Research On Optimization Of Train Operation Plan For Y-type Rail Transit Line

The preparation of the rail transit train operation plan is the basic content of the urban rail transit organization department,and plays a decisive role in ensuring the normal operation of the rail transit line systems.As the urban rail transit line gradually develops into the line network structure,the types of lines in the line network are more and more diversified.As a special line type,the Y-type rail transit line can fully satisfy the scattered distribution from the main city to the urban fringe.Passenger demand.In this paper,the optimization of Y-type rail transit line scheme is taken as the research direction.Based on the summary of relevant research at home and abroad,the following research work is carried out:(1)Starting from the introduction of the basic types of rail transit lines,the concept of Y-type rail transit lines is introduced.The formation reasons and circuit characteristics of Y-type rail transit lines are introduced.The concept and content of the train operation plan are clarified,the steps of the train operation plan are described and analyzed,and the reasons and contents of the current rail transit train plan optimization are Put forward.(2)Explain the principle of the train operation plan for the Y-type line,and introduce and analyze the factors affecting the train operation plan of the Y-type line from four aspects:passenger flow distribution,passenger travel demand,equipment conditions and economic benefits.An overview of the principles for the development of Y-type rail transit trains and the need to optimize existing ones(3)Selecting a main line as the research target,based on the consideration of the overall economic benefit and the passenger’s travel demand,the optimization model of the multi-objective function is established by selecting the minimum passenger travel time and the shortest train travel distance,combined with the model hypothesis.The situation constrains the decision variables.After normalizing the objective function by linear weighting,the multi-objective function is converted into a single-objective function,and then solved by GIS software using genetic algorithm.(4)Taking Dalian Metro Line No.3 as an example,combining its line conditions and passenger flow characteristics,it analyzes its driving plan and proposes the necessity of optimization.Then,the optimization plan for train formation and stop plan is proposed for its operation plan.Finally,the Y-line train operation plan optimization model established in this paper is used to optimize Line 3,and the optimization result is compared with the current operation plan.The optimal solution has the conclusion of greater transport efficiency than the current solution.Finally,the sensitivity analysis of the optimal scheme is carried out with the upper limit of the full load rate of the train and the turning point of the branch line as variables.It is obtained that when different weight values are taken,the indicators of the optimal scheme will slightly float with the change of the upper limit of the train full load rate and the return point.