| With the continuous development of my country’s urban rail transit,the urban rail transit operation mode has entered the era of networked operation from the traditional single-line independent operation.The diversified travel needs of passengers have brought new challenges and higher demands to the entire rail system.Therefore,the interconnected operation mode of urban rail transit has gradually become an important development trend.In this context,exploring the passenger flow characteristics,typical operation mode types,and train operation schemes when the lines are interconnected is conducive to the rational allocation of resources in the entire rail transit system and the improvement of the service quality of operating companies.Therefore,this thesis further explores the optimization of urban rail transit train operation schemes under the common "Y/T" interconnection operation mode.The main research contents are as follows:(1)Summarize the connotation,advantages,and basic conditions of the interconnection model,and analyze and summarize the typical operation model of the interconnection in combination with domestic and foreign examples.Next,extract the influence factors of passenger flow under the interconnection operation mode of urban rail transit,analyze the time and space characteristics of rail transit passenger flow,and analyze and summarize the main types of passenger flow under the background of interconnection,as well as the passenger flow conditions that need to be met when adopting the interconnection mode.Finally,it focuses on the elements of the train operation plan: train formation plan,train operation frequency,train stop plan and train crossing plan,and discusses the appropriate operation plan under the interconnection operation mode.(2)According to the travel characteristics of passengers under the background of interconnection,a passenger flow allocation method considering travel strategy is proposed and verified.First of all,the behavior of transferring to subsequent trains on the same platform is introduced into the passenger travel process,and an urban rail transit service network considering this behavior is constructed to fit the characteristics of passenger travel under the background of interconnection.Secondly,the optimal travel strategy search algorithm is used to generate the strategy set,and the optimal travel strategy effective path search algorithm is designed to generate the passenger travel route set.Finally,a numerical example is used to verify and compare the passenger flow allocation method,showing its advantages,and at the same time reflecting the diversity of passenger choices and the real travel situation of passengers under the background of interconnection.(3)Construct an optimization model of urban rail transit interconnection and interoperability schemes,with the goal of minimizing "enterprise operating costs and passenger travel time",taking into account the passenger flow of the section,the basic departure frequency,the number of line intersections,and the number of intersections covered by sections,the intersection includes multiple constraints such as the number of sections and the departure interval of the section.A dual-objective optimization model is established with the operating frequency and crossing scheme of urban rail transit trains as decision variables.Based on the algorithm,a set of Pareto optimal solutions is obtained by design and solution,and the operating company can choose the appropriate train operation plan according to the actual situation.(4)Design a practical example to verify the model.Analyze the basic situation and passenger flow characteristics of the two lines,use the designed algorithm to solve a set of Pareto optimal solutions,compare with the train operation plan under the independent operation mode,and evaluate and analyze the optimization effect to obtain the interconnection operation mode The following train operation plan can greatly reduce the operating cost of the enterprise and the travel time cost of passengers,improve the operating efficiency of the enterprise,and verify the optimization model and algorithm proposed in this thesis. |
