Efficient aeroelastic analysis using unstructured CFD method and reduced-order unsteady aerodynamic model

Hiroyuki Morino, Hitoshi Yamaguchi, Takayasu Kumano, Shinkyu Jeong, Shigeru Obayashi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Flutter computations are presented for the AGARD 445.6 wing model and the Wing-Pylon-Nacelle configuration model using a fully implicit aeroelastic unstructured-mesh Euler solver coupled with a linear structural dynamics solver and Reduced-Order Model (ROM) based on the Volterra theory. The ROM is used for the rapid evaluation of nonlinear generalized unsteady aerodynamic forces (GAFs) both in a time-domain and a frequency-domain. The convolved time-domain GAFs agree well with direct computation results, and the frequency-domain GAFs at distinct values of reduced frequency are computed from the time-domain GAF responses to unit-amplitude harmonic excitation of elastic modes using a simple convolution scheme. The frequency-domain GAFs are processed using the Roger's approximation method in order to generate an unsteady aerodynamic state-space ROM, which is used for creating an aeroelastic state-space model. The aeroelastic state-space model is solved as a complex eigenvalue problem using MATLAB's® Toolbox to obtain V-g plots. The ROM-based flutter analysis is rapid and yields accurate results compared with experiment, direct simulation results and linear aerodynamics results by MSC/NASTRAN.

Original languageEnglish
Title of host publication50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Publication statusPublished - 2009 Dec 1
Event50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Palm Springs, CA, United States
Duration: 2009 May 42009 May 7

Other

Other50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
CountryUnited States
CityPalm Springs, CA
Period09/5/409/5/7

ASJC Scopus subject areas

  • Architecture
  • Materials Science(all)
  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Morino, H., Yamaguchi, H., Kumano, T., Jeong, S., & Obayashi, S. (2009). Efficient aeroelastic analysis using unstructured CFD method and reduced-order unsteady aerodynamic model. In 50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference [2009-2326]