摘要
建立航空发动机双转子轴承系统的有限元模型,为考察碰摩特征对双转子系统的影响,在考虑转轴剪切效应、惯量分布效应、横向扭转以及系统结构的几何参数等重要影响因素的前提下考察碰摩故障对系统的影响.研究了碰摩间隙等参数变化时对双转子系统动态特性的影响规律.结果表明由于双转子本身结构和转速的影响,转子各处呈现非周期1运动.另外,由于碰摩影响,整个系统会出现非线性响应,但由于中介轴承的影响在无碰摩故障的转轴上非周期运动稍弱一些.中介轴承除了有耦合作用外,还起到了隔振的作用.
A finite element model of dual-rotor system and the rotor/stator contact model were established to investigate the effects of rub-impact. To make the results more accurate, the influences of shear, inertia distribution, lateral torsional and geometric parameters of the system were considered in the model. The dynamic response of dual-rotor system to the varied contact gaps was studied. Results indicate that period-3 is present in most parts of the rotor due to the inherent property of the dual-rotor system. Aperiodic motion is present in the whole system because of the effect of rubbing contact. Specifically, the aperiodic motion presented in the rotor without rubbing contact （ inner rotor） is not obvious due to the inter-shaft beating. It is shown that the inter-shaft bearing can not only couple the inner/outer rotor but isolate the vibration.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第5期726-730,共5页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金青年基金资助项目(51105063)
中央高校基本科研业务费专项资金资助项目(N120403004)
关键词
双转子系统
碰摩故障
接触
中介轴承
混沌
dual-rotor system
rub fault
contact
inter-shaft bearing
chaos
