Optimization Of The Ore Bulk Carrier Route In The Yangtze River Channel Considering The Tide

Since China's entry into the WTO,domestic and foreign trade cooperation has become more frequent,and it has been difficult to meet increasing trade demand solely by inland transportation.Due to its large volume and other characteristics,maritime transportation has become more and more important in the process of international trade.However,due to various uncertain factors in reality,the transportation process and market demand are constantly changing.The Yangtze River is China's first inland waters.Since 2010,its freight volume has ranked first in the world's inland waters.Unlike sea navigation,ships need to consider the environment of the inland river during navigation.Tide,as one of the characteristics of ship inland water transportation,is mainly caused by the periodic movement of seawater in the vertical direction of the sea surface caused by the gravity of the seawater.Near the Yangtze River Channel in China,due to its position,ships sailing in this water area are affected by half-day tide all year rounds that is,the tide fluctuates twice a day.Due to the influence of the inland waterway level and the tide effect of the port,there are certain restrictions on the cargo transportation operations of bulk ships.Therefore,how to efficiently and reasonably plan the transportation route of inland ore bulk ships has become an important issue.This article introduces the research background and significance of bulk shipping at home and abroad,and discusses related theoretical knowledge.Although many experts pay attention to the optimization of shipping routes,relatively few scholars have studied the optimization design of inland shipping routes.In the total operating cost of a ship,fuel costs occupy a very large proportion,and the consumption of fuel is closely related to the carrying capacity of the ship and the speed of the ship.At the same time,although the inland river tide phenomenon cannot directly affect the navigation cost of the ship,it has a significant impact on the time of entry and exit of the ship and the safe driving of the ship.The tide has a certain impact on the water depth of the port.When the ship's draught is greater than the safe water depth of the port,the ship needs to wait for the high tide stage of the port,enter the port 'by the tide and leave the port before the ebb threshold.According to the characteristics of the inland rivers of the Yangtze River Channel and the current status of transportation of inland ships,this paper provides the best transportation route for the ore port clusters of the Yangtze River Channel.When building the model,it is mainly considered that the ship is affected by the channel level and the daily tide changes of the port during the sailing process.The fuel consumption of the ship is affected by the combination of ship speed and load capacity.The proposed model is applied to practical cases,and it is found that there are certain limitations when using the solver to solve large-scale examples.Therefore,based on the genetic algorithm,we designed a solution for inland water transportation in this paper.Through comparison of small-scale examples,we found that the solution accuracy is approximately equal,but the solution efficiency is significantly improved,further verifying the efficiency of the algorithm Sex.