摘要
以单跨双盘柔性转子系统为研究对象,基于接触动力学理论,应用有限元法,建立了考虑整周多点碰摩的转定子系统动力学模型.将转子和定子简化为一个点点接触单元,分析了两种不同载荷工况(两圆盘偏心同相位和反相位)导致的共振情况下,侵入量(未碰摩转子振幅与转定子间隙之差)和定子刚度对系统振动响应的影响.研究结果表明,两圆盘偏心反相位时的碰摩比同相位时更为剧烈,定子刚度对转定子碰撞导致的反弹程度以及定子振动加速度影响较大.
The dynamic model for a flexible rotor system,which considered multipoint annular rubbing,was established using the finite element method based on the contact dynamics.The rotor-stator multipoint annular rubbing was simulated using a point-point contact element.The effects of penetrating amounts,i.e.,the difference between the vibration amplitude of the rotator without rubbing and the rotor-stator gap,and the stator stiffness on the vibration responses of the system were analyzed under two types of exciting loads.The eccentricity directions of the two discs were the same（case 1） or opposite（case 2）.The results show that the rubbing is serious under case 2 than that under case 1,and the stator stiffness has great influence on the rebounding intensity caused by the rotor-stator rubbing and on the acceleration responses of the stator.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第8期1149-1153,共5页
Journal of Northeastern University(Natural Science)
基金
中央高校基本科研业务费专项资金资助项目(N100403008)
教育部新世纪人才支持计划项目(NCET-11-0078)
关键词
整周多点碰摩
转子系统
接触动力学
振动响应
有限元
multipoint annular rubbing
rotor system
contact dynamics
vibration response
finite element
