Study Of Optimizing Scheme For Capacity Expansion Of Existing Marshalling Stations In Regional Areas

Railway marshalling station,which is one important part as well as a basic producing unit of the railway system,specialise in the work of disintegration and marshalling of trains. The rational layout of the railway marshalling yard includes a newly built and existing marshalling yard marshalling yard of the Capacity Expansion of double significance.With the overall development of China's railways,the construction of passenger lines,high-speed railways has already been carried on.The operation of these new lines is bringing changes of the organization method of railway transportation and choice of transportation path.The increasing of the railway line and the expansion of the road network scale in our nation can not solve the conflict between supply and demand in railway transport completely, the problom of shortage of some marshalling capacity emerges frequently, under the background of the development of the railway transport towards concentration, heavy based, container transport, direct and fast,the number of marshalling yard began to decline gradually, the phenomenon that several marshalling yards exist in the same region can not adjust to the trend of development currently. under this situation, the sdudy should be started from the research on a number of existed marshalling yards, thus reducing the construction investment mostly.Therefore,the reconstruction of selected marshalling stations could ensure the safety and smooth of the railway network and improve the efficiency and development of railway transportation production, what's more,this could make great significance in accelerating rolling stock turnover, shortening the delivery time of goods, and improving economic and social benefits, and promote the sustainable development of railway transportion.At present,studies on marshalling stations mostly concentrate on overall railway network layout planning,and rarely on the location research of the stations in a reginal scope. this thesis puts great emphasis on how to choose the appropriate locality marshalling stations to strengthen their capacity under ecnomic growing environment in regional areas.In the environment for economic growth in the area,this paper concentrates on how to choose the appropriate existing local marshalling and to make them into regional marshalling station. at the same time, this paper mains in theoretical research,supplemented by some examples. At the current stage, research of the marshalling station in our country mostly concentrates on the layout planning of the total road network rather than the study on location which solves problems about the positioning of various functions in any area.what's more,less research have been carried on which is about the location of a marshalling station based on the use of modern optimization methods.Therefore,in the course of the study,this article referees both the existing research results and the theory of location problem in the fields of logistics,applies qualitative analysis and quantitative financial calculations,and establishes Marshalling Location Method model,using systems science,optimization theory and other related subjects research methods.The content of this study include the following aspects:.(1) this paper describes the development process of the railway marshalling yard, analyzes the function and role of marshalling yard and describes of the layout of the marshalling yard.what's more,it summed up the characteristics of regional marshalling yard, selecting conditions, factors on the layout of regional Marshalling, and the interaction between regional economic development and reconstruction of marshalling expansion.this paper describes the development process of the railway marshalling yard, analyzes the function and role of marshalling yard and describes of the layout of the marshalling yard. what's more,it summed up the characteristics of regional marshalling yard, selecting conditions, factors on the layout of regional Marshalling, and the interaction between regional economic development and reconstruction of marshalling expansion.(2) through the introduction of the system structure of marshalling station,this paper summarizes the parameters which impacts the capacity of the marshalling station and indicators which determines the size of marshalling yard,and analyzes the various costs incurred in the organization of the traffic flow and the methods solving these costs.(3) This paper summarizes the correlation algorithm of location problem in and out of our country, established an mixed integer programming mode according to the characteristics of the regional marshalling yard,and design combination of genetic algorithm for the model.(4) Combined Genetic Algorithms was designed to solve model. an example has been used to prove the effectiveness of the method.