摘要
为研究城市公共交通复合网络的拓扑结构特性,在构建多方式、多层次拓扑网络的基础上,对以成都市为例的地铁-公交复合网络在袭击与拥堵下的有效性进行了分析.运用复杂网络理论,首先测度地铁-公交复合网络在不同袭击模式下的静态抗毁性,以评判复合网络中节点与连边的重要度;其后对突发性事故下地铁客流拥堵的传播扩散现象与级联失效过程进行仿真分析,通过对受阻客流在复合网络中传播性的分析,评判复合网络中地铁线路与沿线公交线路应急协调能力的匹配度.研究结果表明:在随机、蓄意两种袭击下,地铁-公交复合网络的最大连通度与网络效率的降幅与降速均低于地铁子网络与地面公交子网络,复合网络整体效能优于单一网络;基于有无容量限制下成都市8条地铁线路的拥堵失效仿真结果,能够评估其沿线既有公交线路的应急疏运能力,从而制定具有针对性的策略措施,以应对突发性事故下复合网络的过载情况.
To study the topological characteristics of urban public transit compound network,the validity of urban subway-bus compound network in Chengdu under attack&congestion was analyzed by constructing multimode topology network.Through the complex network theory,firstly,the static invulnerability of urban subway-bus compound network under different attack modes was tested to judge the importance degree of relevant nodes and lines.Then,the propagation of network overload and/or congestion,the cascading failure process under subway emergency were measured,so as to estimate the emergency coordinative performance of the ground public transportation system adjacent to metro lines.The results indicate that compound network has better overall efficiency than single network according to the lower decreasing amplitude and speed droop of the indices of network efficiency under random and intentional attack.In the opinion of the simulation results of cascading failure features of eightmetro lines in Chengdu under the emergency episode with&without restrictive capacity,the emergency response capability of the bus lines system along the metro lines can be measured and judged effectively,in order to implementing pointed and efficient strategies&measures to handle the flow overload of the compound network arising from sudden accidents.
出处
《西南交通大学学报》
EI
CSCD
北大核心
2018年第1期156-163,196,共9页
Journal of Southwest Jiaotong University
基金
国家自然科学基金资助项目(51108390
70422201)
关键词
城市交通
复杂网络
地铁-公交复合网络
抗毁性
级联失效
urban traffic
complex network
subway-bus compound network
survivability
cascading failure
