中介轴承波纹度对双转子系统动力学特性的影响  

Effects of Surface Waviness of Intershaft Bearing on Dynamic Characteristics of Dual Rotor System

作　　者：李静[1,2,3] 曹树谦[1,2,3] 郭虎伦[1,2,3] Li Jing;Cao Shuqian;Guo Hulun(Department of Mechanics,Tianjin University,Tianjin 300354,China;Tianjin Key Laboratory of Nonlinear Dynamics and Control,Tianjin 300354,China;National Demonstration Center for Experimental Mechanics Education,Tianjin University,Tianjin 300354,China)

机构地区：[1]天津大学力学系,天津300354 [2]天津大学天津市非线性动力学与控制重点实验室,天津300354 [3]天津大学力学国家级实验教学示范中心,天津300354

出　　处：《机械科学与技术》2020年第11期1794-1804,共11页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(11672201,11872045);航空发动机及燃气轮机重大专项基础研究项目(2017-IV-0008-0045)资助。

摘　　要：针对航空发动机双转子系统,根据转子动力学理论和拉格朗日方程建立中介轴承-双转子系统模型,采用数值仿真方法获得系统动力学特性,借助时变刚度曲线、幅频响应曲线、三维瀑布图、分岔图以及庞加莱截面图等,对比分析了理想中介轴承-双转子系统和考虑波纹度的中介轴承-双转子系统的时变刚度特性、中介轴承力、主共振、频谱特征以及分岔与混沌特性。结果表明,中介轴承波纹度使双转子系统运动状态更加复杂,尤其在较低转速下,波纹度会对双转子系统的动力学特性产生显著影响。This work established a dynamic model of intershaft bearing-dual rotors in aero-engine with the theory of rotor dynamics and Lagrange equation.The vibration characteristics were examined by numerical simulation.With the time-varying stiffness curve,amplitude-frequency curve,three-dimensional waterfall plot,bifurcation diagram,Poincare map and so on,the time-varying stiffness characteristic,intershaft bearing force,primary resonance,spectrum characteristic,bifurcation and chaos characteristics of the ideal intershaft bearing-dual rotor system and the system with surface waviness on the intershaft bearing are analyzed comparatively.The results show that the surface waviness of the intershaft bearing complicated the vibration condition of the dual rotor system.The surface waviness has significant influence on the dual rotor system,especially at the lower speed.

关 键 词：理想中介轴承 中介轴承波纹度 双转子系统 动力学特性 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程]