Research On The Preparing Theory And Method Of Freight Train Diagram Based On Daily Chart

In recent years,the market share of railway freight transportation has been decreasing year by year.One of the important reasons is that the railway has a large problem in the transport organization level.The train diagram is used as the core technical document of the railway transport organization,it is essential to daily transport organization of the railway,while the existing train diagram using static model to work out leads to low planned exchange rate,it is unable to adapt to the dynamic changes of daily transportation demand,therefore the preparing of the train diagram is in urgent need of improvement.This paper analyzed the shortcomings of the existing freight train diagram,and introduced the idea of daily chart,which aims to make the operation diagram fastly cope with the dynamic market demand of freight transportation.By the discussion of the preparing theory of freight train diagram based on daily chart,the paper made the target of freight train diagram based on daily chart clear,put forward the strategic idea by two steps from the basic diagram to the daily implementation diagram to realize daily chart for the railway,analyzed the organization,principle and operation mechanism of freight train diagram based on daily chart,summarized the preparing process of the basic diagram and the daily implementation diagram,and analyzed the feasibility for freight train diagram based on daily chart about the information technology security level.On the basis of the preliminary construction of the theory for freight train diagram based on daily chart,this paper put forward the method of preparing freight train diagram based on daily chart.The basic diagram follows the basic existing preparing method of train diagram,the daily implementation diagram which is mainly aimed to the dynamic market demand of freight transportation,according to the dynamic wagon flow conditions to prepare freight train operation plan based on freight train marshalling plan,in accordance with the content stipulated in the operation plan,to select the corresponding freight train running lines on the basic diagram to work out the daily implementation diagram.In essence,the daily implementation diagram which is prepared on the basis of the real-time dynamic demand of freight transportation select the freight train running lines on the basic diagram to prepare,the selection of the running lines directly affects the quality of the daily implementation diagram.This paper studied the problem of optimal selection of running lines of the train for the direct cargo train in the end,and built the network graph model and the mathematical optimization model respectively,the mathematical optimization model is more convenient to describe the nature of the problem,so it can be extended easily combined with the facts to solve the problems more general.In general,this paper studied freight train diagram based on daily chart,hoping to provide reference for the improvement of the railway transport organization.