Geometry and size optimization of stiffener layout for three-dimensional box structures with maximization of natural frequencies

作     者：Tiannan HU Xiaohong DING Heng ZHANG Lei SHEN Hao LI Tiannan HU;Xiaohong DING;Heng ZHANG;Lei SHEN;Hao Li

作者机构：School of Mechanical EngineeringUniversity of Shanghai for Science and TechnologyShanghai 200093China Department of Mechanical Engineering and ScienceKyoto UniversityKyoto 615-8540Japan 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2023年第36卷第1期

页      面：324-341页

核心收录：

学科分类：08[工学] 0825[工学-航空宇航科学与技术] 

基　　金：supported by National Natural Science Foundation of China(Nos.51975380,52005377) China Postdoctoral Science Foundation(No.2020M681346) Japan Society for the Promotion of Science(No.JP21J13418) 

主　　题：Box structure Geometry optimization Improved adaptive growth method Maximum natural frequency design Stiffener layout 

摘      要：Based on the growth mechanism of natural biological branching systems and inspiration from the morphology of plant root tips,a bionic design method called Improved Adaptive Growth Method(IAGM)has been proposed in the authors’previous research and successfully applied to the reinforcement optimization of three-dimensional box structures with respect to natural ***,as a kind of ground structure methods,the final layout patterns of stiffeners obtained by using the IAGM are highly subjected to their ground structures,which restricts the optimization effect and freedom to further improve the dynamic performance of *** solve this problem,a novel post-processing geometry and size optimization approach is proposed in this *** method takes the former layout optimization result as start,and iteratively finds the optimal layout angles,locations,and lengths of stiffeners with a few design variables by optimizing the positions of some specific node lines called active node *** the same time,thick-nesses of stiffeners are also optimized to further improve natural frequencies of three-dimensional box *** this method,stiffeners can be successfully separated from their ground structures and further effectively improve natural frequencies of three-dimensional box structures with less material *** numerical examples are illustrated to validate the effectiveness and advantages of the suggested method.