Stiffeners layout design of thin-walled structures with constraints on multi-fastener joint loads  

作　　者：Jie HOU Jihong ZHU Fei HE Weihong ZHANG Wenjie GUO 

机构地区：[1]Engineering Simulation & Aerospace Computing, The Key Laboratory of Contemporary Design and Integrated Manufacturing Technology, Northwestern Polytechnieal University, Xi'an 710072, China

出　　处：《Chinese Journal of Aeronautics》2017年第4期1441-1450,共10页中国航空学报（英文版）

基　　金：supported by National Natural Science Foundation of China (Nos. 11432011, 11620101002);National key research and development program of China (No. 2017YFB1102800);Key Research and Development Program of Shaanxi, China (No. S2017-ZDYF-ZDXM-GY-0035)

摘　　要：The purpose of this paper is to present an extended topology optimization method for the stiffeners layout design of aircraft assembled structures. Multi-fastener joint loads and manufacturing constraints are considered simultaneously. On one hand, the joint loads are calculated and constrained within a limited value to avoid the failure of fasteners. On the other hand, the manufacturing constraints of the material distribution in the machining directions of stiffeners are implemented by an improved piecewise interpolation based on a beveled cut-surface. It is proven that the objective function is strictly continuous and differentiable with respect to the piecewise interpolation. The effects of the extended method with two different constraints are highlighted by typical numerical examples. Compared with the standard topology optimization, the final designs have clearly shown the layout of stiffeners and the joint loads have been perfectly constrained to a satisfying level.The purpose of this paper is to present an extended topology optimization method for the stiffeners layout design of aircraft assembled structures. Multi-fastener joint loads and manufacturing constraints are considered simultaneously. On one hand, the joint loads are calculated and constrained within a limited value to avoid the failure of fasteners. On the other hand, the manufacturing constraints of the material distribution in the machining directions of stiffeners are implemented by an improved piecewise interpolation based on a beveled cut-surface. It is proven that the objective function is strictly continuous and differentiable with respect to the piecewise interpolation. The effects of the extended method with two different constraints are highlighted by typical numerical examples. Compared with the standard topology optimization, the final designs have clearly shown the layout of stiffeners and the joint loads have been perfectly constrained to a satisfying level.

关 键 词：Joint load constraint Manufacturing constraint Stiffeners Thin-walled structures Topology optimization 

分 类 号：V214.4[航空宇航科学与技术—航空宇航推进理论与工程]