高速转向架小幅蛇行运动状态下过道岔研究

Research on aisle in high-speed bogie with small hunting motion

摘要:

针对高速列车系统在小幅蛇行失稳状态下通过道岔的问题，建立高速转向架横向运动模型，采用国内18号高速道岔结构参数建立道岔不平顺激励模型，计算了转向架在小幅蛇行失稳状态下以不同速度通过道岔的轮对横移量，并与平稳状态下进行对比分析。分析结果表明：小幅蛇行失稳状态下通过道岔与进岔时的蛇行振幅有关。振幅较小时，与平稳状态下过道岔基本一致，安全过岔速度为道岔允许速度。振幅较大时，会在道岔允许通过速度以内出现小幅蛇行发散至标准蛇行失稳的情况，安全过岔速度低于道岔允许时速。建议在过道岔前对小幅蛇行运动的进行在线监测，通过小幅蛇行状态合理设置过道岔速度。

Abstract:

Aiming at the problem that the high-speed train system passes the turnout in the small hunting instability state. The lateral motion model of the high-speed bogie is established, and the turnout irregularity excitation model is established by using the domestic 18-channel high-speed turnout structure parameters, and the bogie is calculated under the small hunting instability state. The amount of traverse of the wheel turns at different speeds is compared and compared with the steady state. The analysis results show that the small hunting is related to the amplitude of the hunting movement when the turnout is in the state of instability. When the amplitude is small, it is basically the same as the aisle in the steady state, and the safe over-speed is the allowable speed of the turnout. When the amplitude is large, a small hunting divergence to the standard hunting instability will occur within the allowable passage speed of the turnout. The safe overshoot speed is lower than the allowable speed of the turnout. It is recommended to monitor the small hunting movement online before the aisle, and set the aisle speed reasonably through a small hunting state. Key words：high-speed bogie；small hunting；irregularity of turnout；hunting instability