关键词: 结构优化, 变密度法, 工艺约束, 优化准则法, 约束因子

Abstract: Aiming at the restrictions of structural topology optimization technology in engineering application process,the manufacturing-oriented extensible constraint factor based on basic variable density method was introduced.The manufacturing process constraint and constraint factor were linked by feature matching technology,and variable density structural topology optimization method was improved oriented to application.In this method,the feature modeling technology was used to make all kinds of manufacturing process constraints to form a searchable manufacturing feature.Thus,feature matching technique was used to find manufacturing features that met the design requirements.The constraint factors and unit pseudo densities were initialized according to the preferred manufacturing features which were found out by feature matching technique.Through the control effect of con-straint factors on design variables,based on the reasonable approximation model of material properties,the struc-tural design domain was optimized by using optimization criterion method and independent mesh filtering tech-nique.The expansion model of constraint factors,the improved mathematical model with constraint factor variable density method and the solving process and application flow chart with optimization design of variable density variable with constraint factor were given,and the algorithm was implemented by Matlab program.A calculation example was given to illustrate the feasibility and effectiveness of the proposed method.

Key words: structural optimization, variable density method, processing constraint, optimality criteria method, constraint factor