Wang Xun, Peng Tiefeng, Wu Pingbo, Cui Litong
State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, Sichuan, China.
Shenzhen Possibler Technology Co., Ltd, Shenzhen, China.
Sci Rep. 2021 Sep 15;11(1):18409. doi: 10.1038/s41598-021-97650-4.
With the continuous development of rail transit industry and the acceleration of train speed, higher requirements are established for the operation quality of high-speed trains and the reliability of transmission system. In the process of train running, speed fluctuation and vibrations from various parts of the driving devices are common, which could be greatly affected by the traction torque. During traction transmission, the harmonic vibration torque exists in traction motor due to that the motor is connected with non-sinusoidal alternating current. In order to study the vibration influence of the electrical component of traction transmission system on the rail vehicles, i.e., bogie and car-body, an electro-mechanical coupling dynamic model for rail transit vehicles was established by explicitly incorporating the electric-induced traction into the transmission model. The dynamics responses of the vertical, lateral and longitudinal acceleration on vehicle components, such as axle box and car-body were quantitative analyzed. By comparison with field test, it was observed that there was a vibration peak of 12-times of the fundamental rotor frequency on the bogie frame and axle box, which existed at conditions of traction, uniform speed and braking. However, the vibration acceleration exhibit nearly little difference with or without traction force, especially at low frequency domain < 100 Hz.
随着轨道交通行业的不断发展以及列车速度的加快，对高速列车的运行质量和传动系统的可靠性提出了更高的要求。在列车运行过程中，驱动装置各部件的速度波动和振动较为常见，这会受到牵引扭矩的显著影响。在牵引传动过程中，由于牵引电机连接的是非正弦交流电，电机中存在谐波振动扭矩。为了研究牵引传动系统电气部件对轨道车辆（即转向架和车体）的振动影响，通过将电致牵引力明确纳入传动模型，建立了轨道交通车辆的机电耦合动力学模型。对车轴箱和车体等车辆部件的垂直、横向和纵向加速度的动力学响应进行了定量分析。通过与现场试验对比发现，在转向架构架和车轴箱上存在一个为转子基频12倍的振动峰值，该峰值在牵引、匀速和制动工况下均存在。然而，无论有无牵引力，振动加速度几乎没有差异，尤其是在低频域<100Hz时。
