Research On Optimization Technology Of Train Connection In High-speed Railway Hub Station

With the continuous expansion of the scale of high-speed railway network,more and more people choose high-speed railway to travel.Due to the increasing demand for passenger flow,the railway transportation department adopts direct and transfer modes to complete passenger transportation.As the core unit of high-speed railway,high-speed railway hub station is an important node for high-speed train passing and passenger transfer.A large number of passengers need to transfer at the hub station,which must ensure the quality of passenger transfer,meet passenger travel and transfer needs,and maximize the convenience of passenger travel.However,with the increase of high-speed railway transfer passengers,the transfer problem of passengers at hub stations is becoming more and more serious.The theory and method of train connection scheme optimization adapting to the actual situation of high-speed railway in China need to be improved.Therefore,under this background,it is of great significance to study the optimization of passenger train connecting scheme at high-speed railway hub stations.Firstly,based on the research of scholars at home and abroad,this paper summarizes and analyzes the current problems related to the existence of train connecting,and determines the research direction and content of this paper.Then the basic concept of passenger train connecting scheme of high-speed railway hub station is given,and its influencing factors are analyzed.On this basis,the functions and principles of train connection scheme optimization are summarized,and the relationship between train connecting scheme and operation scheme and operation diagram is explained.Secondly,this paper analyzes the train transfer and connection from the two aspects of train connection and passenger transfer.The train connection mainly analyzes the combination of continuation relationship,directionality and connection time.It clarifies that there are three different combinations of train connections,and summarizes the time constraints of different types of trains.The passenger transfer aspect mainly analyzes the passenger transfer process and its time composition.Combined with passenger transfer and train connection process,the train transfer and connection characteristics are comprehensively analyzed,and two major goals of optimization of train transfer and connection are proposed: maximizing passenger flow and minimizing transfer waiting time.Then,according to the research of train connection and passenger transfer,it is clear that the optimization problem is to optimize the arrival and departure time of the transfer train and the continuous train,and to maximize the passenger flow and minimize the passenger transfer waiting time as the objective function.Considering the constraints such as train connection time,train stopping time,periodicity,station passing capacity and minimum safety interval time,an optimization model of train transfer and connection is established(the model of passenger train connection relationship has been established and the model of connection relationship has not been determined).Finally,according to the characteristics of the optimization model,the genetic algorithm is designed and solved by using MATLAB programming software.At the same time,the calculation example is constructed.On the basis of determining the train operation plan,optimize the arrival and departure time of the departure,final arrival and passing train of the high-speed railway hub stations in a certain cycle,determine the stop time and sequence of the train,analyze the average waiting time of passengers,and verify the feasibility of the optimization model.