Aeroelastic Sizing and Layout Design of a Wingbox Through Nested Optimization

作     者：Stanford, Bret K. Jutte, Christine V. Coker, Christian A. 

作者机构：NASA Langley Res Ctr Aeroelast Branch Hampton VA 23681 USA Craig Technol Inc Adv Mat & Proc Branch Cape Canaveral FL 32920 USA Mississippi State Univ Dept Aerosp Engn Starkville MS 39759 USA 

出 版 物：《AIAA JOURNAL》 (美国航空航天学会志)

年 卷 期：2019年第57卷第2期

页      面：848-857页

核心收录：

学科分类：08[工学] 0825[工学-航空宇航科学与技术] 

主　　题：Wingbox Sensitivity Analysis Optimization Algorithm Surrogate Model Finite Element Analysis High Aspect Ratio Topology Optimization Sweep Angle Ailerons Stress Concentration 

摘      要：The goals of this work are to 1) develop an optimization algorithm that can simultaneously handle a large number of sizing variables and topological layout variables for an aeroelastic wingbox optimization problem and 2) use this algorithm to ascertain the benefits of curvilinear wingbox components. The algorithm used here is a nested optimization, in which the outer level optimizes the rib and skin stiffener layouts with a surrogate-based optimizer, and the inner level sizes all of the components via gradient-based optimization. Two optimizations are performed: one restricted to straight rib and stiffener components only, and the other allowing curved members. A moderate 1.18% structural mass reduction is obtained through the use of curvilinear members. A global sensitivity analysis of the topology variables, with and without the effect of the nested sizing variables, is also presented.