Key Resources Scheduling Optimization Theory And Method Of Railway Container Terminal

ABSTRACT:Container transportation is an advanced transportation mode, and plays an important role in freight transportation of international and domestic trade. As an important form of container transportation organization and developing direction of railway freight transport, railway container transportation integrates the advantages of container and railway transport, and has the characteristics of safety, convenience, energy-saving, environmental protection and door to door transport. Railway container terminal is a vital platform of railway container transportation, and is different from traditional railway container stations in function, layout, operation, organization and management. The production and operational of railway container terminal has a significant impact on transportation quality, comprehensive efficiency and service level of railway transportation network and multi-modal transport system.This paper takes key resources of railway container terminal as research object, takes key resources scheduling optimization as research target, and focuses on key resources scheduling optimization theory and method of railway container terminal. The major research contents are summarized as follow:(1) Definition of key resources in railway container terminal. According to the analysis of function, layout, resource classification and operation process of railway container terminal, combining with composition of maritime container terminal, the key resources in railway container terminal are defined.(2) Architecture construction of key resources scheduling optimization in railway container terminal. According to the analysis optimization target and objective, establish the frame of key resources scheduling optimization. For theoretical support of subsequent studies, architecture of key resources scheduling optimization is built under the set analysis of objective functions, decision variables and constraints.(3) Study on key storage resources scheduling optimization. A two-stage optimization model for key storage resources scheduling optimization in railway container terminal is proposed under the architecture of key resources scheduling optimization. The first stage is workload balance model, whose objective is to balance workloads of inbound containers among blocks, and evenly allocate inbound containers to each block. The second stage is container slot allocation model, whose objective is to minimize overlapping amounts of storage. (4) Study on key handing resources scheduling optimization. The study takes handling resources as research target, and takes handling sequence optimization of rail mounted gantry crane as research objective. According to the different handling areas, handling operation mode and amount of handling lines, three rail mounted gantry crane scheduling optimization of railway container terminal are proposed under the architecture of key resources scheduling optimization. The makespan and unloaded time of rail mounted gantry crane handling operation is compared among three handling modes.(5) Study on integrated scheduling optimization between key storage resources and key handling resources. According to the influence, restriction and feedback analysis between container slot allocation optimization and rail mounted gantry crane scheduling optimization, a bi-level programming model of integrated scheduling optimization between key storage resources and key handling resources is proposed under the architecture of key resources scheduling optimization. The makespan and unloaded time of rail mounted gantry crane handling operation is compared between integrated scheduling optimization and separate scheduling optimization.According to the study on key resources scheduling optimization theory and method of railway container terminal, the paper can not only enrich the basic theory of railway transportation organization and multi-modal transport system, and provide theoretical support for the planning, construction and operation of railway container terminal, but also optimize the storage and handling scheduling, and has extensive engineering application value for railway container terminal.