基于多品种流网络的高铁枢纽站站改期间多态理论通过能力影响分析

Influence of High Speed Railway Hub Station Reconstruction on Theoretical Carrying Capacity of Multiple States Based Multi-Variety Flow Network

按照高铁站站场基本布局,将其抽象为站场网络图。基于动车组列车咽喉通过时间基本相同特点,将咽喉区网络简化为单品种流网络,据此计算咽喉占用时间并推算咽喉能力。按照动车组列车进出到发线通过咽喉区先后顺序以及到发线停留时间的不同,将动车组列车归类为多品种流,利用到发线区域形成的多品种流网络特点计算到发线接发能力。基于咽喉与咽喉、咽喉与到发线之间的关联制约关系以及行车进路生成规则,针对动车组列车车流进出到发线通过咽喉区先后顺序的不同状态进行网络图流预推,分别推算出高铁枢纽站站改前以及站改期间的多态理论通过能力。最后基于通过能力对比,对站改期间通过能力的影响进行分析,结果表明咽喉的不同利用程度直接影响车站通过能力。

According to the basic layout, the high-speed railway hub station was abstracted as a network diagram. Since the time of electronic multiple units(EMUs) passing through the same throat is basically the same, the network in the throat area was simplified to a single-variety flow network. The throat time occupation and the throat capacity were calculated. According to the sequence of EMUs entering and leaving the arrival and departure track through the throat area and the residence time at the arrival and departure track, the EMUs were classified as multi-variety flow. In addition, the train receiving and departure capacity at the arrival and departure track was calculated based on the characteristics of the multi-variety flow network formed in the arrival and departure track area. Based on the correlation and restriction relationship between throats and between the throat and the arrival and departure track, as well as the rules for generating the driving route, the network diagram flow was pre-deduced according to the states of EMUs entering and leaving the arrival and departure track through the throat area in different sequences. Furthermore, the carrying capacities of the high speed railway hub station before and during station reform were calculated based on the polymorphism theory,respectively. Finally, the carrying capacities were compared, and the influence on the carrying capacity during station reform was analyzed. The result shows that different utilization degrees of throats directly affect the carrying capacity of stations.