Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5472842 | Aerospace Science and Technology | 2017 | 19 Pages |
Abstract
Influenced by numerous local features, the post-buckling analysis and optimization for hierarchical stiffened shells suffer from heavy computational costs. By smearing the minor stiffeners based on a novel numerical implementation of asymptotic homogenization (NIAH) method, a novel hybrid model for hierarchical stiffened shells is presented. Then, the high prediction accuracy and efficiency of the hybrid model for post-buckling analysis and imperfection sensitivity analysis are validated. Furthermore, a grid-pattern optimization framework of novel hierarchical stiffened shells allowing for imperfection sensitivity is established. The illustrative examples indicate that, the hierarchical stiffened shell with candidate sub-structures is more competitive in load-carrying capacity than that with the fixed grid-pattern, and the presence of imperfections would greatly affect the results of grid-pattern optimizations.
Related Topics
Physical Sciences and Engineering
Engineering
Aerospace Engineering
Authors
Bo Wang, Kuo Tian, Caihua Zhou, Peng Hao, Yanbing Zheng, Yunlong Ma, Jiebing Wang,