以接车间隔替代到达间隔对车站通过能力影响的分析研究

Influence on Passing Capacity by Replacing Arrival Headway with Train Receiving Headway

分析传统车站到达间隔的计算方法,提出将其作为衡量通过能力的关键指标存在定位不准的问题,而接车间隔对应进站信号机连续开放的最小时间间隔,更加准确地反映了车站到达通过能力,是车站到达作业效率的直接体现。提出一种全新的车站到达间隔计算模型及方法,采用过程分析的方法,通过引入限制点和释放点的概念描述列车到达间隔限制关系,推导出连续接车间隔与到达间隔的差异,从而合理测算车站到达间隔。并且以京沈客运专线朝阳北站及黑山北站为例开展案例研究,仿真结果证实到达间隔与接车间隔之间的差异非常明显,说明采用到达间隔衡量车站到达通过能力将产生较大的偏差,以接车间隔替代到达间隔作为衡量车站到达作业相关的通过能力指标更具有现实意义。

Traditional station train arrival headway is regarded as a key performance index of headway capacity while it is not the right representation of the headway after analysis.Meanwhile,as the minimum time interval of successive clearing of home signals,train receiving headway more accurately reflects the passing capacity of station arrival and directly mirrors the work efficiency of station arrival.Through process analysis,a new type of model and method for calculating arrival headway was provided by introducing the concept of restriction point and release point to depict the restriction among arriving trains.The difference between successive train receiving headway and arrival headway was then deduced and a reasonable calculation was conducted for station arrival headway.A case study was carried out by taking the Chaoyangbei Station and Heishanbei Station of the Beijing-Shenyang Passenger Line.The simulation results show that there is a significant difference between train arrival headway and receiving headway,which indicates that adopting train arrival headway to measure the station arrival passing capacity will produce large errors.Therefore,replacing arrival headway with train receiving headway as the measurement of station arrival passing capacity is of more practical significance.