System Capacity Analysis Of Coal Loading Station Based On Queuing Theory And Simulation

Coal loading in railway station is the last part of coal production, which is also the first step in the field of coal into circulation and market.Accurate assessment and analysis of the capacity of coal loading station equipment can reduce the vacant coefficient of the equipments, improve the railway transport capacity, optimize transport organization, shorten the coal transport cycle and has great significance to the socio-economic development.The calculation methods of China Railway stations capabilities give priority to traditional formula methods and graphical calculation technique with utilization of computing as the core, lacking consideration of the station system as a whole.These methods can't determine operation delay time and the leisure coefficient easily.The thesis researches the coal loading stations, which are special freight station with the arrival of a greater imbalance, leading to a greater volatility in the actual operation of the station.These phenomenons through the traditional calculation produce greater error in the actual capacity.The thesis analyzes the the station system capacity through queuing theory and computer simulation techniques,which can overcome insufficients of the traditional method in the capacity analysis of the loading station.These two new methods are more practical.The can verify each other, complement each other, and reduce the error in determining the loading station ability.In the thesis, the concept of system capacity of coal loading station is proposed.The coal loading station system architecture is analysed in the methods of system analyse.The event streams of the various subsystems are simulated in the typical loading stations. The system capabilities of typical loading stations are computed on the whole by queuing theory, taking into account the operating system in imbalance and the resulting delay.Some quantitative measures are proposed to extend the capabilities of loading station system.The running state of the whole loading station system is simulated on the computer simulation technology based on the event stream flows of the real data and the event stream flows by changing the characters.The system capacities of typical loading stations are coputed quantitatively, and the expansion methods are propsed.In the end, influencing factors in the system capacities of the coal loading stations are summed up,and the system capacity of coal loading station in different layout types are also summarized.