more unstable vibration of frequency and accordingly increase the squeal intensity of the system.In addition,since there is no significant friction movement between the knuckle and the disc hub,the friction coefficient at the knuckle-disc hub connection shows little impact on the braking squeal behavior of the system.The above research results provide a basis for understanding the generation of brake squeal and proposing reasonable measures to improve the squeal.
作者
金鑫君
方晓汾
邓小雷
JIN XingJun;FANG XiaoFen;DENG XiaoLei(Quzhou College of Technology,Quzhou 324000,China)
出处
《机械强度》
CAS
CSCD
北大核心
2021年第1期250-254,共5页
Journal of Mechanical Strength
基金
浙江省自然科学基金项目(LY16E050011)
衢州市级科技计划指导性项目(2019007)资助。
关键词
盘式制动器
转向节
振动
尖叫
仿真分析
Disc brake system
Knuckle steering
Vibration
Squeal
Simulation analysis
