The Study On Passenger Assignment Optimization Between High-speed Railway And Existing Railway In Railway Corridor

The railway corridor is an important transport corridor connecting area center.With the increase of passenger travel demand and the vigorous development of railway transport in the corridor,the problems of rational cooperation between the high-speed railway and the conventional railway in the field of passenger flows share and trains operation,have gradually become the research focus.The optimal design must consider the relationships between the factors such as the choice of passenger travel behavior,the railway network structure in corridor,the passenger travel demand and so on,which is a kind of large-scale combinational optimization problem with multiple objectives and complex constraint conditions.Studying the passengers’ travel behavior and formulating rational passenger flows share and the cooperation scheme of the trains operating organization,will directly affect the effective allocation of transport resources in the corridor,and also are the key links and the theoretical difficulties of overall plan on the railway network.On the basis of the existing research results,the passenger flows share model and optimal cooperation model of the trains operation are established in this paper from the viewpoint of system engineering with using the related research methods of combining quantitative analysis with qualitative analysis,combining empirical study and theoretical study,operational research theory,statistical analysis,behavior science,economic analysis,optimization theory,and system modeling principle,aiming at providing the theoretical basis for the optimization and adjustment of the actual cooperation scheme in railway corridor.The main contents of this paper are as follows:(1)By analyzing the existing achievements,it analyzes the definition of the railway corridor cooperation from the perspectives of the cooperation theory and the corridor evolution.On the basis of drawing on the existing achievements in related fields,this paper summarizes the research status of the related issues about the rational optimal cooperation in railway corridor,and it objectively analyzes the key issue needed a further solution,and it puts forward the significance and ideas of the study in this paper.(2)Based on the actual investigation of passengers in Baoji-Lanzhou railway corridor,it empirically studies factors influenced the characteristics of passenger travel,the structure of passenger flows and the choice of passenger travel mode by using the statistical method,and it builds passenger travel decision-making table by using the rough set theory to make attribute reduction and value reduction on factors,and finally obtaining a more refined decision rule.On this basis,using the kernel value method and the logic judgment method makes the value reduction,and it obtains the minimum decision rules,and then according to the minimum passenger travel information to match the passenger travel choice,it can design personalized railway travel products program for passengers.Through the calculation of attribute membership degree,it analyzes the dependence degree from travel choice on each factor.These above methods achieve the purpose of mining the passenger travel knowledge by using rough set theory.(3)In this section,it proposes an initialized central point algorithm based on attribute weighted distance and density,and it designs a K-means cluster algorithm based on the attribute importance degree of rough set.Through the algorithm simulation experiment,it can make cluster and segment the passenger market preferably.On this basis,it studies the passenger flows share by using the expected utility theory,and by introducing the utility value weight based on the attribute importance degree of the rough set,it proposes the improved Logit model with the rough attribute importance degree to calculate the travel mode share rate of the segmented passenger market.(4)According to the railway network structure in corridor,the cooperation problems in the railway corridor are divided into the cooperation in trains running on parallel path and cooperation in trains running crossing the line.For the cooperation problems on parallel path,considering the characteristics of mutual independence between the high speed railway and the conventional railway in the corridor,from the viewpoint of the system optimization,setting the minimum railway operation cost and the maximum passenger satisfaction as the objectives,and considering the capacity constraints of station and section,passenger flows demand,capacity release of existing lines and station service frequency as constraints,the multi-objective optimization model is established.And a non-dominated sorting and multi-objective genetic algorithm is designed to solve this optimization model.(5)For the condition of the crossing lines trains with the character of the high speed railway and conventional railway sharing common station,and the trains can cross from high speed railway to the conventional railway at the node station,which determines the complexity of the problem.In the same way,by taking the minimum cost of railway enterprises and the maximum passenger satisfaction as the objectives,and considering the constraints of various capacity constraints,passenger flows and service frequency after increasing cross line trains,the multi-objective optimization model is established,and a genetic algorithm is designed.(6)with the background of Baoji-Lanzhou railway corridor,based on the general theory and method of multi-objective optimization theory and non-dominated genetic algorithm,using the relevant model proposed in this paper,it makes cluster segment of the passenger market in the corridor,calculates the share rate and the sensitivity of each transportation mode,and it also formulates trains’ cooperation program in the railway corridor under the conditions of the parallel path and the cross-line,and it analyzes the optimization results.Considering the factors of capacity release of existing lines,passenger flows fluctuation,the change of passenger travel choice,it makes a further study on evolution of trains operation cooperation in Baoji-Lanzhou corridor.The results of case analysis show that the segment cluster algorithm of passenger market in railway corridor,the model of travel modes share,the cooperation model under the condition of parallel path and cross line established in this paper are reasonable and effective.The pareto solution obtained by optimization algorithm,and cooperation evolution law under each kind of conditions can provide diversified program options for railway enterprise decision making.