Transient state analysis of a rub-impact rotor system during maneuvering flight  

作　　者：Jun WANG Yunfei LIU Zhaoye QIN Liang MA Fulei CHU 

机构地区：[1]Beijing Key Laboratory of Health Monitoring and Self-Recovery for High-End Machinery Equipment,Beijing University of Chemical Technology,Beijing 100029,China [2]State Key Laboratory of Tribology,Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China [3]College of Aeronautical Engineering,Civil Aviation University of China,Tianjin 300300,China

出　　处：《Chinese Journal of Aeronautics》2024年第7期236-251,共16页中国航空学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.12202229);the Science Center for Gas Turbine Project,China(No.P2022-B-III-002-001);the Scientific Research Projects of Tianjin Education Commission,China(Nos.2020KJ018,2020KJ060).

摘　　要：Maneuvering flight substantially affects the dynamic behavior of rotors;particularly,such flight may cause rubbing between a rotor and stator,which is one of the most serious damages in aircraft engines.In this paper,a nonlinear dynamic model for describing the dynamic characteristics of a rub-impact rotor system during maneuvering flight is established based on the Lagrange equations.Subsequently,numerical simulations employing the Newmark method are performed,delving into the detailed discussion of the influence of parameters such as rotational speed and maneuvering flight on the transient and steady-state responses of the rotor system.The effect mechanism of maneuver load and its coupling with rub impact is revealed.The results show that the impact response induced by maneuvering flight is more obvious in the subcritical state than in the supercritical state.The additional stiffness and damping are also induced;in particular,the additional damping has a coupling effect.Moreover,the rub impact imposes an additional constraint on the rotor system,thereby weakening the influence of the maneuver load and becoming the major factor that determines the dynamic behavior of the rotor system at high speeds.

关 键 词：Maneuvering flight Rub impact Rotor system Dynamic response Impact response 

分 类 号：V231.9[航空宇航科学与技术—航空宇航推进理论与工程]