Effects of the vibration characteristics of linear motors on the polygon wheel problem
FU Bin1,LUO Shi-hui1,XU Zi-Qiang2,TANG Yang1,3,MA Wei-hua1
1. Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu 610031;
2. Locomotive & Car Research Institute, China Academy of Railway Sciences, Beijing 10081
3. Mechanical Engineering Department, Emei Campus of Southwest Jiaotong University, Emei 614202
Abstract:Aiming at analysing the bad ride comfort caused by the nine-order polygon wheel of a domestic subway vehicle, numerical simulations and field tests were carried out. The reason of polygon wheel was analyzed theoretically. A dynamic model for the subway vehicle was established and the natural frequencies of bogie components were calculated. The simulations show that the vehicle ride comfort is irregularly bad at 40km/h. The transfer function from the track irregularity to the motor displacement was established and the results show that nine-order polygon wheels produce external excitation of 43Hz at 40km/h which is close to the vertical vibration natural frequency of the linear motor, causing the resonance of motor and the development of polygon wheel. The field tests show that the ride comfort tested on the car body is also irregularly bad at 40km/h and it tends to deterioration with the growth of polygon wave depth. The methods for simulations and field tests for studying polygon wheel effect, featured with the irregular vibration velocity as a key factor, were summarized. Finally, the parameters of motor suspension were optimized to eliminate the severe vibration and to improve the ride comfort.
付彬1,罗世辉1,许自强2,唐阳1,3,马卫华1. 直线电机振动特性对车轮多边形问题的影响研究[J]. 振动与冲击, 2018, 37(1): 150-155.
FU Bin1,LUO Shi-hui1,XU Zi-Qiang2,TANG Yang1,3,MA Wei-hua1. Effects of the vibration characteristics of linear motors on the polygon wheel problem. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(1): 150-155.
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