Optimization Research On Capacity Utilization Of Beijing-Shanghai High-speed Railway

In this paper,we aim to improve the passing capacity of high-speed railways,and from the comparison of the passing capacity of high-speed railways at home and abroad,the factors that affect passing capacity,the technical measures and the feasibility of passing capacity to carry out related research.And relevant research work is carried out from the aspects of coordinated optimization of train operation plan and passing capacity,improvement of passing capacity of typical routes and so on.This paper analyzes the difference between the adoption of high-speed railways in China and abroad,and summarizes the enlightenment of the high-speed railways in China through the improvement of their passing capacity.The influencing factors on the passing capacity of high-speed railway are analyzed by studying factors such as train interval,train type,running time of train,quantity and time of stopping train,distance between train stations and train departure station.In addition,a comprehensive demonstration is given on the technical measures and feasibility of improving the passing capacity of high-speed railway and the measures to improve the passing capacity of transport organization mode,proportion of high and medium speed trains,train intervals,station throat length,crossing speed and signal interlocking conditions.The research uses a combination of theoretical calculation and dynamic simulation to demonstrate the feasibility of optimization measures.The paper deeply studies the optimization of the train operating structure such as the type of train,the proportion of train opening and the sequence of train operation,and establishes the optimization model of stopping plan based on the service frequency of nodes and how to solve the matching problem between stop and passenger.Through the use of mixed-integer program ming theory of periodic train operation,the utility of periodic opening mode to improve the capacity of high-speed railway is demonstrated.According to the above research results,the present study,choosing the Beijing-Shanghai high-speed railway as the illustrative case,formulates the periodic train operation plans and draws periodic train-diagrams based upon the demand of passenger flow and line technical conditions.Through the comparison of indices,it shows that the carrying capacity of the Beijing-Shanghai high-speed railway is effectively improved,which provides the theory and reference method for the optimization of the carrying capacity of high-speed railway in China.