支承松动故障转子系统共振区动态特性分析  

Dynamics of Pedestal Looseness Rotor System Near the Critical Speed Region

作　　者：姚红良[1] 刘长利[1] 张晓伟[1] 闻邦椿[1] 

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2003年第8期798-801,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50275024)

摘　　要：根据工程实际,建立了松动故障转子系统的非线性动力学模型,利用KBM法对模型进行分析,得到故障转子在共振区的动力学行为特征如共振区提前且持续区间较长,二倍频、三倍频等高次谐波明显以及故障转子系统具有'软式'非线性特性等;分析了支承刚度、转轴刚度等系统参数对松动故障转子系统非线性特性的影响·与已有文献的实验结果比较,结论与实验结果比较吻合·结果可为该类故障转子系统的监测和故障诊断提供参考·A new type of dynamic model for pedestal looseness rotor system was built, and the dynamics of the rotor system in resonance region was analyzed by using KBM method. Some dynamic characteristics of pedestal looseness rotor system were found. The natural frequency of the fault system descends and the resonance region becomes greater,the highorder harmonic is evident, the system has 'soft' nonlinear characteristic. The affections on the faulting system of some system parameters, such as pedestal stiffness and shaft bending stiffness,were studied. The theoretrcal analysis comforms to the experimental results.

关 键 词：支承松动 KBM法 高次谐波 共振 故障诊断 跳跃现象 

分 类 号：TH13[机械工程—机械制造及自动化]