路网级联失效预防及修复策略研究

发布时间：2018-04-26 10:06

本文选题：交通工程 + 城市道路网络　；参考：《长沙理工大学》2015年硕士论文

【摘要】：城市道路交通网络是一种典型的复杂网络,级联失效是城市道路交通网络的一个重要特性。车辆保有量的快速增长、路网规模的不断扩大,城市道路交通网络级联失效的风险越来越大、破坏程度也越来越严重,级联失效的控制和应急处理也越来越重要。本文将围绕城市道路交通网络级联失效应怎样预防、级联失效发生后应怎么办两个问题展开研究。主要研究工作包括:1、预防城市道路交通网络级联失效策略为了防止路网发生大规模堵塞,预防或减弱级联失效影响,本文提出一种增加路段阻抗的级联失效预防策略,并构建了阻抗增加路段和阻抗增加值的优化模型,设计了计算流程。实验表明,对比不同饱和度大小的路段阻抗增加策略,饱和度最大的失效路段阻抗增加能最有效地预防和减弱城市道路交通网络级联失效作用,并且阻抗系数取值最小。2、城市道路交通网络级联失效后的修复策略级联失效发生后,应制定交通疏导策略,有效疏散交通,本文基于修复效果构建了一种修复方法。首先建立节点失效、节点修复效果的评价指标;然后依据失效节点修复效果后路网阻塞程度指标对节点重要度进行排序,并根据此排序顺序修复失效节点。实验表明,与节点的随机修复策略、基于节点度的节点修复策略相比,本文方法更能有效地疏散交通。本文针对城市道路交通网络级联失效预防及修复的研究,将有力地促进道路交通管理技术、交通复杂理论和方法的发展,研究成果具有重要的理论意义和广阔的应用前景。
[Abstract]:Urban road traffic network is a typical complex network. Cascade failure is an important characteristic of urban road traffic network. With the rapid growth of vehicle ownership and the continuous expansion of road network scale, the risk of cascade failure of urban road traffic network is increasing, and the degree of damage is becoming more and more serious, and the control of cascade failure and emergency treatment are becoming more and more important. This paper focuses on how to prevent cascade failure of urban road traffic network and what to do after cascade failure occurs. The main research work includes: 1, preventing cascade failure strategy of urban road traffic network. In order to prevent large-scale congestion of road network and prevent or weaken cascade failure effect, this paper proposes a cascade failure prevention strategy to increase road impedance. The optimization model of impedance increasing section and impedance added value is constructed, and the calculation flow is designed. The experimental results show that the maximum saturation section impedance increase can effectively prevent and weaken the cascade failure of urban road traffic network, compared with the increase strategy of road impedance with different saturation. And the impedance coefficient is the smallest. 2. After the cascade failure of urban road traffic network, the repair strategy should be formulated to effectively evacuate the traffic. In this paper, a repair method based on the repair effect is constructed. First, the evaluation index of node failure and node repair effect is established, and then the importance of node is sorted according to the road network blocking degree index after the failure node repair effect, and the failure node is repaired according to this sort order. The experimental results show that the proposed method is more effective than the random node repair strategy and the node repair strategy based on node degree. In this paper, the study of cascade failure prevention and repair of urban road traffic network will promote the development of road traffic management technology, traffic complex theory and methods. The research results have important theoretical significance and broad application prospects.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U491

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