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Grid-pattern optimization framework of novel hierarchical stiffened shells allowing for imperfection sensitivity.
- Source :
-
Aerospace Science & Technology . Mar2017, Vol. 62, p114-121. 8p. - Publication Year :
- 2017
-
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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 12709638
- Volume :
- 62
- Database :
- Academic Search Index
- Journal :
- Aerospace Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 120889686
- Full Text :
- https://doi.org/10.1016/j.ast.2016.12.002