Rubbing-Induced Vibration Response Analysis of Dual-Rotor-Casing System  

作　　者：Ma Xinxing Ma Hui Zeng Jin Piao Yuhua 

机构地区：[1]School of Mechanical Engineering and Automation,Northeastern University [2]State Key Laboratory of Mechanical System and Vibration,Shanghai Jiao Tong University

出　　处：《Transactions of Nanjing University of Aeronautics and Astronautics》2018年第1期101-108,共8页南京航空航天大学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.11772089);the Fundamental Research Funds for the Central Universities (Nos. N160312001and N160313004);the Research Project of State Key Laboratory of Mechanical System and Vibration(No.MSV201707)

摘　　要：Considering gyroscopic effects caused by rotational speed,torsional vibration as well as coupling effects among inner rotor,out rotor and casing,a dynamic model of the dual-rotor-casing system is established using finite element(FE)method.By comparing the natural characteristics obtained from MATLAB and ANSYS,the developed model is verified.Then rubbing-induced vibration responses in dual-rotor-casing system are analyzed.The effects of rotational speed and speed ratio on rubbing vibration responses of the system are discussed.Results show that different combined frequency components will appear in the spectrum except two unbalanced excitation frequencies and their multiple frequency components,and these frequencies can be used as the dual-rotor aero-engine rubbing failure diagnosis frequencies when rubbing occurs.Besides,the amplitude of torsional vibration is larger than that of lateral vibration under the same working condition,and speed ratio has a great impact on the periodicity of the system rubbing-induced motion trajectory.The amplitude of rubbing-induced responses under counter-rotation is less than that under co-rotation with the same parameters.Considering gyroscopic effects caused by rotational speed,torsional vibration as well as coupling effects among inner rotor,out rotor and casing,a dynamic model of the dual-rotor-casing system is established using finite element(FE)method.By comparing the natural characteristics obtained from MATLAB and ANSYS,the developed model is verified.Then rubbing-induced vibration responses in dual-rotor-casing system are analyzed.The effects of rotational speed and speed ratio on rubbing vibration responses of the system are discussed.Results show that different combined frequency components will appear in the spectrum except two unbalanced excitation frequencies and their multiple frequency components,and these frequencies can be used as the dual-rotor aero-engine rubbing failure diagnosis frequencies when rubbing occurs.Besides,the amplitude of torsional vibration is larger than that of lateral vibration under the same working condition,and speed ratio has a great impact on the periodicity of the system rubbing-induced motion trajectory.The amplitude of rubbing-induced responses under counter-rotation is less than that under co-rotation with the same parameters.

关 键 词：dual-rotor-casing SYSTEM RUBBING FAULT finite element method coupling dynamic 

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]