Abstract
This paper presents an optimal solution for handling tasks at Busan Container Port in South Korea. Currently, there is a monorail transportation system being constructed and supposed to be ready in use in 2045. It is a project in association with Korean Government that aims to increase the utility rate at Busan Port – one of the biggest container port in the world. At the moment, the main transport mean at Busan Port is truck – whose speed is about 40-50 km/h, however this traditional method leads to a low productivity and traffic congestions on the road. An innovation is to build a monorail system that could operates at high speed (about 80-90 km/h) along the entire port to transfer standardized containers. This new transportation system is expected to strongly reduce the delay in transporting as well as increase the overall efficiency for the system. In new system, there are transport vehicles called shuttles that would move on the rail in only one direction, and to turn back in the opposite way, there are some special stations called change stations that would direct the shuttles into the other lanes – which is similar to the lane driver systems on the railway. Containers at each inner terminal in Busan Port will be grabbed onto the shuttles by special equipments called loaders – a kind of giant automated manipulator that would load or unload whenever a shuttle requires. To optimize the operation, we introduce a heuristic algorithm called Greedy Algorithm for scheduling tasks and assigning tasks – two major actions in a cycle work that significantly affects to the system’s performance. First, the containers at each loader position will be sorted in a proper sequence, and then the sorted schedule will be assigned to proper shuttles in order to lower the total working time and delay time as much as possible. The overall performance is simulated by MATLAB software, including the result charts showing the main criteria points, in order to highlight the advantage of new transportation system.
Highlights
The monorail system project at Busan Port is a kind of Inter Terminal Transport (ITT) system motivated by similar transport systems in the world 1–4
About simulation and optimization approaches for ITT system, many studies have been made based on the model of Port of Rotterdam (Maasvlakte I & II Project 9,10), since it is the largest container port in Europe with many transport modes and vehicle types (MTS, AGV, ALV, barge, vessel, train...) 10
Full layout of the monorail system is modelled by MAtrix LABoratory (MATLAB) as shown in Figure 5, presenting the positions of terminals and change stations as well as measure points (Q points) on the rail
Summary
The monorail system project at Busan Port is a kind of Inter Terminal Transport (ITT) system motivated by similar transport systems in the world 1–4. Since this is a monorail, all shuttles are directed one way only. Some special stations called change stations, laying at two ends of the terminal and acting like lanedrivers on the railway, are responsible to direct the shuttles into other lanes, as described in detail in Figure 4 14. A buffer on the change station (turn zone) allows the shuttles to wait until the lanes change correctly. Our duty in this project is to analyze the general performance of the monorail system
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