长沙地铁网络复杂特性与级联失效鲁棒性分析

Complex characteristics of Changsha metro network and robustness analysis of cascading failures

基于复杂网络理论,采用Space-L方法对长沙地铁网络的拓扑结构特性进行研究。通过4项鲁棒性评价指标,定量分析有无级联失效情况下的长沙地铁网络鲁棒性。研究结果表明:长沙地铁网络既不是无标度网络,也不是小世界网络,而是具备部分随机网络特性的混合拓扑网络;无论有无级联失效,蓄意攻击下网络皆比随机攻击更加脆弱;级联失效下考虑客流量重新分配的地铁网络在面对故障时更具脆弱性;与传统的节点重要程度排序相比,加入客流量会使排序发生较大的变化。

Based on the complex network theory,the topological structure of Changsha metro network was studied by using Space-L method.The robustness of Changsha metro network under the condition of cascading failure was quantitatively analyzed through 4 robustness evaluation indexes.It is concluded that the Changsha metro network is neither a small world network nor a scale-free network,but a hybrid topology network with certain random network characteristics.Whether there is a cascading failure,the network is deliberately more vulnerable than random attacks.The metro network considering redistribution of passenger flow under cascading failure is more vulnerable.Compared with traditional ranking of node importance,adding traffic will cause great changes in sorting.