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ZHU Hai-yan, YIN Bi-chao, HU Hua-tao, XIAO Qian. Effects of harmonic torque on vibration characteristics of gear box housing and traction motor of high-speed train[J]. Journal of Traffic and Transportation Engineering, 2019, 19(6): 65-76. doi: 10.19818/j.cnki.1671-1637.2019.06.007
Citation: ZHU Hai-yan, YIN Bi-chao, HU Hua-tao, XIAO Qian. Effects of harmonic torque on vibration characteristics of gear box housing and traction motor of high-speed train[J]. Journal of Traffic and Transportation Engineering, 2019, 19(6): 65-76. doi: 10.19818/j.cnki.1671-1637.2019.06.007
shu

Effects of harmonic torque on vibration characteristics of gear box housing and traction motor of high-speed train

doi: 10.19818/j.cnki.1671-1637.2019.06.007

  • School of Mechatronics and Vehicle Engineering, East China Jiaotong University, Nanchang 330013, Jiangxi, China

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  • Author Bio:

    ZHU Hai-yan (1975-), male, associate professor, PhD, zhupetrelcao@163.com

  • Received Date: 2019-04-22
  • Publish Date: 2019-12-25
    Abstract
  • In order to research the vibration amplitudes and frequency spectrum distributions of gear box housing and traction motor under the coupling action of electromechanics and their changing trends with the speed of high-speed train, the harmonic frequency distribution of three-phase inverter output voltage and the harmonic torque of traction motor were analyzed, and the torsional vibration model of drive system was established. Based on the theories of direct torque control and vehicle system dynamics, the traction motor control model and multi-body dynamics model of high-speed train were constructed. By means of Simulink-SIMPACK joint simulation platform, the constant torque input model was compared with the torque input model with harmonic torque, and the effects of traction motor harmonic torque on the vibration characteristics of high-speed train gear box housing and traction motor were analyzed at different speeds. Analysis result shows that when the high-speed train runs at a uniform speed of 250 km·h-1, the longitudinal vibration above the large gear, the longitudinal and vertical vibrations above the small gear of gear box housing are seriously affected by the traction motor harmonic torque. The vibration acceleration amplitude increases significantly at the main frequency of 700 Hz that is exactly up to the 6 times of fundamental frequency of traction motor output torque. Under the influence of harmonic torque, the transverse vibration acceleration amplitude of traction motor at the main frequency of 52 Hz increases by 52.78%, and the vertical vibration acceleration amplitude at the main frequency of 49 Hz increases by 18.95%. As the speed of high-speed train increases, the longitudinal vibration of gear box housing and each direction vibration acceleration of traction motor increase gradually, and the influence of traction motor harmonic torque on the root mean square(RMS) of longitudinal vibration acceleration of gear box housing decreases gradually. The longitudinal and vertical vibration accelerations above the small gear of gear box housing and traction motor increase first and then decrease at the 6 times of fundamental frequency, and reach the maximum at the speed of 250 km·h-1. The influences of 6 times fundamental frequency of harmonic torque on the vertical vibrations of gear box housing and traction motor are more obvious than those on their longitudinal vibrations, and the harmonic torque has slight influence on their lateral vibration characteristics.

     

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