Comparison of Structural Model Reduction Methods Applied to a Large-Deformation Wing Box

Renato Medeiros, Carlos cesnik, Olivia A Stodieck, Dario E Calderon, Jonathan E Cooper, Etienne Coetzee

Research output: Contribution to journalArticle (Academic Journal)peer-review

4 Citations (Scopus)
47 Downloads (Pure)


In this paper, the accuracy and practical capabilities of three different reduced-order models (ROMs) are explored: an enhanced implicit condensation and expansion (EnICE) model, a finite element beam model, and a finite volume beam model are compared for their capability to accurately predict the nonlinear structural response of geometrically nonlinear built-up wing structures. This work briefly outlines the different order reduction methods, highlighting the associated assumptions and computational effort. The ROMs are then used to calculate the wing deflection for different representative load cases and these results are compared with the global finite element model (GFEM) predictions when possible. Overall, the ROMs are found to be able to capture the nonlinear GFEM behaviour accurately, but differences are noticed at very large displacements and rotations due to local geometrical effects.
Original languageEnglish
Pages (from-to) 1687–1709
JournalThe Aeronautical Journal
Issue number 1292
Early online date8 Sept 2021
Publication statusE-pub ahead of print - 8 Sept 2021


  • reduced order models
  • Nonlinear beam models
  • wingbox modelling
  • aeroelasticity


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