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为了有效布设轨道交通网络,考虑可达性约束与轨道线网合理规模约束,建立了城市轨道交通网络布局优化的双层模型。该模型上层为一个多目标函数,其使得总出行时间最少,轨道交通线网总长度最少及总换乘次数最少;下层通过容量限制分配方法将客流在轨道交通线网上进行分配。算例结果表明,运用该双层模型可对所有可能的轨道交通线路进行筛选,并得到最优的线路网络布设方案。该模型可用于城市轨道交通规划中,对线路网络进行优化布局。
In order to layout the rail transit network effectively, a dual-layer model of urban rail transit network layout optimization is established considering the constraints of reachability and the reasonable scale constraints of the rail network. The upper layer of the model is a multi-objective function that minimizes the total travel time, minimizes the total length of the rail transit network and minimizes the total number of interchanges. The lower layer distributes the passenger traffic on the rail transit network through the capacity-limited allocation method. The results of the example show that all the possible rail transit lines can be screened and the optimal route network layout can be obtained by using the two-layer model. The model can be used in urban rail transit planning to optimize the layout of the line network.