Research On The Method Of Carrying Capacity Optimization On Beijing-Shanghai High-Speed Railway

With the rapid development of China's high-speed railway in recent years,the high-speed railway gradually becomes the network operation,and the capacity of main channels and hubs is tense.Beijing-Shanghai High-speed Railway,as the backbone of China's high-speed railway network,plays an extremely important role in the operation of the network.With the increasing passenger flow,its carrying capacity gradually fails to meet the passenger travel demand,and becomes the bottleneck of the networked train operation capacity,which severely restricts the utilization of the efficiency of the whole high-speed railway network in China.Therefore,the research on the carrying capacity of Beijing-Shanghai high-speed railway is conducive to improving the train operation efficiency and benefit of the railway network,improving the service level of the network,giving full play to the leading role of the railway,and further meeting the major needs of the national strategy and socio-economic development capacity.Based on the operation characteristics of Beijing-Shanghai high-speed railway and the current operation organization mode of Beijing-Shanghai high-speed railway,this paper studies the optimization method of the utilization of the capacity of Beijing-Shanghai highspeed railway from the train operation plan and transportation organization by analyzing the interaction mechanism of the factors of the railway capacity.The specific research work is as follows:(1)Summarizing the theoretical basis of high-speed railway throughput capacity,including the classification of high-speed railway throughput capacity,the influencing factors and the main calculation methods,and emphatically analyses the calculation method of throughput capacity of operation charts based on deduction coefficient,and studies the deduction method caused by the stop of high-grade trains and the deduction method caused by the speed difference of trains of different speed.(2)Introducing the actual operation situation of Beijing-Shanghai high-speed railway line.Based on the existing facilities,equipment and operation organization method,the calculation method of the high-speed railway carrying capacity based on deduction coefficient is adopted to calculate the carrying capacity of the whole line of Beijing-Shanghai high-speed railway under the existing operation chart.(3)Introducing the characteristics and applicable conditions of the standardized operation chart,and according to the calculation idea of the Beijing-Shanghai standardized operation chart,analyses the deduction of the passing capacity of three different types of trains,and calculates the Beijing-Shanghai standardized operation chart.(4)Studying the shortcomings of the capacity utilization of Beijing-Shanghai high-speed railway,constructs an optimization model for the capacity utilization of high-speed railway with the objective of minimizing train deduction logarithm,and designs a simulated annealing algorithm to solve the problem in view of the characteristics of non-linear integer programming and more constraints in the model.(5)Putting forward The measures for optimizing the capacity utilization of BeijingShanghai high-speed railway.The optimization methods for the capacity utilization of existing train charts include adjusting the operation ratio of trains with different speed classes,adjusting the number of trains with higher speed classes and optimizing the stopping schemes of trains.The optimization of the capacity utilization of standardized train charts includes unifying the running speed of trains and choosing suitable crossing locations,and calculating the optimization degree of capacity utilization under various methods respectively.