磁悬浮裂纹转子-轴承碰摩系统的动力学特性  

Dynamic Characteristics of Magnetic Cracked Rotor Bearing System with Impact-Rub Force

作　　者：徐璐[1] 褚衍东[2,3] 饶晓波 XU Lu;CHU Yan-dong;RAO Xiao-bo(School of Mechatronic Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;School of Mathematics and Physics,Lanzhou Jiaotong University,Lanzhou 730070,China;Key Laboratory of System Dynamics and Reliability of Rail Transport Equipment of Gansu Province,Lanzhou 730070,China)

机构地区：[1]兰州交通大学机电工程学院,甘肃兰州730070 [2]兰州交通大学数理与软件工程学院,甘肃兰州730070 [3]甘肃省轨道交通装备系统动力学与可靠性重点实验室,甘肃兰州730070

出　　处：《兰州交通大学学报》2018年第2期84-91,共8页Journal of Lanzhou Jiaotong University

基　　金：国家自然科学基金(11161027;11262009);兰州市人才创新创业项目(2015-RC-3)

摘　　要：为了研究磁悬浮裂纹转子-轴承碰摩系统的动力学特性,采用数值积分法,利用分岔图、时间响应图、Poincaré截面图和相图,首先探究裂纹深度A和裂纹角对β系统产生的影响,其次探明刚度比K、偏心量比U和库伦滑动摩擦系数μ对裂纹磁悬浮转子动力学的影响.结果表明:当磁悬浮转子出现裂纹时,随着裂纹的加深,转子的刚度会被裂纹的扩展所弱化,引发转子剧烈震动导致失稳,此外裂纹深度较大时,偏心量比U和库伦滑动摩擦系数μ对系统运动状态产生微弱的影响.In order to study the dynamic characteristics of magnetic cracked rotor bearing system with impact rub force,the numeric integration method,bifurcation diagrams,time response figures,Poincarédiagrams and phase diagramsthe were used firstly to explore the impact of cracked depth A and crack angleβon the system,and secondly to analyse the respective effects of stiffness ratio K,unbalanced parameter U and Coulomb sliding friction coefficientμon dynamics of cracked magnetic rotor.The results show that with the crack deepening,the stiffness of the rotor is weakened by crack extension,which leads to violent vibration of the rotor and consequently results in instability.In addition,unbalanced parameter U and Coulomb sliding friction coefficientμhave no significant effects on the motion state of the system when the crack becomes deeper.

关 键 词：磁悬浮转子 辅助轴承 碰摩 裂纹 振动 非同步运动 同步运动 

分 类 号：O322[理学—一般力学与力学基础] TH122[理学—力学]