Simulation And Optimization Of In-Out Storage Of Steel Warehouse System Based On Flexsim

With the development of global economics and the great change of consumption structure in our country, steels have a large share in the productive circulating area, and the circulation efficiency directly influences efficiency and production mode of enterprises which producing and circulating steel products and downstream manufacturing enterprises. Warehousing plays an important role in accelerating cargo movement and saving circulation cost as the essential part and node of steel circulation. At present there are many problems such as low level of mechanization, unreasonable design of logistics links, low utilization of staff and equipment. Therefore, the problem how to improve the integral level of steel warehouse system in existing condition needs to be solved promptly. In this paper integral operational efficiency of warehouse system is raised up by taking the in-out storage as the key study object and improving its efficiency.The all-purpose Petri net model of steel industry is constructed with the combination of Petri net modeling technology and computer simulation technology based on basic theory and method of system project. The entire operation process of steel in-out storage is simulated so that the weak links of the system could be found and optimized.First, the characteristics, compositions, basic flows and evaluation indexes of steels warehouse system are analyzed in this paper, which lay a foundation to subsequent optimal research. And basic theories of discrete event systems are introduced. Petri net modeling method is adopted after comparing several modeling methods of discrete event systems. By using this method the Petri net models of train warehousing and automobile in-out storage of steels warehouse are constructed respectively. Then Flexsim software is introduced and simulated objectives are specified. The Flexsim simulated model of operation process of steel in-out storage is constructed by the abstraction and simplification of models. Then the effectiveness of the model is proved and the method of how to set and optimize parameters is introduced. Finally the Petri net model of steel in-out storage is constructed based on the in-out storage operation in Chengdu great southwest railway transportation limited corporation. According to the improvement strategy based on the analysis of simulated consequence, the optimal work of the warehousing system is finished after several times of simulation. The feasibility of model and the availability of optimal method are verified by analysis of the example. At the same time, the simulated consequence provides theoretical support to the decision-makings of enterprises, and it can be taken as a reference in the research of relevant fields.