Design And Optimization Of Freight Operation Flow Of High Speed Railway

China’s planned "eight horizontal and eight vertical" high-speed railway network provides the basis for the development of high-speed rail freight transport in China.The use of high-speed rail for freight transport can play the advantages of high-speed rail to meet the growing demand for freight transport,with positive social and economic benefits.Under the above background,this paper designs the freight operation process of high-speed railway,including the subsequent optimization in the design process.Therefore,in the process design,Petri net is used for the subsequent optimization,and the final flow chart is drawn,which is carried out from the following aspects:(1)This paper introduces the characteristics,product types and SWOT analysis of high-speed railway freight trains,and comprehensively analyzes the technical and economic feasibility of high-speed railway freight operation combined with the characteristics of railway and air freight.(2)According to the operation flow of railway and air freight,combined with the characteristics of high-speed railway freight trains,the operation flow of high-speed railway freight is designed,the operation flow chart is drawn,the flow chart of each link of sending operation and arriving operation is described,and the flow chart of each link is drawn.(3)High speed railway freight operation process modeling.Through the process modeling of Petri net,this paper analyzes the operation process of high-speed rail freight transportation.Aiming at the above-mentioned operation process,the Petri net models of sending and arriving operations are constructed respectively to verify the rationality.(4)Optimization and analysis of freight operation flow of high-speed railway.Firstly,the principles and objectives of process optimization are determined.Secondly,the Petri net association matrix is recombined and analyzed.According to the algorithm,each subnet of departure and arrival operations is found.Then,the conflict table and synchronization table between subnets are established according to the correlation matrix.According to the synchronization and conflict links in the corresponding process,a reasonable optimization scheme is proposed.Finally,the optimized operation flow chart is drawn.The development of high-speed rail freight has a broad prospect,which is bound to become one of the important ways of freight transportation in the future.Therefore,it is necessary to design a set of operation process suitable for high-speed rail freight,which can provide a plan for the development of national high-speed rail freight.