Parametric Modeling And Optimization Analysis Of Space Tube Truss Structures

Parametric generative design is an intelligent design tool generated after the development of a computer design system to a certain period of time.It not only changes the working methods of architects,but also changes the collaborative work mode between architects and structural designers.,Due to the characteristics of large span and light weight,the spatial steel pipe truss model is the preferred goal of the collaborative working mode of the building and structure in the research parametric platform in the design field.The thesis conducts in-depth research on the parametric design and optimization methods of the space steel pipe truss model.The main contents include:1.The general method and process of parametric generative design and the application of parametric modeling related to domestic and foreign research status were sorted out,and based on this as a starting point,the current parametric modeling research and application deficiencies were summarized,as well as structural optimization Analyze the current state of research.2.Analyzed the difficulties in establishing the three-dimensional model of the space steel pipe truss structure.Taking the Grasshopper parametric modeling software under the Rhino platform as an example,a variable parametric generative design method was proposed.The basic process of parametric modeling and the parametric modeling method of spatial steel truss members are described in detail.3.Based on the above-mentioned parametric modeling principles and the results obtained from the analysis,this paper uses genetic algorithm to optimize the analysis of the space steel pipe truss structure.The objective function is the engineering cost,and the allowable value and structural requirements stipulated by the relevant specifications and standards are used as the limit constraints.At the same time,a penalty function is added to transform the constrained state of the structure into an unconstrained state,so that the overall situation can be obtained.The optimal solution in.Secondly,use Matlab tools to write genetic algorithm files and Abaqus finite element command stream files to realize the connection between Abaqus finite element analysis and calculation software and genetic algorithms,and to generate and optimize geometric models while numerical modeling and analysis.Thus,the whole process from modeling parameterization to optimization analysis and calculation of the space steel pipe truss structure is completed.Finally,for an actual project,the author’s method is verified,which can solve the parametric modeling and optimization problems of large and complex space steel pipe structures.It not only greatly reduces the cost,but also improves the work efficiency,which proves that this type of parameter optimization analysis Applicability and reliability of the design method.