Study On Simulation And Evaluation Method Of Coal Wharf Logistics Capability Based On Witness

With the development of modern logistics concept,as the key node of supply chain coal ports not only face the fierce competition among ports,but also take a part in the competition among supply chains of coal transportation industry.Especially under global environment of fuel shortage,coal wharf is an important resource the supply of which lags behind the demand,therefore,the coal wharf is always the bottle-neck of coal transportation.How to construct modern logistics system rapidly, improve logistics ability,decrease the cost and create more added-value become important in competition of the supply chain and one of the urgent problems of social production.Therefore,proposing a systematic method for evaluation of coal wharf logistics capability is benefit to find the bottle-neck of logistics capability of the coal wharf,it also helps to improve the coal wharf logistics capability and encourage the rapid growth of coal logistics industry.Coal wharf logistics system is a very complex system(Coal wharf system includes car unloading system with car dumper,coal storage yard operation,coal conveyer belt system,coal blending system,shipment system and so on,all of them consume much time and resource),the formation of its capability has many aspects of restrictive factors,which should be analyzed in systematic and integral view.Based on a systematic and integral view,with the simulation software of WITNESS the dissertation made a thorough study on the concept and the influencing factors of coal port logistics capability and established a simulation plate-form for evaluation of coal wharf logistics capability.This dissertation extended the research area of simulation and evaluation of coal wharf logistics capability,it mainly includes the follows:Firstly,the dissertation systematically described the theory foundation and basic simulation theory of coal wharf logistics system,defined the coal wharf logistics capability,it also analyzed the composition and evaluation index of logistics capability.Coal wharf logistics capability is defined as the comprehensive processing capabilities of logistics hardware resources under the production plan and scheduling management,it can also be considered to be the comprehensive capability of the visible factors of coal wharf logistics system including ships,trains,belt, shipping-machine,car-dumps,etc which is influenced by the invisible elements including ship scheduling,train scheduling,yard stacking strategies,service strategies, handling-device-state information,production scheduling strategy,personal management,etc.Secondly,combined the characteristics of coal wharf logistics system,the dissertation put forward the application method and steps of the simulation and evaluation of logistics capability of coal wharf system.It described the basic thinking and method of building simulation model including the modeling method of conceptual model(conceptual model includes the hierarchical model,object model, dynamic model),and basic thinking of building the simulation model of coal wharf logistics system with the new software of Witness.Lastly,this dissertation took the 4th coal wharf of Qin Huang Dao port for application example to apply the method of the simulation and evaluation of logistics capability of coal wharf system which has been put forward in the dissertation. Through the simulation and evaluation of coal wharf logistics capability,it has found out the bottle-neck restricting coal wharf logistics capability and provides reference for the development of the modern coal port logistics industry.This research work concerned in this dissertation will benefit the design and management of coal wharf.