Journal
THIN-WALLED STRUCTURES
Volume 72, Issue -, Pages 164-174Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.tws.2013.06.004
Keywords
Stiffened shell; Load-carrying capacity; Imperfection sensitivity; Hyperbolic generatrix shape; Surrogate-based optimization
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Funding
- National Natural Science Foundation of China [91216201, 11128205]
- National Basic Research Program (973 Program) of China [2011CB610304, 2014CB049000]
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Stiffened shells are very sensitive to initial imperfections, especially for geometrical imperfections. In this study, based on a 3-m-diameter orthogrid stiffened shell, post-buckling and imperfection sensitivity analyses are performed by use of explicit dynamic method. Result indicates that stiffened shell with outward hyperbolic generatrix shape shows a lower imperfection sensitivity as compared to the cylindrical one. Then, a framework of surrogate-based optimization including load-carrying capacity and imperfection sensitivity for stiffened shells is introduced, and the illustrative example demonstrates that the proposed framework has the potential to provide robust optimum design for realistic stiffened shells. (C) 2013 Elsevier Ltd. All rights reserved.
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