Cooperative Optimization And Evaluation Of Train Working Diagram In Urban Rail Transit Network

At present,urban rail transit in large and medium-sized cities at home and abroad is booming.Urban rail transit is gradually changing from a single-line operation to a networked operation.Some large cities,such as Beijing,Shanghai,Guangzhou,Shenzhen and so on,have formed a networked situation.Compared with the single-line operation mode,the passenger flow characteristics and train operation coordination under the network integration mode are more unique and complex.Therefore,the research on the organization of urban rail transit network transportation is very urgent.This paper aims at cooperative optimization and evaluation of urban rail transit network train working diagram,from the perspectives of passenger demand and enterprise operation,based on the compilation theoretical study and characteristic analysis of the rail transit train working diagram,do in-depth research on network train working diagram evaluation and cooperative optimization of network train working diagram.Specific research contents include:(1)Based on the basic process of the urban rail transit train working diagram compilation,the paper studies and analyzes the methods of the train operation plan compilation under the common mode of full-length and short-turn routing,Y-type routing and express/local trains operation in recent years.It summarizes the basic methods of network train operation diagram compilation,and analyzes the characteristics of transportation organization in the network.(2)Based on the single-line train working diagram that designs independently,a transfer node is used as the entry point to analyze and study the passenger transfer process,train operation connection process,and transfer waiting time calculation to form a train connection optimization scheme of a transfer node.Based on this,an algorithm is designed to coordinate the train connection optimization schemes of the transfer nodes,and a network transfer connection optimization scheme is formed.And a coordinated optimization model of network train working diagram compilation based on transfer stations is established,and the coordinated optimization of network train working diagram is finally achieved.(3)The paper analyzes the practical significance and necessity of network train operation diagram evaluation for existing cable network and future network planning.Based on the analysis of the characteristics of single-line train operation and train operation coordination between lines,constructs a set of scientific and reasonable network train diagram quality evaluation system,and proposes a correct and feasible calculation method of the indexs to ensure the operability of the evaluation.(4)Combining the characteristics of the quality evaluation of the network train working diagram,it is analyzed that the network train working diagram evaluation belongs to the group evaluation problem which multiple parties participate in and the evaluation index sets are different.Then,fuzzy soft sets theory is proposed,and a quality evaluation method of network train working diagram based on fuzzy soft sets is designed.It is a method that combines quantitative and qualitative parts,which not only guarantees quantitative analysis but also effectively utilizes operation experience.