Research On The Organization Optimization Of The Operation Scheme Of Heavy-duty Freight Trains Based On Direct Loading

Rail transportation,which operates strictly according to plan,is the main mode of transportation for delivering bulk commodities and undertaking mainline transportation tasks.Therefore,railway transportation has been widely concerned for a long time.my country’s vast territory and other characteristics make railway transportation organization an important mode of transportation of bulk goods that is indispensable for modernization.Railway transportation accounts for about 70% of all goods turnover in my country every year.With the acceleration of my country’s modernization process and the rapid development of science and technology,the modern management process of my country’s railway transportation also needs to be accelerated.Therefore,how to optimize the railway organization has always been a hot topic discussed by many domestic and foreign scholars.The organization and optimization of direct trains with heavy-duty passages to the loading point is a very important part of the railway freight transportation operation system,which can greatly improve the running efficiency.Reasonable design of the train running plan at the loading site can reduce the pressure of marshalling operations and operate efficiently at adjacent marshalling stations and technical stations.Firstly,the paper introduces the research background and significance of the coordination and optimization of traffic flow organization and optimization of railway hubs and the running of ordinary loading-place direct trains and loading-place direct heavy-duty freight trains,as well as the main research contents and research technical routes of this paper.This paper reviews the domestic and foreign literatures on three aspects: direct trains at the loading point,heavy-duty freight trains,and train marshalling optimization based on parameter uncertainty.Summarized the research status,research methods and research results at home and abroad.Secondly,it mainly analyzes the transportation organization and running conditions of ordinary trains directly from the loading point and heavy-duty trains directly from the loading point,the calculation of relevant costs in different transportation processes,and the impact of traffic flow fluctuations on organized train transportation.The specific classification of the operation organization mode of the ordinary trains directly from the loading point and the heavy-duty trains directly from the loading point is introduced in detail.Aiming at the uncertain traffic flow,a research model for the optimization of the organization of heavy-duty direct trains at the loading point based on the fluctuation of the traffic flow is established.Aiming at the influence of the two key sub-problems of traffic flow and train path selection on the overall optimization,a random model of traffic flow parameters is established.Due to the complexity of the problem model,the nonlinear model was transformed into a 0-1 integer linear programming,and an improved genetic algorithm was designed using a heuristic solution strategy.Finally,it summarizes and puts forward the research prospects for the organization scheme of direct heavy-haul trains with fluctuating traffic flow.This paper summarizes the main contents of the research problem,model establishment and solution,and algorithm design.Synthesize articles and the actual situation of the research,put forward the shortcomings in the article research,and make an outlook.