我国西北地区铁路网络可靠性研究

我国西北地区铁路网络密度较低,如果线路或车站发生故障导致行车中断,对铁路运输影响较大。以我国西北地区普速铁路和高速铁路为研究对象,根据主要城市的铁路客运量、人口和GDP等综合因素,选取40个城市作为节点,基于SpaceL空间构建西北地区物理网络,计算我国西北地区铁路网络的度分布和中介中心性。采用单个节点攻击、蓄意ID攻击、蓄意RD攻击3种模拟方法计算节点失效后网络的全局效率,以分析西北铁路网络的可靠性。结果表明,西安、兰州、嘉峪关、中卫和咸阳对西北地区铁路网络的可靠性影响较大,应优先加强这些重要节点的连通性,以提升铁路网络的可靠性。

A Study on the Reliability of Railway Network in Northwest China

The density of the railway network in Northwest China is relatively low.If the line or station breaks down,the train operation will be interrupted,and railway transport will be significantly affected.Taking the conventional railway and high-speed railway in Northwest China as the research object,this paper selects 40 cities as nodes according to the comprehensive factors such as railway passenger transport volume,population,and GDP,constructs the physical network of Northwest China based on space L,and calculates the degree distribution and betweenness centrality of the railway network in Northwest China.In this paper,three kinds of simulation methods are used to calculate the global efficiency of the network after node failures,such as single-node attack,intentional ID attack and intentional RD attack,to analyze the reliability of the Northwest Railway Network in China.The results show that Xi’an,Lanzhou,Jiayuguan,Zhongwei,and Xianyang have a great influence on the reliability of the railway network in Northwest China.Priority should be given to strengthening the connectivity of these critical nodes to improve the reliability of the railway network.