普速铁路列车追踪间隔时间计算方法研究

Research on Calculation Method of Conventional Railway Headway at Automatic Block Section

普速铁路列车均装备了速度连续控制模式的LKJ设备,分析列控系统对列车间隔时间计算方法的影响,提出自动闭塞区段普速铁路列车追踪间隔时间新的计算方法。设计具有代表性的线路、车站、信号和列车编组等参数,根据相关规范和行车规则分别计算生成160 km/h旅客列车和90 km/h货物列车LKJ常用制动曲线,据此拟合的旅客列车司机操纵曲线在减压量90、100 kPa的制动曲线之间,货物列车司机操纵曲线在减压量70、80 kPa的制动曲线之间,证明拟合的司机操纵曲线符合列车实际运行情况,可运用相应减压量仿真牵引计算过程检算列车追踪间隔时间。计算列车追踪间隔时间,根据计算结果可知列车追踪间隔时间主要受列车出发追踪间隔时间和列车到达追踪间隔时间限制,旅客列车可以实现5 min,货物列车在咽喉区400 m车站可实现7 min,在咽喉区800 m车站可实现7 min 30 s,表明采用LKJ速度连续控车模式对压缩列车追踪间隔时间、提高线路通过能力具有重要作用,按连续速度控制模式计算列车间隔时间的方法是科学合理的。

This paper proposed a new method for calculating train headway on conventional railway automatic block section,as conventional speed trains are equipped LKJ with the mode of one-time-continuous speed control,and the traditional method according to the interval distance of fixed blocking section is not applicable.In order to prove the reasonableness of this method,considering the common line,station,signal and train group parameters,the normal braking curves of LKJ for 160 km/h passenger trains and 90 km/h cargo trains were calculated and generated respectively according to the relevant specifications and operation regulations,according to which the fitted driver operation curve for passenger train was between the braking curve of decompression amount 90、100 kPa,and between 70、80 kPa for cargo train,which proves that the fitted driver operation curve matches the actual train operation,so that the train headway can be calculated by simulating the traction calculation process with the corresponding decompression volume.Conventional railway headway is mainly subject to the train departure tracking interval time and train arrival tracking interval time.The train departure tracking interval time and train arrival tracking interval time of passenger trains can realize 5 min while the train departure tracking interval time and train arrival tracking interval time of cargo trains in the station with the throat length of 400 m can realize 7 min.The train departure tracking interval time and train arrival tracking interval time of cargo trains in the station with the throat length of 800 m can realize 7 min 30 s,indicating that the use of LKJ with the mode of one-time-continuous speed control plays an important role in reducing the train headway,and improving the passing capacity.Therefore,the method of using the mode of one-time-continuous speed control to calculate the train headway is scientific and reasonable.