Nonlinear Dynamic Characteristics of Geared Rotor Bearing System Featuring Confluence Transmission

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (8) : 105-113.

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Nonlinear Dynamic Characteristics of Geared Rotor Bearing System Featuring Confluence Transmission

GAO Hao-dong1,2 ZHANG Yi-du1,2 WU Qiong1,2 GAO Xiang-sheng1,2

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Abstract

With the consideration of backlash, transmission error, time-varying mesh stiffness nonlinear factors in gear system, nonlinear gear mesh force and nonlinear oil film force of journal bearing were considered synchronously, the dynamic model of confluence transmission geared rotor bearing system was proposed. From rotating speed, nonlinear dynamic response of gear system was researched, coupling between nonlinear gear mesh force and nonlinear oil film force was discussed,oil film’s stability with the change of rotating speed was judged.The result indicated that with the change of rotating speed the system showed periodic one motion, periodic two motion,quasi- periodic motion and chaos motion ,the road from quasi- periodic bifurcation to chaos was founded; with the increase of rotating speed, nonlinear gear mesh force and nonlinear oil film force played a leading role in the system vibration successively;oil film vibration lost stability through half frequency whirling motion.

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geared rotor bearing system quasi- periodic bifurcation nonlinear oil film force half frequency whirling motion

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GAO Hao-dong; ZHANG Yi-du; WU Qiong; GAO Xiang-sheng;. Nonlinear Dynamic Characteristics of Geared Rotor Bearing System Featuring Confluence Transmission[J]. Journal of Vibration and Shock, 2013, 32(8): 105-113