| During the 14 th Five-Year Plan period,my country’s urban rail transit will fully enter the stage of network operation at the functional level.The interconnection between lines is the basis of network operation,which is of great practical significance to reduce the travel time of passengers and improve the travel experience.Considering the large differences in existing equipment standards and technical standards,it is difficult to achieve cross-line operation.In the planning of new lines,the potential of network interconnection can be first explored,the feasibility and adaptability of interconnection can be studied,and the theoretical basis and practical experience can be provided for the realization of network operation.The main contents of this paper are as follows:(1)The identification process of interconnection nodes is proposed.The second chapter summarizes the interconnection requirements of urban rail transit,mainly including passenger flow requirements,technical requirements and management requirements.Combined with demand analysis,the node identification index and its calculation method are determined.The interconnection solution construction cost estimation method is proposed to confirm the node type.Based on the network structure,index calculation results and construction cost calculation results,the interconnection nodes and lines are determined according to the node identification process.(2)Establish an optimization model for the driving plan under the conditions of interconnection and interoperability.The CDB plan optimization model is constructed on the basis of summarizing and analyzing the influencing factors of CDB plan formulation and determining the principle of alternate sets of intersections.The model takes the minimum operating cost of the enterprise and the shortest passenger travel time as the optimization goal,and takes the number of roads,departure interval,passenger flow demand and interval train capacity as constraints.This paper studies the fitness function in the NSGA-II algorithm.The role of constraints in non-dominated sorting and crowding degree calculations is determined.The NSGA-II algorithm is used to solve the optimization model of the opening plan.(3)A traffic-based passenger flow distribution model and algorithm for urban rail transit is established.The effective route screening principle is determined,and based on this principle,the breadth-first effective route search algorithm based on the road resistance function is determined,and the road resistance function is defined by travel time,transfer times and transfer time.Combined with the road resistance function,a passenger flow distribution model of rail transit based on the MNL model is established.The concept of 1-car reachable route and the solution flow of passenger flow allocation based on intersection are proposed.According to the passenger flow distribution solution process,the passenger flow of the one-time-accessible route is solved and merged into the corresponding intersection.(4)Determine the development plan model and passenger flow distribution model cycle iterative research ideas and formulate iterative solution rules.The original OD passenger flow,travel plan and line network data are input into the passenger flow distribution model to determine the current passenger flow distribution results: passenger flow in section sections.The results are fed back to the CDB plan model to determine the traffic situation of the new interconnection.The newly opened intersections and their departure frequencies are substituted into the passenger flow distribution model to solve,and iteratively.The definition of the matching degree of capacity and capacity is proposed,and it is determined that the iteration stop condition is that the difference between the two iterations of the capacity and capacity balance is less than the set value.(5)A case study of City Z.It is determined that the interconnection node is the transfer node of Line 2 and Line 4.The NSGA-II algorithm is applied to solve the optimization model of the opening plan.The passenger flow distribution method based on efficient path decomposition is applied to solve the passenger flow distribution.After10 iterations of the loop,the traffic opening situation is finally determined;the matching degree of transport capacity has increased from 49.91% to 52.25%.This paper totally has 43 figures,30 tables and 74 references. |
