水电开发工程铁路中转储备系统货车物流调度

发布时间：2018-10-16 17:45

【摘要】：近年来,相关国家政策的出台实施,促进了水电开发产业的迅速发展。水电开发工程的建设成效很大程度上依赖于物资供应链的有效运行。由于水电开发工程选址多偏僻,所需物资往往跨区域采购和运输,物资供应及需求的不确定性大,铁路中转储备系统作为物资供应链中的物资枢纽十分关键。当前中转储备系统运行管理中的调度计划多依据经验制定,运用优化理论对其进行研究有利于提高其运行效率,具有重大现实意义。本文以我国水电开发工程物资供应链为背景,深入分析铁路中转储备系统的运作流程,选取作业效率亟待提高的物资进站阶段进行优化研究;物资进站管理的本质是对到站货车进行物流调度,依据决策类型的不同将货车物流调度问题分解为货车分组和组内货车顺序编排两个子问题;接着以最小化货车压站时长和最小化货车组卸载时长为目标分别对两个子问题建立数学优化模型,考虑到不同机车资源调度模式在货车分组子问题描述中的差异,建立了机车通用和机车专用两种调度模式下的货车分组模型;以数学优化模型为依据,结合0-1线性规划和启发式算法设计了一种三阶段优化调度方法;选取某转运站实际运行数据,进行调度优化计算实验,获得货车物流调度优化方案并分析结果。实验结果表明经本文提出的方法优化后两种机车调度模式下的货车物流调度方案中,货车压站总时长均优于实际情况且及机车资源配置效率更高;两种模式之间,大多数情况通用模式调度方案表现更优;且经分析发现,当前这类中转储备系统物资进站阶段的作业瓶颈存在于对位卸载环节。
[Abstract]:In recent years, the implementation of relevant national policies has promoted the rapid development of hydropower industry. The construction effect of hydropower development project depends on the effective operation of material supply chain to a great extent. Because the location of hydropower development project is more remote, the material needed is often purchased and transported across regions, and the uncertainty of material supply and demand is great, the railway transit reserve system is very important as the material hub in the material supply chain. At present, scheduling plans in the operation and management of transit reserve system are usually made according to experience. It is of great practical significance to use optimization theory to study them to improve their operational efficiency. Based on the material supply chain of hydropower development engineering in China, this paper deeply analyzes the operation process of railway transit reserve system, and selects the material entry stage which needs to be improved urgently to optimize the operation efficiency. The essence of material entry management is to carry on the logistics dispatch to the arriving freight car. According to the different decision type, the freight car logistics scheduling problem is decomposed into two sub-problems: the freight car grouping and the order arrangement of the freight car in the group; Then, aiming at minimizing the time of truck pressure station and minimizing the unloading time of freight car group, the mathematical optimization models of the two sub-problems are established respectively, considering the difference of different locomotive resource scheduling modes in the description of freight car grouping sub-problem. Based on the mathematical optimization model, a three-stage optimal scheduling method is designed based on 0-1 linear programming and heuristic algorithm. Select the actual operation data of a transfer station, carry on the dispatch optimization calculation experiment, obtain the freight car logistics scheduling optimization scheme and analyze the result. The experimental results show that the total time of freight car pressure station is better than the actual situation and the efficiency of locomotive resource allocation is higher in the two locomotive dispatching modes after the optimization of the two locomotive dispatching modes by the method proposed in this paper, and between the two modes, the total time of truck pressure station is better than that of the actual situation. In most cases the general mode scheduling scheme performs better and it is found by analysis that the bottleneck of this kind of transfer and reserve system in the phase of material entry and unloading exists in the phase of pairwise unloading.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U294.12

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