Abstract
In order to improve the transshipment efficiency of transit containers in the port or the port-type railway network container freight station (PRNCS) with the condition that each transit container matches a railway flat-car, this paper studied the optimization of operation path of the rail mounted gantry crane (RMG) in the loading and unloading track for containers transshipped directly from highway to railway. Based on the basic model of TSP, the paper constructed the optimization model for the operation path of RMG, and designed the Ant Colony Algorithm (ACA) to solve it, and then obtained the operation scheme of RMG having the highest efficiency. Finally, the validity and correctness of the model and algorithm were verified by a case.
Highlights
As the key node of transportation network for international containers, port-type railway network container freight station (PRNCS) is the hub for distribution of containers, and the junction of various transportation modes for the multimodal transport of containers
The main factor which restricts the transshipment e ciency of containers is that the time of “Second Customs Declaration” is too long
In the actual operation of some station, the dispatcher of PRNCS will make the “pre-manifest”, a er the “First Customs Declaration” is completed. e pre-manifest determines the matching relationship of containers and at-cars in advance, that is, each transit container arriving by sea matches a railway at-car
Summary
As the key node of transportation network for international containers, PRNCS is the hub for distribution of containers, and the junction of various transportation modes for the multimodal transport of containers. There are no scholars have used the TSP theory to solve the problem of scheduling optimization of gantry cranes, under the condition that each container matches a railway at-car, in the loading-unloading track. Erefore, this paper constructed an improved TSP model, and uses it to study scheduling optimization of gantry cranes, for containers transshipping from highway to railway, under the condition that each container matches a railway at-car. Problem Description e Carrier organizes container trucks coming to the loading-unloading zone, according to the arrival time of the container train These containers on trucks are loaded onto the at-car directly by gantry cranes. In order to complete the transshipment task of containers by the shortest operation time and minimize the number of containers that were unloaded to the ground as well, it is necessary to optimize the operation path of gantry cranes.
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