转子-轴承系统裂纹-碰摩耦合故障的非线性特性研究  

STUDY ON NONLINEAR CHARACTERISTICS OF ROTOR-BEARING SYSTEM WITH COUPLING FAULTS OF CRACK AND RUB-IMPACT

作　　者：罗跃纲[1] 张松鹤[1] 闻邦椿[2] 

机构地区：[1]大连民族学院机电与控制工程研究所,大连116600 [2]东北大学机械工程与自动化学院,沈阳110004

出　　处：《振动与冲击》2005年第3期43-46,i004-i005,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(50275024)

摘　　要：研究了带有裂纹和碰摩耦合故障的弹性转子系统的复杂运动。在同时考虑轴承油膜力和碰摩发生时转静件间的相对速度对非线性摩擦力的影响基础上,构造了含有裂纹-碰摩耦合故障转子系统的动力学模型。针对短轴承油膜力和裂纹-碰摩转子系统的强非线性特点,本文用Runge-Kutta法对转子-轴承系统由裂纹和碰摩耦合故障导致的非线性动力学行为进行了数值仿真研究,发现该类系统在运行过程中存在周期运动、拟周期运动和混沌运动等丰富的非线性现象,研究结果为转子-轴承系统故障诊断、动态设计和安全运行提供了理论参考。An elastic rotor-bearing system with coupling faults of crack and rub-impact was studied on the basis of nonlinear dynamics and rotor dynamics. A dynamic model of the rotor-bearing system is established considering both the oil film force and the nonlinear friction force. In view of the strong nonlinear characteristics of the oil film force in short bearing and the complexity of coupling faults, nonlinear dynamic behaviors induced by coupling faults of crack and rub-impact, is numerically studied with Runge-Kutta method. Abundant nonlinear phenomena such as periodic motion, quasi-periodic motion and chaos are found out, the results may provide theoretical references for fault diagnosis, dynamic design, and security running to rotor-bearing system.

关 键 词：转子-轴承系统 耦合故障 裂纹 特性研究 弹性转子系统 碰摩转子系统 系统故障诊断 动力学模型 动力学行为 非线性现象 拟周期运动 复杂运动 相对速度 强非线性 仿真研究 运行过程 混沌运动 研究结果 安全运行 动态设计 

分 类 号：O322[理学—一般力学与力学基础] TH113.1[理学—力学]