Optimization Study On The Freight Organization Of Railway Branch Line Base On Petri Nets

Recently,the rapid development of China's railway passenger transport goes fast.But Railway freight transport development is lagging behind.A branch railway is a bridge to connect local businesses and large capacity transport;its development lagged behind apparently.The overall performance of the current branch railway is rather poor,e.g.,situations like management unscientific,outdated equipment,poor organizational efficiency of freight and so on,which causes that branch freight demand could not be met and the income is reduced.Currently,how to improve Branch Freight organization in a scientific and effective way is an urgent problem.Based on the above situation,this paper focuses on the branch freight organization status quo,and uses Petri Nets,qualitative and quantitative analysis method to analyze,optimize and evaluate three sides of branch freight transportation which includes branch command and control,conditioner use and freight organizations,and then find a feasible and efficient Branch optimization.Based on the existing research,this paper firstly discusses the basic concept of Petri Nets.The Shuida branch of Chengdu Railway Bureau is chosen as an example to introduce the current profile of the branch lines.Then the current situation of branch lines is analyzed in detail from branch dispatch control system,conditioner use and freight organizations.And drafted the fish bone analysis chart for Shuida feeder railways' efficiency of the transport organization influencing factors,which would make us define study object.Secondly,through the study of dispatch command system,shunting locomotive operating processes and freight business processes,we built the operating flow chart and Petri network model of about these three aspects.Against series type models of them,we analyze these models with qualitative analysis method.For those non-series type models,we first find conflict and synchronization relationship,then we analyze them with qualitative and quantitative analysis method based on the results and putted forward the recycled optimization suggestions and measures about the three subsystems.At last,this paper proposes a branch freight organization process optimization evaluation system,and use Exspect simulation tools to simulate and compare the actual operation and management of a branch situation from branch dispatch control system,conditioner use and freight organizations.The results show the feasibility and efficiency of the effect of process optimization...