基于有限时空域的铁路运行图货物列车运行线铺画方法研究

Method for Drawing Freight Train Running Lines in Railway Train Working Diagram Based on Finite Space-Time Domain

目前我国部分普速铁路干线仍然存在客货列车争能现象,为此铁路部门时常采用“调客增货”的方式以满足部分时段货物运输需求。但由于普速铁路列车运行图编制时,货物列车运行线的铺画优先级往往低于旅客列车,缺少旅客列车停开后的货物列车运行线自动分析和编制方法,导致货运市场与运行图编制无法适配。为此,将普速铁路旅客列车停开后的货物列车运行线铺画问题转化为动态规划问题,从运行线的函数特征、车站间隔时间和货物列车运行线铺画区域3个方面阐述模型原理,构建基于双计算周期的动态规划模型,并以京广铁路平南至邯郸南一场区段为例对模型进行了有效性验证。结果表明,该方法能有效求解有限时空域内的货物列车运行线连续铺画问题,对提高普速铁路通过能力利用率、优化普速铁路客货列车结构具有理论与实际意义。

There is still a competition phenomenon between passenger trains and freight trains on some trunk lines of conventional railways in China.Therefore,the railway department often adopts the method of adjusting passengers and increasing goods to meet the demand for freight transportation during some periods.However,as freight train running lines are often drawn after passenger train running lines when the conventional railway train working diagram is prepared,and there is a lack of automatic analysis and preparation methods after the passenger trains stop running,the incompatibility between the freight market and working diagram preparation ensues.Therefore,the problem of drawing freight train running lines after the passenger trains stop running on conventional railways was transformed into a dynamic programming problem.The model principle was expounded from three aspects:functional characteristics of running lines,station interval time,and area for drawing freight train running lines.A dynamic programming model based on dual calculation cycles was constructed,and the model’s effectiveness was verified by taking the section from Pingnan Station to Handannan Station on the Beijing-Guangzhou Railway as an example.The results show that the model can effectively solve the continuous drawing problem of freight train running lines in a limited space-time domain,which has theoretical and practical significance for improving the passing capacity of freight trains on conventional railways and optimizing the structure of passenger and freight trains on conventional railways.