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 引用本文: 李小彭,陈仁桢,尚东阳,陈延炜.变刚度轴承-碰摩转子机动飞行动力学响应[J].哈尔滨工业大学学报,2020,52(1):1.DOI:10.11918/201901003 LI Xiaopeng,CHEN Renzhen,SHANG Dongyang,CHEN Yanwei.Dynamic response of maneuvering flight friction rotor with variable stiffness bearing[J].Journal of Harbin Institute of Technology,2020,52(1):1.DOI:10.11918/201901003
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 本文已被：浏览 797次   下载 397次 码上扫一扫！ 分享到： 微信 更多 字体:加大+|默认|缩小- 变刚度轴承-碰摩转子机动飞行动力学响应 李小彭,陈仁桢,尚东阳,陈延炜 (东北大学 机械工程与自动化学院, 沈阳 110819)

DOI：10.11918/201901003

Dynamic response of maneuvering flight friction rotor with variable stiffness bearing
LI Xiaopeng,CHEN Renzhen,SHANG Dongyang,CHEN Yanwei
(School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China)
Abstract:
To study the nonlinear dynamic characteristics of high-speed rolling bearing-rotor coupling system in maneuvering flight, the mathematical model of bearing-rub-impact rotor system with time-varying rigidity of rolling bearings in climbing-diving maneuvering flight was established by using finite element method, and the dynamic equation of the system was solved by Newmark-β integral method. The interaction between the time-varying stiffness of rolling bearings and the non-linear dynamic characteristics of rotor is considered in this model, as well as the influence of the eccentricity of rotor and the radial clearance of rolling bearings. By solving the model, the time-domain diagram, frequency-domain diagram and bifurcation diagram of the system under different states are obtained. Based on these, the time-varying characteristics of the stiffness of high-speed rolling bearings, the interaction between the stiffness of bearings and the dynamic state of rotor, the non-linear characteristics of the bearing-rotor system, the influence of the maneuvering flight state on the system and the dynamic response of rotor system with rub-impact fault in maneuvering flight are analyzed. The results show that the time-varying characteristics of bearing stiffness, which is one of the factors restricting the maximum speed of the rotor system, is closely related to the dynamic characteristics of the rotor system. Because of the maneuvering load, the complex non-linear dynamic characteristics will be generated in the rotor system, but when the speed of the system is low, the stability of the system will be improved to some extent due to the introduction of maneuvering loads. The stable motion interval decreases with the increase of rub-impact stiffness.
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