基于级联失效的道路网络脆弱性研究

发布时间：2018-06-03 15:04

本文选题：道路网络 + 复杂网络　；参考：《华中科技大学》2015年硕士论文

【摘要】：近年来,交通事故,自然灾害以及人为因素等造成城市交通大面积堵塞甚至瘫痪,特别是网络中少数某些关键单元失效会引发其他单元失效,最终导致道路网络崩溃从而造成重大的经济损失,这逐渐引起众多学者对城市道路网络脆弱性的研究。随着复杂网络的研究不断深化渗入各个学科,小世界网络特性和无标度特性作为复杂网络两大重要特性,极大的促进了复杂网络的推广及应用,也为道路网络复杂性的探讨提供了崭新的视角。目前,关于城市道路网络脆弱性研究重点分布于影响源的识别、评估指标选取和评估模型的构建等,而本文在介绍道路网络脆弱性及其影响因素的基础上基于级联失效研究了不同影响源对城市道路网络脆弱性的影响,寻求最具鲁棒性的道路网络,具体内容如下:1、城市交通网络作为一个复杂巨系统,由居民出行网络和道路网络组成,论文根据交通网络特性并结合负载-容量模型构建了城市双层交通网络级联失效模型来仿真不同影响源对道路网络脆弱性的影响。2、分析道路网络动态脆弱性及其指标,通过数值仿真将是否考虑级联失效这一因素对城市道路网络脆弱性指标对比分析,结果表明考虑级联失效下路网脆弱性能体现道路网络的动态关联性。3、基于Python开发平台及其内置的Networkx复杂网络包采用数值分析方法从状态和结构两方面出发,根据构建的城市双层城市道路网络级联失效模型主要探讨居民出行网络拓扑结构、交通需求总量、道路网络容量、道路网络拓扑结构以及攻击方式五种因素对城市道路网络脆弱性的影响并提出相应控制措施。
[Abstract]:In recent years, traffic accidents, natural disasters and human factors have caused a large area of traffic congestion or even paralysis, especially the failure of a few key elements in the network will lead to the failure of other units. Finally, it leads to the collapse of the road network, resulting in significant economic losses, which has gradually caused many scholars to study the vulnerability of urban road network. With the development of complex network, the characteristics of small-world network and scale-free network, as two important characteristics of complex network, have greatly promoted the popularization and application of complex network. It also provides a new angle of view for the discussion of the complexity of road network. At present, the research on the vulnerability of urban road network is focused on the identification of the sources of influence, the selection of evaluation indicators and the construction of evaluation models, etc. On the basis of introducing the vulnerability of road network and its influencing factors, this paper studies the influence of different influence sources on the vulnerability of urban road network based on cascade failure, and seeks the most robust road network. The specific contents are as follows: 1. As a complex and huge system, the urban transportation network is composed of the resident travel network and the road network. According to the characteristics of traffic network and combined with load-capacity model, this paper constructs a cascade failure model of urban double-layer traffic network to simulate the impact of different impact sources on the vulnerability of road network, and analyzes the dynamic vulnerability of road network and its indicators. Through numerical simulation, the vulnerability index of urban road network will be compared and analyzed whether the cascading failure is considered or not. The results show that the vulnerability of road network under cascaded failure can reflect the dynamic correlation of road network. Based on the Python development platform and its built-in Networkx complex network packet, the numerical analysis method is used to analyze the state and structure of the network. According to the cascade failure model of urban double-layer urban road network, the topology of resident travel network, the total traffic demand and the capacity of road network are discussed. The influence of five factors of road network topology and attack mode on the vulnerability of urban road network is discussed and the corresponding control measures are put forward.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U491

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