Research And Application Of The Multi-building And Multi-floor Factory Facility Layout In Radiator Manufacturing Enterprise

With continuous development and application of intelligent manufacturing,the traditional manufacturing industry is facing the challenge of production transformation.The layout of plant facilities is crucial to the optimization and transformation of the manufacturing industry,and it also affects the cost and efficiency of all aspects of the enterprise.The problem of multi-floor factory facility layout planning(MFLP)has been a research hotspot in the manufacturing field.However,there is no universal solution to this problem at present due to the differences in industry categories and production modes.Focusing on the multi-building and multi-floor factory buildings of radiator manufacturing enterprises and comprehensively considering potential key factors,actual situation of the enterprise and related theories,this thesis constructs a two-stage mathematical programming model suitable for the multi-building and multi-floor factory facility layout,and designs a GA-SA hybrid solution algorithm to provide a scientific solution of this kind of problem.Firstly,combined with domestic and international multi-floor factory layout research results,the elements of factory layout and the relationships between them are clarified and a comprehensive analysis method of layout functional work units and their relationships from the aspects of functional domain,shape domain,and structural domain is proposed.Also,two-level of layout functional work units: overall functional unit(OFU)and local functional unit(LFU)are designed and the required area of related functional work units is calculated.Secondly,a two-stage MFLP solution is proposed to solve the problem of the multibuilding and multi-floor factory facility layout in radiator manufacturing enterprises.In the first stage,a multi-objective mixed integer linear programming(MILP)model(improved FAF model)used for the layout of the multi-building and multi-floor factory is constructed to mainly solve the problem of floor allocation of the overall functional units.In the second stage,a non-linear programming(NLP)model(improved FID model)used for 3D logistics path layout and considering different transportation ways is constructed to solve the problem of the layout planning of the local functional units in the floor.Thirdly,based on GA algorithm and SA algorithm,this thesis designs an improved GA-SA intelligent hybrid algorithm to solve the two-stage multi-building and multi-floor factory facility layout model.By optimizing the quality of the initial population,the crossover operation of the hybrid algorithm is improved for special layout requirements to obtain the overall optimal layout solution.Finally,taking the layout of multi-building and multi-floor factory buildings of D company as an application case,the two-stage MFLP model,GA-SA hybrid algorithm,and PSO algorithm are applied.By this way,the effectiveness and practicability of the two-stage MFLP model and GA-SA hybrid solution algorithm established in this paper are comprehensive evaluated and verified.The research in this thesis can be further applied to the layout problems of similar types of manufacturing enterprises.