Optimal design of stiffened panels under buckling constraints: A design methodology considering cad-based parameterization with simultaneous layout and sizing optimization

Hammad Rahman*, Roeland De Breuker, Saullo G.P. Castro

*Corresponding author for this work

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

An innovative design methodology is proposed for the simultaneous layout and sizing optimization of stiffened panels. A computer-aided design (CAD) modelling tool is used to generate the panel geometry and parameterize the stiffeners layout. The same geometric parameterization is used in the gradient-based optimization. Therefore no additional constraints are applied on grid points coordinates in order to conform with the geometric requirements. The proposed method also eliminates the extra step of converting the optimal design back to the CAD model. An effective parameterization scheme is used that defines the location and orientation of a stiffener with only two layout design variables. The sensitivities of the structural responses with respect to both layout and sizing design variables are computed through the semi-analytical method of Nastran. The proposed methodology is used to re-design a benchmark metallic stiffened panel from literature. The obtained results are used to demonstrate the effectiveness of the proposed method.

Original languageEnglish
Title of host publication33rd Congress of the International Council of the Aeronautical Sciences, ICAS 2022
PublisherInternational Council of the Aeronautical Sciences
Pages3616-3625
Number of pages10
ISBN (Electronic)9781713871163
Publication statusPublished - 2022
Event33rd Congress of the International Council of the Aeronautical Sciences, ICAS 2022 - Stockholm, Sweden
Duration: 4 Sept 20229 Sept 2022
Conference number: 33

Publication series

Name33rd Congress of the International Council of the Aeronautical Sciences, ICAS 2022
Volume5

Conference

Conference33rd Congress of the International Council of the Aeronautical Sciences, ICAS 2022
Abbreviated titleICAS 2022
Country/TerritorySweden
CityStockholm
Period4/09/229/09/22

Keywords

  • buckling
  • CAD-based parameterization
  • gradient-based optimization
  • metallic stiffened panel
  • Simultaneous layout and sizing optimization

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