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| Effects of bearing stiffness on the stability of planetary gear trains |
| XUN Chao,LONG Xinhua,HUA Hongxing |
| Institute of Vibration, Shock, and Noise, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China |
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Abstract The effects of bearing stiffness on planetary gear parameter instability were analytically investigated.A nonlinear model with multiple degrees of freedoms was built taking consideration of both translations and rotations of each component, variable mesh stiffness, backlash, loss of contact and eccentricity errors in the analysis.New classification of modal types was proposed depending on the motions of both center gears and planet gears.The effects of bearing stiffness on the natural frequencies, the instability boundaries and the response amplitudes of each modal type were analytically investigated through the method of multiple scales.And the results agree well with those of numerical integrations.The results show that the different specific influences mainly depend on the motions of planet gears.This study is expected useful for selections of bearings in the designing process of planetary gear trains.
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Received: 24 August 2016
Published: 15 April 2019
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