Study On Calculating Methods And Investigating-determining Technologies Of Railway Station Capacity

Railway station capacity is the comprehensive representation of the whole operation of the station equipments and is the reference for scientific decision-making. For the sake of making full use of the station equipments and enhancing efficiency of transport production, it is very important to rightly investigating, calculating and determining station capacity. Along with the flying development of the society and economy and the obvious increasing of the comprehensive national strength, the level of china urbanization and living of people get a great advancement. The transport demand has a large increasing in quantity and a higher desire for transport condition, transport timing and transport accuracy in quality. The railway passenger transit expresses characteristics as centralization, high-speed and high-frequency. The railway freight trains become more and more heavier. The railway departments take many innovations to accommodate the change of transport demands such as adjusting transport strategies, extending railway network, changing management ideas, introducing advanced technology and management measures. Along with the transforms of china railway, the management and organization of railway station become more and more complex, random and imbalanced. The new circumstances break the old railway transport mode which is based on planned economy and balanced transport. The traditional railway station operation organization method and capacity calculation method could not adapt the new problems.To solve the above problems, the dissertation constructs a series of theories and methods to investigating, calculating and determining station capacity. In order to obtain the accurate station capacity, the theories take the original data as foundation, take the calculation methods as cores, take the compute as the means. The summary is as follow:The railway station capacity is discussed with the station equipments and their using process. Based on using process use and the capacity utilizing, the station fixed equipments are classify into passing equipment and staying equipment. In micro side, the equipment using process is specified as the moving equipments pass through or stay at the fixed equipments and the concepts are defined such as equipment occupying sequence, equipment occupying time sequence, equipment occupying diagram, equipment occupying trail diagram etc. In macro side, it specifies the definition of station capacity system, impact factors of station capacity, flow chart of investigating and determining station capacity, calculation methods of station capacity.In the mass, the route occupying process, technical operation process and equipment occupying process are the same process. The first process could be the contact of the behind two processes. Taking the route and its "route operation information" as the unit to collect original data, it specifies the station microcomputer interlock system as the data source. Many tables are strictly defined to collect or converse passing capacity and reorganizing capacity data such as "throat switch group and track original data table", "throat switch group occupying process table", "track occupying process table", "hump and trail original data table"Based on the analysis of equipment occupying time sequence and equipment idle time sequence, the paper puts forward to a method to calculate station equipment capacity called "diagram inserting time method". The method sets the completely utilizing of equipments as the target and can finally obtains the throat passing capacity and the track passing capacity through making sure a effective inserting time, executing the process of inserting time and adjusting the results by a linear programming model established in the paper. Comparing with the utilizing rate method, diagram inserting time method needs not to presume the equipment occupying is a linear process and set the idle-waste coefficient artificially. It is in keeping with the regulations of imbalanced normal transport and uncertain equipment occupying, so it is more practical. For reorganizing capacity, congregating capacity has been defined for shunt yard and a method called "wagon-minute utilizing rate method" is put forward to calculate the capacity.The paper analyzes the original data errors and their sources. Based on constitution analysis method, the concepts of station route general aggregation, distribution function and complexity degree are defined to analyze station operation complexity. Some indexes and the methods have been proposed to express the station receiving-departuring train imbalance such as imbalance chart, degree of dispersion and degree of imbalance. Because of the impersonal randomness of station operations, the station capacity also has its randomness. The interval notation of station capacity is more scientific than point notation. Based on the Bayesian Statistics interval estimator method, and after setting the collectivity information, priori information and sample information, the bayesian interval notation of station capacity and its calculation method have been constructed.Also software of station passing capacity calculation system is developed, which integrates some research results of the paper, can help to input data, analyze data, converse data, gains occupying process sequences of the station equipments, figures out occupying amount and occupying amount of the station equipments, finally calculates the throat passing capacity, track passing capacity and the station passing capacity.