Simulation Of Berths Scheduling For Crude Oil Dock

In the aim of becoming the hinge port of region and the world, competition among the domestic harbors turns red-hot gradually. Because of expensive transports and berth reconstructing price, the transportation ships anchoring time length in the harbor which affect the harbor economic efficiency and the social efficiency directly as well. In order to raise the harbor berth use ratio, reduce the ort time of the ships, decrease the expense and the cost, thus attract more ships to dock, we need to carry on a more reasonable effective plan to the harbor berth dispatching system.Based on the characteristics of crude oil dock and its actual operation process, the whole work process that from the ships'entering to theirs leaving the port is taken as the objects. Production operations of port is analyzed deeply, effectively dispatching simulation model of harbor berth dispatching system is formed, and under the circumstance of random arrival of ships information, the service and assistance are provided by the tugboat to assist to theirs "berthing" and "unberthing" based on the ships type and the position. Under the condition of dock existing loading capacity, berth occupancy, the average waiting time of ships in anchorage and tug utilization are used as optimization purposes.The simulation optimization module is added to get the reasonable tug quantity, based on which the tanker scheduling path with optimization is obtained; decision support is provided for port system by comparing optimization indexes.During the progress of modeling, the idea of concentrating scheduling and dispersing simulation is adopted in order to enhance the practical application of simulation model. That is, dispatching logics are managed in one unified module, which is convenient for the ports modify scheduling strategy according to their own situation.