城市轨道交通线网结构评价研究

A Study on the Evaluation of Urban Rail Transit Network Structure

随着各大中型城市的轨道交通建设速度加快,城市轨道交通线网正在从"线路型"向"网络化"转变,为系统科学地评价城市轨道交通线网规划水平,在图论的基础上运用复杂网络理论,提出复杂性因子、平均换乘次数、线网效率等11个线网评价指标,建立城市轨道交通线网评价体系。以北京市城市轨道交通线网为例,对其线网结构进行评价。研究结果表明,北京市城市轨道交通线网结构处于良好状态,而且为真实反映城市轨道交通线网的服务水平,在构建评价指标体系时不仅需要将方法进行融合,同时需要考虑各站的实际客流量,进一步验证了城市轨道交通线网评价指标体系的实用性。

As the rail transit projects accelerate in the large and medium-sized cities,urban rail is growing from a single line to a network.To evaluate the planning of urban rail network in a systematical and scientific way,this paper builds up an urban rail network evaluation system,using complex network theory based on graph theory,and proposes 11 evaluating factors such as complexity factor,average transfer times,and network efficiency.The system is verified through taking the urban rail network in Beijing as an example for evaluation.The evaluation shows that the network of Beijing is in good condition;on the other hand,this justifies the evaluation system itself.Moreover,to better investigate the service quality of urban rail,not only different methods shall be integrated,but also the real passenger flow of each station shall be considered.