转子系统支承件松动下动力学建模及动态响应  

Dynamic modeling and response analysis of the loose supports in rotor systems

作　　者：庾辉 张文浩 瞿维 张根保[2] 廖昌荣[3] YU Hui;ZHANG Wenhao;QU Wei;ZHANG Genbao;LIAO Changrong(College of Mechanical Engineering,University of South China,Hengyang Hunan 421001,China;State Key Laboratory of Mechanical Transmissions for Advanced Equipment,Chongqing University,Chongqing 400044,China;College of Aerospace Engineering,Chongqing University,Chongqing 400044,China;Research and Development Center,Zhejiang Fengli Pulverization Equipment Limited Corporation,Shengzhou Zhejiang 312400,China)

机构地区：[1]南华大学机械工程学院,湖南衡阳421001 [2]重庆大学高端装备机械传动全国重点实验室,重庆400044 [3]重庆大学航空航天学院,重庆400044 [4]浙江丰利粉碎设备有限公司研发中心,浙江嵊州312400

出　　处：《航空动力学报》2025年第1期293-305,共13页Journal of Aerospace Power

基　　金：高校博士科研启动基金(210XQD019);国家自然科学基金重点项目(51835001)。

摘　　要：针对转子系统轴承支承件的松动问题,基于松动支承件的几何特征建立了轴承碰撞过程的数学表征,通过Lankarani-Nikaravesh模型对松动端轴承力进行计算。利用牛顿定律建立了转子系统轴承支承件松动的动力学模型,采用Runge-Kutta法对系统动力学方程进行求解,分析了松动程度、工作转速和系统阻尼对转子系统输出特性的影响。研究结果表明:支承件松动的转子系统在其频谱图上会出现fs、3fs和5fs等奇数倍频信号;支承件松动会在增大轴承力幅值和增大载荷交变次数这两个方面显著降低轴承的使用寿命;转子系统会随着松动程度的加剧、运行转速升高以及系统阻尼减小而越不稳定。研究结果为轴承支承件松动故障影响分析工作提供了参考,也可以作为轴承座松动故障诊断的依据。In view of the looseness of bearing supports in rotor systems,the mathematical representation of bearing impact process was established based on the geometric characteristics of loose supports.The bearing force of the loose end was calculated by Lankarani-Nikaravesh model.By using Newton's law,the dynamic model of the rotor system with bearing support looseness was established.The Runge-Kutta method was adopted to solve the dynamic equations.The influences of the factors,such as looseness degree,and working speed and damping,on the dynamic performance of the rotor system with bearing support looseness were studied.The results showed that:when the support of the rotor system was loose,the odd frequencies,such as fs,3fs and 5fs etc.,could show up on its spectrum.Besides,the service life of the bearing could be significantly reduced by the increase of the bearing force and the frequency of load alternation caused by the looseness of the support.With the looseness being heavier,the accuracy of the rotor system in the looseness direction decreased gradually.The rotor system might become more unstable as the degree of looseness increased,the operating speed increased,and the system damping decreased.The research results can provide a reference for the fault analysis of the bearing support looseness.It also can be applied into the looseness diagnosis of bearing pedestal.

关 键 词：松动 碰摩 滚动轴承 转子系统 轴承 精度 轴承座 

分 类 号：V214.1[航空宇航科学与技术—航空宇航推进理论与工程]