铁路枢纽内班列车流的组织优化研究

摘要

优化枢纽内班列车流的组织是提升班列组织效率的重要途径。基于班列作业时间，反推可能的运输服务，构建枢纽内班列车流组织服务网络。通过将不同联弧能力进行差异化设置，使其满足货运需求总量约束及班列组织对不同品类货物运量的要求。以运输服务组织总费用最小为目标，构建铁路枢纽内班列车流组织的混合整数规划模型。该模型在铁路运能逐步释放和提升的背景下，以满足枢纽内班列开行所要求的基本车流为约束，而弱化了班列车流组织过程中区段和站点作业能力约束。最后通过算例验证了模型的可行性和有效性。%Optimization of car flow organization for regular trains in railway hub is a rather important way to enhance the efficiency of regular trains. This paper proposes the method to get all the potential transport services at first, based on the schedule of regular trains in railway hub. Then we can obtain a service network of car flow organization. To fulfill the transport demand constraint, and the volume of different demand that the regular trains needed, all the capacity of the arcs in the network are initialized differently. After that, a mixed-integer programming model is presented, with the objective of minimal total cost of car flow organization for regular train in railway hub. At the background of the release and increase of rail freight transport capacity, this model has the cars flow constraint, which must be fulfilled for all the regular trains, while ignored the capacity constraint of arcs and nodes in the network. Then, an example is designed to validate the proposed model.