基于动态可靠性评价的区域铁路网规划优化:以成渝城市群为例

为保障区域铁路运输的安全性,提升铁路网系统灾时应急响应水平,运用复杂网络理论,以成渝城市群为例,构建无向无权铁路物理网和无向加权铁路车流网2种模型,选取最大连通子图的相对大小、网络鲁棒性、网络全局效率指标,从节点故障和边故障2个方面评价铁路网动态可靠性,并提出铁路网安全运营规划优化建议。研究表明:成渝城市群铁路网面对随机攻击具有鲁棒性,面对选择攻击具有脆弱性;网络故障条件下攻击的方式不同,网络的连通性能和信息传递效率分异显著;重庆北站、重庆站、成都东站、成都站、合川站、达州站,成都站-彭山站、新津站-新津南站、新津南站-彭山北站为影响网络可靠性的关键核心站点和路段。

Regional railway network planning optimization based on dynamic reliability evaluation: a case study on Chengdu-Chongqing urban agglomeration

In order to ensure the safety of regional railway transportation and improve emergency response effectiveness of railway network system in disasters,taking Chengdu-Chongqing urban agglomeration as an example,two models of undirected and unweighted railway physical network and undirected weighted railway traffic network were constructed by using complex network theory. Relative size of maximum connected subgraph,network robustness and overall network efficiency were selected to evaluate the dynamic reliability of railway network from two aspects of node failure and side failure. Based on this,a proposal for railway network safe operation planning optimization was put forward. The research shows that the railway network of Chengdu-Chongqing urban agglomeration is robust to random attack and vulnerable to selective attack,and the network connectivity and information transmission efficiency vary significantly under different attacks in the case of network failure. It is also found that Chongqing North Station, Chongqing Station,Chengdu East Station,Chengdu Station,Hechuan Station,Dazhou Station,Chengdu Station-Pengshan Station,Xinjin Station-Xinjin South Station and Xinjin South Station-Pengshan North Station are the key stations and road sections that affect the reliability of the network.