Research On Passenger Transportation Mode Of High Speed Railway On Busy Railway Line

The operating mileage of high-speed railway lines in China is increasing day by day,at the same time,the scale of operations is also expanding,and the demand for passenger flows is growing more rapidly.In the economically developed central and eastern regions,high-speed railway lines are busy,and the peak demand is often unsatisfactory.Under this background,it is of great practical significance to study the capacity utilization problem of busy trunk lines.The performance in terms of indicators is to improve the capacity utilization rate and meet the needs of passenger flow.The passenger flow transportation mode is actually a prerequisite for the development of train line plans and operation diagrams,and it has a decisive foundation for capacity utilization.This paper will study the passenger flow transportation mode from the perspective of capacity utilization.The main research contents are as follows:(1)Sort out the classification of passenger flow transportation modes of high-speed railways,analyze their characteristics,and elaborate the impact of passenger flow transportation modes on the utilization of throughout capacity and the utilization of carrying capacity.Combined with the status quo of passenger flow transportation mode and capacity utilization status of China’s busy main line of high speed railway,the adaptability of China’s busy main line of high speed railway to passenger flow transportation mode combining direct and transfer is proposed.(2)A design method of passenger flow transportation mode that splits the mediumand long-distance direct trains into short-and medium-distance trains with the designated transfer station as the boundary is proposed.It also elaborates the design flow and principles of the specific passenger transportation mode,and constructs a split train selection model with the largest passenger flow sharing rate as the objective function.(3)Aiming at the design result of passenger flow transportation mode combining direct and transfer,the model of train diagram is constructed based on the space-time network to optimize the time and space of the train under different passenger flow transportation modes,solve the problem of train transfer connection problem and schedule the cross-line vehicles of fixed time window.The Lagrange relaxation algorithm solving the sub-problem by shortest path based on dynamic programming is used.(4)With the Beijing-Shanghai high-speed rail and its connecting lines as the background,Jinan West Station and Xuzhou East Station were selected as the transfer stations to design passenger flow transmission modes with different transfer ratios,and the train operation plan and passenger flow sharing of different passenger flow transmission modes were obtained.And on this basis,the train diagram of the different passenger flow transportation mode is scheduled using the model.The passenger flow sharing rate results and train diagram results are used to compare and analyze the utilization of the line throughout capacity and carrying capacity of the direct mode and the transfer mode.