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Indexed by:期刊论文

Date of Publication:2013-11-01

Journal:THIN-WALLED STRUCTURES

Included Journals:SCIE、EI、Scopus

Volume:72

Page Number:164-174

ISSN No.:0263-8231

Key Words:Stiffened shell; Load-carrying capacity; Imperfection sensitivity; Hyperbolic generatrix shape; Surrogate-based optimization

Abstract: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.