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《Bearing》 2013-08
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Analysis on Nonlinear Dynamic Characteristics of Rolling Bearings for Multiple Unit Trains

Cao Qing-song,Zhu Zhi-qiang,Ye Zheng-chun,Xiong Guo-liang(School of Mechanical & Electrical Engineering,East China Jiao Tong University,Nanchang 330013,China)  
The nonlinear dynamic model of CRH1 rolling bearings and axle coupling system is established based on rotor dynamics and nonlinear dynamics theory.The dynamic response and nonlinear characteristics of the coupling system under different operating conditions are investigated through numerical method,and the nonlinear response charts are obtained for the coupling system including time domain chart,axis trajectory,phase diagram and Poincare maps in the process of acceleration and deceleration.The simulation results show that rolling bearings and axle coupling system is chaotic when multiple unit trains are in the process of acceleration and deceleration,and the vibration is serious.The axis trajectory presents a random movement,the vibration characteristics of system present differences at different speeds.
【Fund】: 国家自然科学基金资助项目(51265010)
【CateGory Index】: U266.2
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