Sizing and Layout Design of an Aeroelastic Wingbox Through Nested Optimization

Stanford, Bret K ; Jutte, Christine V ; Coker, Christian A

关键词: AEROELASTICITY;    RIBS (SUPPORTS);    OPTIMIZATION;    ALGORITHMS;    GRADIENTS;    BUCKLING;    STRESSES;    STIFFENING;    REINFORCEMENT (STRUCTURES);   

RP-ID  :  NF1676L-27424

学科分类：航空航天科学

美国|英语

来源: NASA Technical Reports Server

【 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) utilize this algorithm to ascertain the benefits of curvilinear wingbox components. The algorithm used here is a nested optimization, where 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, the other allowing curved members. A moderate 1.18% structural mass reduction is obtained through the use of curvilinear members.