超限货物列车对单线区段通过能力的影响分析

Influence analysis of transport capacity loss for out-of-gauge freight trains running on single-track railway

以单线自动闭塞区段的列车追踪运行过程为研究对象,结合列车在单线区段的运行特征,采用元胞自动机理论,引入列车当量、停靠和越行元胞等概念;提出多种变换规则,分析超限列车越行前、后的元胞状态,构建基于CA的单线列车运行仿真模型及单线铁路运能损失评估通用模型;设计了相应的启发式算法求解模型,通过计算机模拟单线区段列车运行过程,评估铁路运能损失。仿真结果表明:所提出的模型与算法能有效评估超限货物列车运行所引起的运能损失,合理分析列车混跑、速度传递效应对单线铁路运能所造成的不利影响。

Through taking the process of multi-train movement on single automatic block section as the research object, according to the running characteristic that freight trains should obey while operating in single-track section and the theory of CA ,this paper proposed the concepts of train equivalent, stop cellular and overtaking cellular. On the basis of the running process of train in the district, proposed many kinds of transformation rules. Analyzed the cellular state of the out-of-gauge train before and after overtaking. Constructed train running simulation model of single-track section based on CA, and built evaluation general model of single-rail transportation capacity loss for the running of out-of-gauge train. Designed the corresponding heuristic algo- rithm for solving model, simulated running process of trains on single-track section through computer, depicted the loss characteristics of capacity caused by running of out-of-gauge trains, which evaluated the capacity loss of railway transportation. Simulation results show that models and algorithms put forward can evaluate capacity loss caused by running of out-of-gauge freight train effectively, and also analyze the adverse influence of single-rail transport capacity caused by mixed running of trains with various speeds and their transfer effect legitimately.