双跨弹性转子系统弯扭摆耦合非线性故障特征分析  

Characteristic Analysis on Nonlinear Faults of Two-Span Rotor System Due to the Combination Vibration of Bending,Torsion and Swinging

作　　者：袁惠群[1] 寇海江[1] 李东[1] 

机构地区：[1]东北大学理学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2010年第10期1470-1474,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(10772043)

摘　　要：建立了非对称弹性支承下,带有基础松动-碰摩耦合故障的双跨转子系统弯扭摆耦合非线性动力学模型.应用数值方法研究双跨转子弯扭摆耦合振动下的动力学特性,利用分岔图、幅频特性曲线图、相图及幅值谱图,分析了摆振对于双跨转子系统的影响,揭示了不同结构参数下该类转子系统的典型非线性特征,为该类转子系统故障诊断提供依据.结果表明:摆振对双跨转子系统的运动影响显著;With respect to an asymmetrically elastically supported two-span rotor system under the fault coupling loosened pedestal with tub-impact,a nonlinear dynamic model was developed to study numerically the dynamic characteristics of the system during a combination vibration of bending,torsion and swinging.Analyzing the effect of swinging on the system via the bifurcation diagram,phase diagram and amplitude-frequency spectrum,the typical nonlinear characteristics of such rotor systems with different structural parameters were revealed,thus providing a reference to the fault diagnosis of such rotor systems.The results showed that the effect of the vibration due to swinging on a running two-span rotor system is of significance,and that the nonlinear amplitude-frequency characteristic curve of a rotor system with looseness fault presents several unsmoothed peaks.

关 键 词：非线性双跨转子 弯扭摆耦合 陀螺效应 松动 碰摩 

分 类 号：TH113.2[机械工程—机械设计及理论]