Research On Optimization Of High-speed Railway Timetable For Air-rail Intermodality Service

In recent years,the scale of China's high-speed railway network continues to expand,the number of airports has increased significantly,which makes it possible to carry out Air-Rail(AR)intermodality Service.AR intermodality service can effectively integrate the transportation network of aviation and railway,improve the comprehensive transport system structure,improve the coverage and accessibility of medium and long-distance travel,respond to the development strategy of "A country with strong transportation network",and have broad market prospects.However,due to the separation of construction and operation for a long time by transport modes,in this stage China's AR intermodality service highlights the state of "local cooperation","inefficient connections".Among them,the lack of coordination between high-speed railway timetable and flight schedule is the most prominent problem,which restricts the development of AR intermodality service.Therefore,this thesis studies the optimization of high-speed railway timetable for AR intermodality service,realizes the "seamless connection" of AR intermodality service in time by optimizing and adjusting the high-speed railway timetable,so as to better meet the travel needs of passengers and improve the service level of AR intermodality.The main research contents of this thesis are summarized as follows:(1)Research on transfer problem of AR intermodality service.This thesis compares and analyzes the foreign and China's AR intermodality service,summarizes the key issues of the development of China's AR intermodality service.From the perspective of improving the service quality of AR intermodality,analyzes the factors that affect the transfer and connection of AR intermodality service,provides a theoretical basis for the establishment of the optimization model of high-speed railway timetable.(2)Construction the timetable optimization model for AR intermodality service.Based on the optimization strategy of timetable adjustment,the objective function is to maximize the total service frequency of AR intermodality service and minimize the total adjustment time of railway timetable,and comprehensively considering the constraints such as train dwell,adjustable time window,interval running time,safety interval,crossing time,maintenance period,AR intermodality connecting inbound and outbound flights,connection frequency of different categories of flights and emu connection.The timetable adjustment model(M1)is established.Based on the optimization strate gy of add trains,the model of adding train paths timetable(M2)is established,and the constraint transformation method is designed to solve the models.(3)Case study.Take Shijiazhuang Zhengding Airport as the case study object,set up three different optimization strategies cases to analyze the impact of different optimization strategies on the adjustment of timetable and the service quality of AR intermodality service,in order to verify the effectiveness and feasibility of the model and algorithm.The influence of transfer time,arrival and departure time adjustable time window and connection frequency of different types of flights on the results of different cases is analyzed,which provides theoretical basis for the design of AR intermodality service products.