Impact Factors Of Coal Port Throughput Capacity Based On Complex System Analysis

Coal terminal logistics system is a complex dynamic system, there are manyuncertain factors affecting the system’s performance. The influence mechanism is notonly an engineering problem, but also an academic problem. Under the guidance ofthe complex system science, the paper makes comprehensively analysis on thecomplexity of the output coal terminal logistics system; Establishes the steady-statemathematical model of coal terminal logistics system based on the queuing networktheory; analyzes the related influencing factors and its influence mechanism on thesteady state; With system simulation technology, the paper builds the simulationmodel of complex factors and coal terminal through capacity; Quantitatively studiesthe relationship between the production of terminal performance and complex factors.The paper achieves remarkable results:(1) With the modern scientific theory of complex systems, the concept of staticand dynamic complexity of coal terminal logistics system is proposed. The paperalso analyzes terminal logistics system’s complexity factor; In-depth study on thecalculation of terminal’s theory through capacity, the paper summarizes the keyfactors that influence terminal logistic system’s performance.(2) Based on queuing network theory, it reveals the output type coal terminallogistics system has characteristics of Jackson and Fork-Join queuing networks,establishes the steady-state model of terminal logistics system. It finds that the ship ortrain queue length and waiting time are the most sensitive to the variation of relevantfactors.(3)The paper makes object-oriented analysis on coal terminal logistics systemwith object-oriented modeling idea and determines the system’s object classes;Combine with a large terminal’s actual operating conditions, it’s the first time toestablish the complex factors oriented system simulation model on the Simio platformwith the aid of system simulation technology. By comparing with the actual data, itproves the feasibility and applicability of the model.(4) For the simulation model, the paper designs experiments aimed at the complex factors such as the train’s (the ship’s)arrival interval, stockpiling strategy,the number of devices and the device’s rated power. It makes sensitive analysis aboutthe simulation data and quantitatively studies the relationship between the complexfactors and terminal’s production efficiency; It firstly draws up causal graph of therelevant factors and terminal capacity; Also it reveals the dynamic mechanism ofcomplex factors.Results of this study are direct to the engineering practice and they areconducive to mine system’s bottlenecks. What’s more, it provides theoretical basisand decision support for the planning and design as well as terminal’s operations andmanagement, it has a certain academic and engineering value.