汽车制动尖叫不稳定性的复特征值分析和瞬态动力学分析  

Complex Eigenvalue Analysis and Dynamic Transient Analysis of Automotive Brake Squeal Instability

作　　者：黄晓婷 李长玉 吕辉 HUANG Xiaoting;LI Changyu;LV Hui(School of Automobile and Traffic Engineering,Guangzhou College of South China University of Technology,Guangzhou 510800,China;School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510641,China)

机构地区：[1]广州城市理工学院汽车与交通工程学院,广东广州510800 [2]华南理工大学机械与汽车工程学院,广东广州510641

出　　处：《汽车实用技术》2023年第23期106-112,共7页Automobile Applied Technology

基　　金：国家自然科学基金面上项目(52375093)。

摘　　要：为探讨复特征值分析(CEA)和瞬态动力学分析(TDA)在制动尖叫研究中的应用,将两种方法分别应用于同一汽车盘式制动器的尖叫不稳定性分析中,对其分析效率、分析特点和分析结果开展了对比研究。结果表明,两种方法均能对某制动器系统7.5kHz附近的潜在制动尖叫进行有效预测,但CEA预测的尖叫频率数目多于TDA;CEA的计算效率远高于TDA;CEA可求解系统的不稳定特征值及不稳定模态,而TDA则可求解系统的振动加速度(速度或位移)、接触力和接触面积等;摩擦因数对系统的稳定性有显著影响,摩擦因数越大,尖叫不稳定性越突出。In order to investigate the application of complex eigenvalue analysis(CEA)and dynamic transient analysis(DTA)on brake squeal prediction,both CEA and DTA are applied to predict the squeal instability of a disc brake system.The investigation is focused on the comparison of computational efficiencies,analysis characteristics and analysis results.The investigation results show that both methods are available to predict the potential brake squeal at about 7.5 kHz of the investigated disc brake,but the number of unstable frequencies predicted by CEA is larger than that predicted by DTA.Nevertheless,the CEA is far more efficient than DTA on squeal instability analysis.Furthermore,all the system eigenvalues and the unstable modes can be obtained by performing CEA on one run,while the system vibration accelerations(velocities or displacements),contact forces and contact areas can be calculated by carrying out DTA.The investigation results also show that friction coefficient has great influence on system stability,and the squeal instability increases with the increase of friction coefficient.

关 键 词：复特征值分析 瞬态动力学分析 制动尖叫 不稳定性 

分 类 号：U463.51[机械工程—车辆工程]