摘要
以某航空发动机双转子系统为研究对象,建立考虑coriolis效应的双转子轴承系统的动力学模型,采用有限元法对双转子系统进行了模态分析和振型计算;分析不同转速比下转子系统的不平衡响应,发现不同转速比对转子的共振点影响极小,但是对振幅有一定的影响;研究转子的支承刚度对系统频率的影响,发现随着支承刚度的增加,转子的频率也会逐渐增大,但当刚度达到108以上时,频率变化甚小。研究结果为双转子系统的设计与计算提供理论参考。
Taking aero-engine rotor system as the research object, the dynamic model is established based on the coriolis effect. The modal analysis and vibration of dual rotor system is calculated using finite element method. The unbalance response of rotor system is analyzed based on the different speed ratio. It can be found that the different speed ratio of the rotor has a minimal impact on the resonance point, but has certain effect on amplitude. The influence of support stiffness on system frequency is analyzed. The research proves that the frequency of the rotor will gradually increases with the increase of support stiffness, but the influence of support stiffness on the critical rotation frequency varies very little when the stiffness is more than lOe8. The research results provide theoretical reference for the design and calculation of the dual rotor system.
出处
《机械工程师》
2015年第11期170-171,共2页
Mechanical Engineer
关键词
双转子
振动特性
有限元
aero- rotors
vibration characteristic
finite element
