基于路段流量分析的路网脆弱性研究  

Road Traffic Network Vulnerability Study Based on Link Flow Analysis

作　　者：刘海旭[1,2] 荣新 

机构地区：[1]西南交通大学交通运输与物流学院,四川成都610031 [2]综合运输四川省重点实验室,四川成都610031

出　　处：《综合运输》2017年第11期63-67,共5页China Transportation Review

基　　金：国家自然科学基金项目(51278429);中国国家留学基金资助

摘　　要：道路交通网络脆弱性研究的关键是寻找路网中的脆弱性路段。传统的研究方法将路网中的所有路段作为脆弱性路段备选集合进行遍历搜索,计算量极大,求解效率较低。本文在路网流量分配基础上,通过对路段流量的分析,以路段v/c值为依据提出了构造脆弱性路段备选集合的新方法。该方法通过缩小备选集合规模,可以有效提高脆弱性路段的计算效率。在此基础上,本文从路网运行状态出发,以路网平均出行时间增加率作为评价指标,构建了路网脆弱性评估模型。最后,通过算例分析对所构建的脆弱性评估模型进行演算,结果表明本文所提出的脆弱性路段备选集合的构造方法是合理且有效的。The key to the study of vulnerability of road traffic network is to find the vulnerability links in the network. The traditional analysis method traverses all the links as an alternative set of the vulnerability links,it is a large amount of calculation and the solution efficiency is also lowly. This paper proposes a new method for constructing the alternative set of vulnerability links through the analysis of link flow and the v/c value of link on the basis of the traffic assignment. This method can reduce the scale of alternative sets and improve the efficiency of calculation. On the basis of this,this paper constructs the vulnerability assessment model with the evaluation index of the increase of average travel time of the road network. Finally,the vulnerability assessment model is calculated by the example analysis,the result shows that the method of constructing the alternative sets of vulnerability road section is reasonable and effective.

关 键 词：交通工程 道路交通网络 脆弱性研究 路段流量分析 

分 类 号：U491[交通运输工程—交通运输规划与管理]