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《Journal of Aerospace Power》 2007-10
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Nonlinear dynamic response analysis of unbalance-rubbing coupling faults of rotor-ball bearing-stator coupling system

CHEN Guo(College of Civil Aviation,Nanjing University of Aeronautics and Astronautics,Nanjing,210016)  
A new rotor-ball bearing-stator coupling dynamic model was established for the unbalance-rubbing coupling faults.In the model,the rotor mass unbalance and rubbing faults were fully considered.The nonlinear factors of ball bearing,such as the clearance of bearing,nonlinear Hertzian contract between balls and races,and the varying compliance(VC) of bearing support were modeled.Moreover,the numerical integral method was employed to obtain system's responses,whereas the bifurcation and chaos motion were analyzed,followed by the effects of rotational speed,rubbing stiffness,rotor eccentricity,bearing house-stator stiffness,and stator-foundation stiffness on dynamic responses.Therefore,the non-linear dynamic response laws of rotor-ball bearing-stator system under unbalance and rubbing coupling faults were obtained.
【Fund】: 国家自然科学基金资助(50705042)
【CateGory Index】: TH113
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