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Railway capacity management and planning.

机译:铁路运力管理和规划。

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摘要

This research presents a novel model of the railway master scheduling problem, applies it to a theoretical study of railway line capacity under representative conditions, and offers a method for applying this model to practical railway scheduling problems. Contemporary market demands for different classes of rail transportation service are not adequately served because of the inability to assess the cost to the network of disparate services, as well as the inability to determine optimal scheduling. Disputes over cost and scheduling also arise between entities managing disparate services that must share common infrastructure.; This new model represents railway schedules as binary multicommodity flows on discrete time scales, mapped on a hypergraph. The objective function calculates network value as a linear combination of viable train paths, en route delay, and destination tardiness. Studies are presented that estimate the cost of imposing a non-conforming, high speed train on an existing congested, homogeneous railway network flow. The analysis is provided for two formats of single track railway and for one common format of double track railway. A significant benefit is demonstrated when track networks are configured to allow complex train interactions that are not limited to pairwise meets and passes. In addition, a novel claim is made that under some conditions of single track operation, a higher speed nonconforming train is less costly to the network. A method is proposed and demonstrated for applying this model to a practical railway network scheduling problem. When applying the model, the primary decisions are the choice of track segment boundaries and the dimension of the discrete time unit.
机译:该研究提出了一种新的铁路主调度问题模型,并将其应用于代表条件下的铁路线容量理论研究,并提供了将该模型应用于实际铁路调度问题的方法。由于无法评估不同服务网络的成本以及无法确定最佳调度,当代市场对不同类别的铁路运输服务的需求无法得到充分满足。在管理必须共享公用基础结构的不同服务的实体之间,也会发生成本和计划方面的争议。这个新模型将铁路时刻表表示为离散时间尺度上的二进制多商品流,并映射到超图上。目标函数将网络值计算为可行的火车路径,行进时延和目的地延误的线性组合。提出的研究估计了在现有的拥挤,均质的铁路网络流量上施加不合格的高速列车的成本。提供了两种格式的单轨铁路和一种常见格式的双轨铁路分析。当将轨道网络配置为允许复杂的火车交互时,不仅限于成对的相遇和通过,这将显示出显着的好处。另外,提出了一种新颖的主张,即在单轨运行的某些条件下,较高速度的不合格列车对网络的成本较低。提出并论证了将该模型应用于实际的铁路网调度问题的方法。应用模型时,主要的决定是轨道段边界的选择和离散时间单位的尺寸。

著录项

  • 作者

    Harrod, Steven.;

  • 作者单位

    University of Cincinnati.;

  • 授予单位 University of Cincinnati.;
  • 学科 Transportation.; Operations Research.
  • 学位 Ph.D.
  • 年度 2007
  • 页码 215 p.
  • 总页数 215
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 综合运输;运筹学;
  • 关键词

  • 入库时间 2022-08-17 11:39:18

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