表面波纹度对滚动轴承-转子系统非线性振动的影响  

Effect of surface waviness on nonlinear vibration of a rotor with ball bearings

作　　者：顾晓辉[1] 杨绍普[1] 刘永强[1] 廖英英[1] 

机构地区：[1]石家庄铁道大学机械工程学院,石家庄050043

出　　处：《振动与冲击》2014年第8期109-114,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(11172182;11227201;11202141);铁道部重点项目(2011J013-A);河北省教育厅项目(Z2011228)

摘　　要：分析了考虑滚动轴承内外圈波纹度、径向间隙和非线性赫兹力作用下的滚动轴承-转子系统非线性动力学响应。根据不同参数下的分岔图、功率谱图和庞加莱截面图,研究了轴承表面波纹度最大幅值和转速对系统的非线性振动的影响,找到了不同故障类型的特征频率。根据分形理论应用G-P算法计算了相同转速下不同最大幅值时的关联维数。分析结果表明,当系统处于混沌状态时随着波纹度最大幅值的增加,其关联维数也会相应增大。因此关联维数可以应用于轴承故障的特征提取与定量诊断中。The nonlinear dynamic response of a rotor with ball bearings considering nonlinearities of surface waviness,internal radial clearance and Hertzian contact force was analyzed and the results were presented in the forms of bifurcation diagram,power spectrum and Poincar＆#233; map.The effects of maximum amplitude of waviness and rotating speed on the nonlinear vibration of the rotor system were studied and characteristic frequencies of different faults were found.G-P method was used to calculate the correlation dimension number for different maximum amplitudes under the same rotating speed.The results showed that the correlation dimension number increases with increase in the maximum amplitude of the waviness when the system is in a chaos;the correlation dimension number can be applied in extraction and quantitative diagnosis of faults.

关 键 词：滚动轴承 非线性动力学 波纹度 关联维数 混沌 

分 类 号：TH133.33[机械工程—机械制造及自动化] O322[理学—一般力学与力学基础]