Research On The Optimized Approach To High-speed Railway Station Access Distribution

The capacity of high-speed railway stations greatly affects the smooth flow of the road network.Compared with ordinary passenger railway stations,passenger transportation equipment is more advanced and the transportation organization method is more scientific.With the increasing number of trains received and dispatched at the current station,it is even more important to formulate a reasonable train route arrangement plan,which is conducive to improving the overall adaptability of the station and the efficiency of transportation operations.High-speed railway stations carry out a large number of passenger operations on a daily basis.The use of turnouts and arrival and departure lines in the throat area has become a key node that affects the capacity of the entire station.How to improve the efficiency of the existing equipment to complete the task of receiving and dispatching trains is an improvement of the transportation organization service of the station.Levels need to focus on the puzzle.The problem of station access allocation is to optimize the station's capacity on the premise that the layout of the yard,the use plan of the stock road,and the train operation map are certain.Based on the actual production situation of the station,this paper focuses on the comprehensive use of turnouts and arrival and departure lines in the throat area,establishes a multi-objective optimization model of the station network topology and train route assignment,and uses the genetic algorithm as the basis to solve the problem of route assignment for high-speed railway stations.Solve.The research contents of this paper are as follows:(1)Analysis of station operation content.Firstly,the paper introduces the classification of high-speed railway stations,basic passenger station equipment,analyzes the technical operation process of departure,arrival,turn back and passing trains in detail,discusses the factors affecting the operation of departure lines,summarizes the time of train route occupying throat area turnout and arrival departure line,the shortest interval time of arrival departure line occupation and buffer time of arrival departure line occupation.(2)Construct the network topology of high-speed railway stations.Taking Baoji South Station as an example,the station network topology is constructed,and the labeling method is used as the core design algorithm to generate a station access table.(3)Establish a multi-objective optimization model for route allocation.Propose model assumptions and explain related variable symbols,consider constraints such as the uniqueness of the train's occupied lanes,avoid route conflicts,and meet and meet constraints such as the safety interval time of trains.Equilibrium use of the lanes,the shortest travel distance within the passenger station,and reception and departure The minimum cost of the train route is the goal.The analytic hierarchy process is used to determine the weight of each goal in the objective function.A station route allocation optimization model is established and the model parameters are determined.(4)Algorithms for solving multi-objective optimization models based on genetic algorithms.Encode in the form of natural numbers,determine the value of fitness function by the weight of each target,use the roulette method to select and identify,save the individuals with the highest fitness,and finally perform crossover and mutation operations to deal with constraints..(5)Taking Baoji South Station as an example,using matlab to implement the genetic algorithm,comparing the optimized stock road usage plan with the original scheme,and proving the effectiveness of the model and algorithm.