Optimization Of Train Working Diagram For Urban Rail Transit Based On Passenger Flow Matching

Train working diagram is the basis for urban rail transit enterprises to organize train operation;it is also the basis for passengers arranging travel plans.It is an important reflection of the overall service level of urban rail transit system.Scientific and efficient train working diagram can not only ensure the safety of train operation,but also help to realize the economic and social benefits of enterprises,and also provide high-quality and efficient travel services.The train working diagram is closely related to the passenger demand.When the capability provided by the diagram matches the passenger flow demand,the urban rail transit system can not only satisfy the passenger demand but also bring its own capability into full play.Considering the general trend of urban rail transit network operation,this paper takes the urban rail transit network as the research object,comprehensively analyzes the relevant research at home and abroad,and the concept,characteristics,influencing factors and optimization strategies of train working diagram are expounded.Based on the study of passenger route choice behavior in urban rail transit,this paper analyzes the related factors affecting passenger route selection,constructs a generalized travel cost function,improves the efficient path search algorithm and finally constructs passenger flow assignment model.On the basis of the results of passenger flow assignment,the method to measure the matching relationship between train working diagram and passenger flow demand is put forward and then discuss the train working diagram optimization.Concrete research content is as follows:(1)Analysis and elaboration of the relevant theories on the train working diagram of urban rail transit.Fully recognize the concept and characteristics of the train diagram of urban rail transit systematically analyze the influencing factors of the train working diagram,and summarize and analyze the strategy of optimizing and adjusting the train working diagram.(2)Study on the passenger route choice behavior of urban rail transit.Based on the discussion of the factors affecting passenger route choice behavior,the paper quantifies the effects of comfort and transfer on the passenger psychological perception,then constructs the generalized travel cost function,and improves the effective path search algorithm.And the passenger flow assignment model is constructed and solved by MSA algorithm.(3)Evaluation of the matching relationship between the train working diagram capability and passenger flow demand of urban rail transit.The matching degree is measured from the micro and macro levels.On the one hand,the matching evaluation algorithm between the train working diagram and passenger flow demand is designed.On the other hand,the matching degree is calculated by multi-objective synthesis method,and the relationship between them is analyzed at multi-levels.(4)Optimization and adjustment of train working diagram based on evaluation results.Whether it is necessary to optimize the train working diagram based on the calculation value of the capability matching degree,and discuss the possible operation situation according to the evaluation value of the five components.The train diagram is optimized from three aspects of time-division optimization,section optimization and direction optimization.(5)Taking Nanjing Rail Transit as an example,the feasibility of the train working diagram optimization method based on passenger flow matching is verified.