Research On The Complexity Based On The Mixed-model Assembly And Welding Manufacturing System Balancing Problem

With the great development of modern ship-building mode,the flow line of hull panel is increasingly being used in the manufacture of medium-sized ships.In the manufacturing system,the assembly line balancing problem affects the production efficiency of assembly line,equipment utilization and production schedule of enterprise directly.Furthermore,the complexity of the manufacturing system has an important influence on the stability of the system.Taking the assembly and welding manufacturing system of hull as the research object,the paper has researched the balanced and complex problems of the assembly and welding manufacturing systems.Firstly,according the characteristics of hull assembly,the optimized model of hull mixed-model assembly line balancing problem is established.The main idea to solve the hull panel mixed-model assembly line balancing problem is that settling the assembly time for each segmented product and the priority assembly relationship of each process,the mixed-model assembly line balancing problem is turned into a single segmented assembly line balancing problem according to some theories,the optimized model of a multi-objective mixed-model assembly line balancing problem is established from both hydrostatic and dynamic equilibrium of mixed-model assembly line respectively.The genetic algorithm is used for the optimization algorithm,designing the algorithm from a different perspective based on the characteristics of the assembly line.Secondly,the associated multi-plant's complexity and the associated multi-station's complexity of the assembly and welding manufacturing systems are detailed researched from the perspective of the system.The buffering plays an important role in the hull-assembly line.First of all,the areas of buffering are established in front of the important workbay between the workshops,then according the characteristics of the assembly line,the paper analyzes the composition elements between the two kinds of complexity and the relevance of the various elements.At last,the complex model of the assembly and welding manufacturing systems are respectively established by using the method of entropy.The hierarchical multi-objective optimization method is used to solve this multi-objective problems.Thirdly,the balanced optimization software of the assembly and welding manufacturing system is developed.The software can be able to manage basic information,optimize the numeration of balanced problems and complex problems and analyze the visual results.The reliability of development software will be verified through the mixed-model assembly line of a hull panel finally.