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城市轨道交通网络脆弱性分析是城市轨道交通网络规划的重要组成部分。在各种突发事件的影响下,城市轨道交通网络的通行效率将大大降低,网络中的乘客将遭受额外的出行时间损失。基于网络中乘客的出行时间总损失,本文定义了城市轨道交通网络脆弱性概念,即城市轨道交通网络组成单元在受到突发事件影响后,整个网络在网络组成单元间相互作用以及突发事件持续影响下所引起的出行时间总损失,并在此基础上构建了城市轨道交通网络脆弱性评估模型,以网络平均出行时间损失为测度,度量网络中各区段组成单元的脆弱性并对网络整体的脆弱性进行评估。最后,通过一个算例分析对所构建的模型进行演算,结果表明该模型在评估城市轨道交通网络脆弱性方面是有效的。
Urban rail transit network vulnerability analysis is an important part of urban rail transit network planning. Under the influence of various emergencies, the traffic efficiency of the urban rail transit network will be greatly reduced, and passengers in the network will suffer extra travel time losses. Based on the total travel time loss of passengers in the network, this paper defines the concept of vulnerability of urban rail transit network, that is, the components of urban rail transit network are affected by emergencies, the whole network interacts with each other and the contingencies continue The total loss of travel time caused by the impact of the urban rail transit network under the impact of the construction of the urban rail transit network vulnerability assessment model to measure the average loss of travel time as a measure of network vulnerability of the various components of the network and the network as a whole Vulnerability assessment. Finally, an example analysis is used to calculate the constructed model. The results show that the model is effective in assessing the vulnerability of urban rail transit network.