基于Wilson-θ法的碰摩拉杆转子非线性动力学特性分析  

Nonlinear Dynamic Characteristics Analysis of Rod-Fastening Rotor with Rub-Impact Faults Based on Wilson-θMethod

作　　者：郑美茹[1] 黑棣[1,2] ZHENG Meiru;HEI Di(Department of Mechanical and Electrical Engineering, Shaanxi Railway Institute, Weinan 714000, China;Sada Traffic Energy Saving Technology Co., Ltd., Sanmenxia 472000, China)

机构地区：[1]陕西铁路工程职业技术学院机电系,陕西渭南714000 [2]三门峡速达交通节能科技股份有限公司,河南三门峡472000

出　　处：《轴承》2020年第9期22-28,32,共8页Bearing

基　　金：陕西省渭南市科研计划项目(2018-ZDYF-JCYJ-60);陕铁院中青年科技创新人才计划(KJRC201909)。

摘　　要：建立了具有2个轮盘的拉杆转子模型,将轮盘间的接触效应等效为具有非线性刚度的抗弯弹簧。基于Wilson-θ法分析了碰摩拉杆转子的动力学行为,将拉杆转子的运动行为与相应的整体转子进行比较,研究结果显示拉杆转子具有较好的稳定性;分别以转轴转速、轮盘偏心量、转轴刚度和碰摩刚度为控制参数,分析了系统的动力学行为,结果显示转子系统具有非常复杂的运动行为;比较了考虑碰摩和不考虑碰摩时系统的动力学行为,结果证明碰摩对转子运动会产生较大影响,碰摩刚度是影响系统运动行为的重要因素之一。The model is established for rod-fastening rotor with two disks,and the contact effect of two disks is taken as a bending resistance spring with nonlinear stiffness.The dynamics behaviors of rod-fastening rotor with rub-impact faults are analyzed based on Wilson-θmethod.Firstly,the dynamics behaviors between corresponding integral rotor and rod-fastening rotor are compared,and the research results show that the rod-fastening rotor is more stable.Then,taking the shaft speed,disk eccentricity,shaft stiffness and rubbing stiffness as control parameters,and the results show that the dynamics behaviors of rotor system are very complex.At the same time,the dynamics behaviors of the system with and without considering rubbing are compared,and the results show that the rubbing has a great influence on rotor motion,the rubbing stiffness is an important factor affecting dynamics behaviors of the system.

关 键 词：滑动轴承 拉杆转子 碰摩 刚度 WILSON-Θ法 稳定性 

分 类 号：TH133.3[机械工程—机械制造及自动化] TP391.9[自动化与计算机技术—计算机应用技术]