Research On The Adaptability Of High Speed Railway Physical Network And Train Service Network

The High Speed Railway of our country will meet its peak time during the”13th Five-Year” plan period.To fully achieve the advantage of the transport capacity and improve its service quality,research on the adaptability of High Speed Railway physical network and train service network is needed.the network topology of the physical network and the train service network were constructed in this paper firstly And based on SQL database,a reasonable data structure for the physical network and the train service network was designed.Finally,the program of high speed railway network was developed in the Microsoft SQL development environment.Then a preliminary exploration of the adaptability of High-speed railway physical network and train service network was made:try to analyze the adaptability from two aspects.Specifically,the adaptability analysis of network structure refers to the comprehensive index of node degree and betweenness of physical network,which can reflect the important degree of nodes in the network,then compare it with the train flow of node in service network.Physical network infrastructure environment and the application intensity of service network to it can be reflected according to the comparative relationship between the number of high-speed rail stations and the train density of stations in a certain region.The adaptability of network's service quality can be analyzed from three aspects: network speed,the shortest path of network and time accessibility of network.However,due to the limitation of data soources and programming complexity,part of the work of service quality analysis was not achieved in the case.Further more,Introduced the methods and steps of solving the related indicators and objects of node degree?betweness?train flow of high-speed rail station?number of high-speed rail staion in a region?train density of stations and the short path,for some of which can't be selected in the database,only can be solved by programming.Adaptability of high speed railway physical network and train service network of 2016 was analysed in the case.11.5% of high-speed train stations have kind of fully achieved the advantage of the transport capacity,and the station's physical network structure of the rest of which can meet the need for train density increasing in the future.It was found that there was a large gap among different regions according to the comparison of physical network number of high-speed station and its train density,and can be divided into four categories places.The analysis of network reachability shows that most nodes have a improving space for reachability in 0.15~0.60,and which was considered as reasonable and necessary,and was adapted to the physical network.8.68% of nodes have a improving space for reachability in 0.75~1.50,and which was considered that it was not suitable for physical network.But when the network passenger flow distribution changes In the future,the train path of service network will be adjusted to better adapt to the physical network.Altoghther,the physical network and train service network of high-speed network are basicly adapted to each other,while partly of it is not.