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Structural and Multidisciplinary Optimization

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01-08-2014 | INDUSTRIAL APPLICATION

Two-stage size-layout optimization of axially compressed stiffened panels

Authors: Bo Wang, Peng Hao, Gang Li, Kuo Tian, Kaifan Du, Xiaojun Wang, Xi Zhang, Xiaohan Tang

Published in: Structural and Multidisciplinary Optimization | Issue 2/2014

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Abstract

In this study, a two-stage optimization framework is proposed for cylindrical or flat stiffened panels under uniform or non-uniform axial compression, which are extensively used in the aerospace industry. In the first stage, traditional sizing optimization is performed. Based on the buckling or collapse-like deformed shape evaluated for the optimized design, the panel can be divided in sub-regions each of which shows characteristic deformations along axial and circumferential directions. Layout optimization is then performed using a stiffener spacing distribution function to represent the location of each stiffener. A layout coefficient is assigned to each sub-region and the overall layout of the panel is optimized. Three test problems are solved in order to demonstrate the validity of the proposed optimization framework: remarkably, the load-carrying capacity improves by 17.4 %, 66.2 % and 102.2 % with respect to the initial design.

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Title: Two-stage size-layout optimization of axially compressed stiffened panels
Authors: Bo Wang
Peng Hao
Gang Li
Kuo Tian
Kaifan Du
Xiaojun Wang
Xi Zhang
Xiaohan Tang
Publication date: 01-08-2014
Publisher: Springer Berlin Heidelberg
Published in: Structural and Multidisciplinary Optimization / Issue 2/2014
Print ISSN: 1615-147X
Electronic ISSN: 1615-1488
DOI: https://doi.org/10.1007/s00158-014-1046-6

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