Research On Dynamic Train Operation Plan For High-speed Railway Express

The express transportation market grows steadily every year,and the demand from transportation enterprises will be strong.However,due to the low delivery speed of railway cargo transportation,the timeliness requirements of transported products cannot be guaranteed,and its market share is at a low level.At present,China has built large-scale and networked high-speed railway lines,which provides the possibility to develop High-speed railway express by utilizing the surplus capacity of high-speed railway lines.However,China’s highspeed railway express is in the development and exploration stage,most of the related researches focus on confirmation train and piggyback train.The high-speed rail express train operation plan is the key link of the high-speed railway express transportation plan,which realizes Realize the transportation organization scheme from cargo flow to train flow to avoid the situation of line flow mismatch.In traditional railway freight transportation,freight train marshalling plan is prepared based on statistical and forecast freight demand,and trains are arranged according to freight train operation diagram and daily actual demand,which cannot reflect the dynamic changes of market freight demand.Therefore,aiming at the characteristics of high volatility of freight transportation demand in the high-speed rail express market,this paper realizes a dynamic,timely and precise organization of high-speed railway express freight transportation.According to the changing needs of the freight market,this paper studies the technology of high-speed rail express dynamic train operation plan.This paper mainly studies the method of the high-speed rail express dynamic train operation plan,the content is as follows:(1)Research on the transport organization model of high-speed railway express and the basic principle of high-speed railway express.This paper proposes the dynamic planning highspeed railway express freight transportation organization model and studies the train transpor organization mode of high-speed railway express combined with the characteristics of the freight demand.On this basis,the basic principles of the train operation plan of high-speed railway express are studied,and the idea and process of the planning of dynamic trains for high-speed railway express goods are proposed.(2)Establishment of a dynamic train operation plan model for high-speed railway express.Based on the characteristics of high-speed railway express market demand,combined with the idea and process of high-speed railway express dynamic train operation plan,a model for high-speed railway express train operation plan based on dynamic space-time network is established.(3)Design a two-stage heuristic solution method based on Dijkstra algorithm and genetic algorithm.A numerical example is set up,and the optimal train operation plan is obtained,which verifies the feasibility of the model and the algorithm.At the same time,the obtained results can also prove the necessity of the existence of confirmation train and piggyback train in a small range.