基于复杂网络特征的城市轨道交通网络节点遭受攻击模拟分析

Simulation of Node Attacks on Urban Rail Transit Network Based on Complex Network Characteristics

城市轨道交通进入网络化运营时期后,车站一旦遭受攻击,会影响整个网络的运营。介绍了能够反映网络复杂度的网络特征参数;以上海轨道交通为例,构建了上海轨道交通站点连通网络图及相应的网络特征参数;建立了网络节点攻击模型;分析了不同攻击策略下网络全局效率和最大连通度的变化情况,以及单节点遭受攻击和多节点遭受攻击下的网络全局效率损失和最大连通度损失的变化情况。车站的节点度越大,其受攻击后对网络的影响就越大,因此需要对节点度大的节点进行重点保护,实施更加全面的管控措施。

After entering the network operation period,an attack on urban rail transit station will affect the operation of the whole network.In this paper,the network characteristic parameters that can reflect network complexity are introduced.Taking Shanghai rail transit as an example,a rail transit station inlerconnection network diagram and the corresponding network characteristic parameters of Shanghai rail transit are constructed,and the network node attack model is established.Then,changes in the global efficiency and the maximum connectivity of the network under different attack strategies,changes in the global efficiency loss and the maximum connectivity loss of the network under single node attack or multiple nodes attack are analyzed.It shows that the greater the node degree of the station,the greater the impact on the network after being attacked.Therefore,it is necessary to protect the nodes with large node degree and implement more comprehensive control measures.