Modeling And Simulation Of The Distribution Center Of Logistics Based On AutoMod

Distribution center is an important part of logistics. Based on the function, the result of the analysis, the task flow and the equipment of distribution center that had been built, it was optimized in the past. This method doesn't only waste many equipments and funds, but also need to consume a great deal of manpower and time. In order to save cost and time of the process and assure science of programming and decision, the author puts forward the research topic of "Modeling and Simulation of the Distribution Center of Logistics Based on AutoMod".In this paper it elaborates the domestic and international research actuality of the logistics and the distribution center. And the modeling of the distribution center is built using Petri-net that is based on the characteristic of it. The author discusses the foundation theories of the Petri-net and work-flow. Based on the constitute and the task flow, the distribution center is divided into some subsystems such as stocking, storage, picking, distribution, computer and handling system, etc. According to the result of the analysis, the characteristic and the equipments of it, the layering building model method is put forward .And the subsystem models of the stock, the storage ,the picking, the distribution, the computer and the transport were built. The author tallied up the change affair-forms of each subsystem, and analyzed the commonly model of the system using the workflow predigestion of Petri-net and the reachable tree.In order to validate the feasibility and practicability of the commonly model,the author builds the practicality model of Nanjing distribution center of logistics using the layering building model method that is based on the layout of it. And the computer simulation of picking system of Nanjing distribution center is done by dint of AutoMod software. According to the result of three dimensions simulation, the "bottle-neck" phenomenon is discovered. Many measures that can eliminate this phenomenon is brought forward, and provides the improved plan and the decision support for the terminal.