Dynamic Simulation Of Railway Mashelling Station Operation System

The simulation of marshelling station operation system is the research for technical operation, working plan, manage measure and equipment scheduling of marshelling station. It has important function in the index calculting of equipment capability, building rationality and operation effect in marshelling station.This paper research the methods, models and realizing technic of the simulation in marshelling station base on the theory and technic of the computer simulation. In the simulation method and model area, it brougth forward a new simulation method— forward feed—circle simulation(FFCS). The new simulation method could solve the problem that the simulation result is to idealization which tradition simulation methods have faced. Base on the theory, model and arithmetic of FFCS, this thesis research ulteriorly in the area of application layer of marshelling station. It analysis the simulation model and arithmetic in the layer of lines, work equipments, work objects and operation plan. It discuss the programme and its code realizing base on the research result finally.In the area of marshelling station operation system simulation theory, this paper discuss in simulation methods and model, simulation system research structure, simulation arithmetic. Base on the simulation of complex system, this paper used the hierarchical simulation method in the simulation of marshelling station and divide the operation system into kernel simulation module and application layer module. In the kernel simulation, this paper focus on the research of theory, model and arithmetic of FFCS. In the application layer, we divide it to four sublayers: lines, work equipments, work objects and operation plan. Base on this result we research the agent model and its structor of this modules using the method of agent theory.The core idea of FFCS is using the arithmetic idea of forward feed-circle calculate(FFCC). The glancing method of FFCC is: in each simulation calcult circle, besides calcult current status, this paper also virtual push the simulation clock. In the virtual time this paper calcult the the system status base on current status, kinds of forecast/confirm information. Then we evaluate the virtual simulation result and feed back it to current time to the modify current status. This calcult circle is stopped ontil the advance setting condition is been reached. So we divide the FFCC into four step:base calcult, virtual simulation calcult, forward period of time matching and adjust calculate. Through the analysising of calcult step and calcult contents of FFCC, this paper decide to use job chain and job point idea in FFCS. Base on this research result, this paper also discuss the realize process such as data structure, model building, calcult flow, arithmetic and programme code.The application layer module of marshelling station operation system is been divided into lines simulation layer, work equipments simulation layer, work objects simulation layer and operation plan simulation layer. In lines simulation layer, this paper defined different kind of lines' data structure, builded the simulation model of kinds of lines base on agent model method, and also analysis the models structure and its realize technic. In the simulation process of the lines, this paper use the data interface to communicating with FFCS module. In work equipments simulation layer, this paper discussed the model building and simulation of shunting locomotives and train inspection teams, built the agent model and analysised there base action and arithmetic. According to the randomicity of the work time, this paper analysis the random data's generating. In work objects simulation layer, this paper analysis the model building and simulation method of train, wangons and wangon, and also research the basic information's making of train and wangon. In operation plan simulation layer., this paper analysis the dispatcher's work flow and built model of marshelling station stage plan. The marshelling station stage plan's simulation model is contented by train arrive/leave plan, lines scheduling, shunting locomotives scheduling, train formation plan and so on.In the research area of simulation software developing, this paper discuss the realizing of simulation programme, and divide the software developing into four part: simulation requirements analysis, software structure designing, software modules designing and simulating flow analysis. In simulation requirements analysis, this paper discuss the software functions and run environment. In software structure designing, this paper discuss on simulation software framework, module dividing, man-machine alternating mode and hardware composing. The designing of software modules is researching on the code realize of the simulation models base on the OOP. In the end, this paper research on the simulation flow of the software.