基于参数化建模的负泊松比微结构性能分析与优化OA北大核心CSTPCD

To improve the efficiency of analyzing the effects of structural parameters on mechanical properties of cellular structure,a parametric modeling method based on secondary development of ABAQUS is proposed.In this paper,the double-headed arrow cellular structure with negative Poisson's ratio is taken as research object.Firstly,the graphical user interface(GUI)of parametric modeling is designed based on secondary development of ABAQUS,and the quasi-static compression test is carried out by using 3D printing method to verify the accuracy of finite element model established by the above parametric platform.Based on this,response surface models of peak collision force and specific energy absorption are established.The NSGA-Ⅱ multi-objective genetic optimization algorithm is utilized to optimize impact performances of the cellular structure with the objectives of minimum peak collision force and the maximum specific energy absorption and with the design variables of θ1,θ2,TL,TM,and the optimal structural topology parameters can be obtained.Through analyses on impact performances of the cellular structure after optimization,the peak collision force decreases by 14.36% and the specific energy absorption increases by 33.72% compared with those of cellular structure before optimization.