城市轨道交通网络可靠性研究

Reliability Study of Urban Rail Transit Network

运用复杂网络理论及熵权法对城市轨道交通网络进行可靠性的综合评价,找出脆弱的站点以加强防护。将城市轨道交通网络抽象为由车站和轨道交通线路所构成的非加权无向网络,再对网络节点的度和度分布,以及网络直径、平均路径长度、聚类系数等特性进行分析,得出网络类型。提出了评价网络可靠性的3个指标,并用熵权法确定各指标权重。以重庆城市轨道交通网络为实例对该方法进行了应用。

Complex network theory and entropy method are used to evaluate comprehensivelythe reliability of urban rail transit network, so as to find the fragile stationsfor protec- tion. Firstly, the network is abstracted as a net constituted by stations and lines with no weights and directions; then, some characteristic indicators like node degree and degree distribution, network diameter, average length of route, clustering coefficient are studied, the type of the network is derived. Finally, three indexes assessing network reliability are put forward, entropy method is used to determine the weight of the above indexes. A case study of Chongqing rail transit networkverifies this method.