Research On Passenger Flow Assignment And Operation Scheme Optimization Under Inter-cross Operation Mode In Urban Rail Transit

Interconnection is an important direction for the development of in-depth networked operations.Compared with the single-line operation organization model,the passenger flow characteristics and distribution rules under the interconnection operation model are more complicated.In order to take advantage of the transportation advantages of networked operations,it is necessary to in-depth study the rules of passenger travel and the characteristics of networked passenger flow,and to formulate and optimize the organization plan for passenger transportation in order to improve the quality of passenger transportation services.Most of the existing studies have established a macroscopic network passenger flow distribution model,and have not effectively considered the diversified and differentiated characteristics of the trains.With the implementation of the interconnection operation mode,the train operation will become more complicated,and the interaction and coupling relationship between passenger flow and train flow will become closer.To this end,this article uses the passenger flow data collected by the Chongqing Railway Group’s sorting center before and after operating cross-line train as the research object,analyzes the main characteristics of the cross-line passenger flow,establishes a passenger flow prediction model based on passenger flow characteristic values,and proposes optimization suggestions and adjustments for passenger transportation organization based on the passenger flow prediction results,and strategies to achieve the overall optimization goal of matching the actual passenger flow with the operating organization.The main research contents are as follows:(1)Analysis of the impact of interconnection operation mode on passenger flow characteristics.According to the actual passenger flow data of Chongqing Rail Transit Line 4 and the Loop line,the "pre-post" comparative analysis is adopted to analyze the changes of cross line passenger flow,and analyze the characteristics of inbound flow,transfer flow and section flow.The results show that the operation of cross line interworking trains can not only induce new passenger demand,but also affect the travel choice behavior of passengers;At the same time,the change of passenger flow is closely related to the train operation scheme.(2)Passenger flow assignment method under interconnection operation mode.Considering the characteristics of cross line passenger flow and interconnection operation,firstly,the passenger travel network based on train routing is constructed,and the k-shortest path search and effective path set construction methods are proposed;On this basis,a passenger route selection model and passenger flow assignment method based on hyper-path are proposed;Finally,an example of Chongqing Rail Transit is analyzed,and the results show that the method is effective.(3)Optimization of train operation scheme under interconnection operation mode.Aiming at the problem of traffic routing optimization,the alternative routing set search algorithm under the interworking mode is proposed,and then the optimization model is constructed with the goal of minimizing the enterprise operation cost and the minimum number of passengers without direct routing;Aiming at the optimization problem of express train stop scheme,based on the division of passenger types,an optimization model is constructed with the goal of saving time and the maximum number of passengers under the train.The example results of Chongqing Rail Transit show that the operation scheme optimization method proposed in this paper can not only save the operation cost of enterprises,but also improve the passenger service level.The method and model proposed in this paper can provide theoretical basis and method support for the interconnection operation of Chongqing Rail Transit.