Research On Operation Organization Optimization Of Beijing-Shanghai High-speed Railway

As an important strategic transportation project in China,Beijing-Shanghai highspeed railway has a great influence on the social and economic development along the line and the national road network.Due to the connection with a number of high-speed rail lines,the contradiction between cross-line trains and local trains has become more prominent.Therefore,the research on the optimization of the operation organization of Beijing-Shanghai high-speed railway can realize the reasonable number of cross-line trains and local trains,and the train operation line is more coordinated.It is of great significance for the operation of Beijing-Shanghai high-speed railway and other dedicated passenger lines to effectively improve the utilization rate of the overall line passing capacity and the utilization efficiency of EMU.Firstly,this paper summarizes the domestic and foreign scholars’ research on the train operation plan and train operation diagram.On this basis,it analyzes the connotation and influencing factors of the train operation plan,the characteristics and main problems of the train operation diagram of high-speed railway.Then,the paper analyzes the current situation of the train operation organization of the Beijing-Shanghai high-speed railway in detail,and expounds the main existing problems of the cross-line train operation plan and the coordination and optimization of the train operation line.Aiming at the optimization of cross-line train operation scheme,starting with the economic benefit of the train operation,the quantitative analysis is made on the trains of local line and cross-line in the whole journey,and two strategies of changing the starting and finishing points and detour are discussed when the cross-line trains are cancelled.The decision model of cross-line train operation is established based on the constraints of section,station passing capacity and station service frequency.According to the characteristics of the model,an improved branch and bound method was designed based on pseudo-cost branching and deep optimization search strategy.For this line across the line of train paths coordination optimization problem,in the optimized on the basis of the cross line of train plan,in order to train always turn back in time and place the target of minimizing the total travel time,combined with the line station capacity and interval time constraints this line cross line train paths coordination optimization model is established,and using simulated annealing algorithm to solve.Finally,on the basis of the coordination and optimization of the train running scheme and running line mentioned above,the optimized train running diagram is compiled through the train running diagram compilation system.The validity and feasibility of the model are verified to provide reference for the operation of Beijing-Shanghai high-speed railway and other dedicated passenger lines.