A novel unsteady aerodynamic Reduced-Order Modeling method for transonic aeroelastic optimization

Ziyi Wang, Weiwei Zhang, Xiaojing Wu, Kongjin Chen

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

In aircraft design, structural optimization concerning transonic aeroelastic issues is computationally impractical, due to a great number of aeroelastic analyses are required in iterative process. Reduced-Order Model (ROM) method is convenient for transonic aeroelastic analyses; however, current ROMs are not reusable during iteration, hence the time consumption is still too high. To solve the problem, this study proposes an improved ROM suitable for Arbitrary Mode Shapes (ROM-AMS), which is reusable in iterative process. By adopting Principal Component Analysis, ROM-AMS method significantly reduces the number of basis mode shapes, while improves the accuracy of flutter analysis. In an optimization case, the weight of a cropped delta wing is reduced by 28.46%, and the efficiency is 900 times higher than that of traditional ROM approaches, which demonstrates the feasibility of this method in aeroelastic optimization.

Original languageEnglish
Pages (from-to)308-328
Number of pages21
JournalJournal of Fluids and Structures
Volume82
DOIs
StatePublished - Oct 2018

Keywords

  • Aeroelasticity
  • Flutter
  • Optimization
  • Reduced-order modeling
  • Transonic flow
  • Unsteady aerodynamics

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