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论文类型：期刊论文

发表时间：2014-09-01

发表刊物：THIN-WALLED STRUCTURES

收录刊物：SCIE、EI

卷号：82

页面范围：46-54

ISSN号：0263-8231

关键字：Hierarchical stiffened shell; Axial compression; Buckling; Imperfection sensitivity; Hybrid optimization

摘要：In this study, Smeared Stiffener Method (SSM) of hierarchical stiffened shells is derived to release the prediction burden of buckling loads. Then, a minimum-weight optimization formulation for hierarchical stiffened shells is developed based on SSM, attempting to demonstrate the higher lightweight potential of hierarchical stiffened shells compared to the traditional ones. Further, the main aim of this paper is to present a hybrid optimization framework of hierarchical stiffened shells including imperfection sensitivity, combining the efficiency of SSM with the accuracy of FEM, since there are currently no closed-form solutions to take imperfections into account accurately. The illustrative example demonstrates that the proposed framework has a higher optimization efficiency and global optimization capability compared to the conventional methods. (C) 2014 Elsevier Ltd. All rights reserved.