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《Chinese Journal of Theoretical and Applied Mechanics》 2010-03
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COUPLING DYNAMIC MODEL AND DYNAMIC ANALYSIS FOR WHOLE AERO-ENGINE

Chen Guo~(2)) (College of Civil Aviation College,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)  
In this paper,a rotor-ball baring-stator coupling dynamic model for whole aero-engine vibration is established.The main characteristics of the new model are as follows:1) the coupling effect between rotor,ball bearing and stator is considered fully;2) the flexible support and the squeeze film damper(SFD) are considered; 3) the rotor is considered as Equisection Euler Free Beam model,and its vibration is analyzed through cutting limited modes;4) nonlinear factors of ball bearing are modeled,such as the clearance of bearing,nonlinear Hertzian contract force,and the varying compliance;5) rubbing fault between rotor and stator is considered. In this paper,the numerical integral method is employed to obtain system's responses,and the whole aeroengine vibration characteristics are studied.Research topics are investigated,such as ball bearing VC vibration analysis,effect of elastic support stiffness on the system critical speeds,effect of cutting modes number on system responses,sudden-adding imbalance transient response simulation,and rotor-stator rubbing fault characteristics analysis.
【Fund】: 国家自然科学基金(50705042);; 航空科学基金(2007ZB52022)资助项目~~
【CateGory Index】: O322
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