编组站编组去向与调车线数量协调优化研究

协调编组站调车线数量与其服务的编组去向数量，对缓解编组站作业压力，压缩车流中转时间具有积极的意义.分析列车编组去向和调车线运用关系，建立以编组站为中心的运输网络，借鉴分层枢纽选址思想，构建编组去向与调车线数量协调优化模型，运用ILOG CPLEX软件求解.通过算例验证了模型的有效性，计算结果表明：根据车流情况，可在一定程度上将部分衔接方向合并，使编组去向数量和编组站调车线数量相协调；与此同时，根据支点站数量及运价的变化情况，可单独设置编组去向或扩建新线提高能力供给.优化结果可为编组站扩能和日常组号管理提供决策支持.

Optimization of Train Blockings and Shunting Lines in a Railway Marshalling Yard

Matching the number of blockings and shunting lines is helpful to alleviate the operation pressure of the marshalling station and decrease the transit time. The transport network centered on a marshalling yard is established by analyzing the relationship of blockings and shunting lines. The optimization model of matching blockings and shunting lines is constructed with hierarchical hub location method and solved by ILOG CPLEX. A numerical example is given to prove the validity of the model. The result shows that some cohesion directions could be merged to match blockings and shunting lines according to the traffic flow. In addition, the marshalling yard needs to build new lines to satisfy the demand when the number of fulcrum stations and the freight rate are changed. The optimization results can provide a reference for the marshaling yard to expand the capacity and daily blocking policy management.