碰摩转子-油膜轴承系统的非线性响应分析  

NONLINEAR RESPONSE ANALYSIS OF DOUBLE DISK RUBBING ROTOR-OIL FILM BEARING SYSTEM

作　　者：刘俊杰 张凌云 尹凤伟[2] 覃泽锋 LIU JunJie;ZHANG LingYun;YI FengWei;QIN ZeFeng(School of Mechanical and Electrical Engineering,Ianzhou Jiaotong University,Lanzhou 730070,China;Department of Railuay Locomotive,Jilin Railweay Technology College,Jilin 132200,China)

机构地区：[1]兰州交通大学机电工程学院,兰州730070 [2]吉林铁道职业技术学院铁道机车学院,吉林132200

出　　处：《机械强度》2020年第6期1310-1315,共6页Journal of Mechanical Strength

摘　　要：为了更精确地描述转子-轴承系统,考虑非线性油膜力、碰摩力的影响,建立了一个非线性支撑的单盘碰摩转子-油膜轴承系统模型,并推导出系统的无量纲运动方程。采用四阶Runge-Kutta法对方程进行了数值计算,综合运用分岔图、轴心轨迹图、Poincaré截面图及最大碰摩力图研究系统的动力学行为,分析偏心量以及转速比的变化对该系统的非线性动力学特性的影响。分析结果表明:随着偏心量的减小和转速比的增加,转定子间的碰摩力也会随之减小,系统的混沌区域也会减少,系统处于周期运动,从而能够提高系统的稳定性。In order to describe rotor-bearing system more accurately and to consider the influence of nonlinear oil film force and rubbing force,this paper establishes a single disk rubbing rotor-bearing system model with nonlinear support,and deduces the dimensionless motion equation of the system.The four-order runge-kutta method was used to numerically calculate the equation.The bifurcation diagram,axis trajectory diagram,Poincare cross section diagram and maximum rubbing force diagram were comprehensively used to study the dynamic behavior of the system,and the influence of eccentricity and rotation speed on the nonlinear dynamic characteristics of the system was analyzed.The analysis results show that with the decrease of eccentricity and the increase of rotating speed ratio,the rubbing force between rotating stator will also decrease,the chaotic region of the system will also decrease,and the system is in periodic motion,thus the stability of the system can be improved.

关 键 词：碰摩 转子轴承系统 油膜力 分岔 

分 类 号：TH133[机械工程—机械制造及自动化]