Research On High Speed Rail Express Transportation Organization Coordination

Scientifically and effectively formulating the transportation plan of high-speed rail express is one of the core tasks of the daily transportation organization of high-speed rail express.In view of the rapid growth of high-speed rail express demand,from the perspective of improving the income of high-speed rail express enterprises,this paper puts forward the coordinated transportation mode of passenger train carrying and high-speed rail express train,in order to efficiently meet the freight demand and promote the development of high-speed rail express.This paper focuses on the cooperative transportation organization of high-speed rail express.Firstly,on the basis of summarizing the research on the optimization of transportation organization mode and the coupling of passenger and freight lines at home and abroad,the research content and framework of this paper are put forward.Secondly,it analyzes the highspeed rail express product system and transportation organization mode,and reviews the theories and methods of transportation mode collaborative optimization and passenger freight coupling mechanism optimization,so as to lay a theoretical foundation for follow-up research.Thirdly,considering the relevant influencing factors such as product types,freight transportation organization mode and train loading capacity,a high-speed rail express transportation mode cooperation model with the goal of maximizing the income of high-speed rail express enterprises and the limited conditions of arrival time,loading and unloading time and train capacity is established,and the solution algorithm is designed.Fourth,analyze the impact of special high-speed rail trains on passenger trains,aiming at minimizing the insufficient supply of high-speed rail and the minimum adjustment time of the existing timetable,establish a double-objective optimization model,and design a Lagrange relaxation algorithm to solve the model.Finally,build a high-speed rail express network and select the Beijing Shanghai line of high-speed rail as a typical line for empirical research;The gravity model is used to predict the transportation volume between nodes to verify the effectiveness of the high-speed rail express transportation mode coordination model and the high-speed rail passenger freight coupling mechanism optimization model.The empirical results show that based on the solution results of the collaborative model of high-speed rail express transportation mode,the demand for three kinds of high-speed rail express products in 28 OD pairs between 8 starting and ending points of Beijing Shanghai line is 186.54 tons / day,which is completed in the collaborative allocation of 25 high-speed rail passenger pick-up cars and 3 high-speed rail express trains.The products of the same day are transported by the passenger train;Products arriving in the next morning are transported by express train;In the total amount,89.5% of the next day products are transported by three special express trains,and 10.5% of the next day products are transported by passenger trains.The total profit of collaborative transportation mode is 1.427 million yuan / day.Based on the solution results of the optimization model of passenger freight coupling mechanism under the mixed passenger and freight line,the three special trains of high-speed rail have an impact on the timetable of 4.42% of high-speed rail passenger trains on the Beijing Shanghai line of highspeed rail.There are 23 figures,21 tables and 44 references.