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论文类型：期刊论文

发表时间：2013-11-01

发表刊物：THIN-WALLED STRUCTURES

收录刊物：SCIE、EI、Scopus

卷号：72

页面范围：164-174

ISSN号：0263-8231

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

摘要：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.