Identification and characterization of a nonlinear aeroelastic system with freeplay and aerodynamic nonlinearities via higher–order spectra

Michael Candon, Robert Carrese, Hideaki Ogawa, Pier Marzocca, Carl Mouser, Oleg Levinskik, Walter A. Silva

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

1 被引用数 (Scopus)

抄録

The identification of nonlinear systems in aeroelasticity poses a significant challenge for practitioners, often hampered by the complex nature of aeroelastic response data which may contain multiple forms of nonlinearity. Characterizing and quantifying nonlinearity is further complicated when the dynamic oscillations are of a high–amplitude limit cycle form, masking the underlying nonlinear contributions. In the present paper, a three– degree–of–freedom airfoil with freeplay in the control surface and transonic aerodynamics is investigated. The main form of analysis is via higher–order spectra to unveil the form of nonlinearity that i) freeplay with linearized aerodynamics and ii) freeplay with nonlinear inviscid aerodynamic phenomena will produce. It is shown that the freeplay nonlinearity with linearized aerodynamics is characterized solely by cubic interactions, i.e., the quadratic interactions are negligible. However, when considering the Euler-based CFD simulations, as the amplitude of the of the oscillations increases and Type-B shock motion becomes more apparent, the strength of the quadratic interactions becomes prominent. The findings demonstrate how the interaction between the different types of nonlinearity and the different solution methods affect the nonlinear spectral content of the system and how different forms of nonlinearity can be characterized by their higher–order spectra.

本文言語英語
ホスト出版物のタイトル58th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2017
出版社American Institute of Aeronautics and Astronautics Inc, AIAA
ISBN(印刷版)9781624104534
出版ステータス出版済み - 2017
外部発表はい
イベント58th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2017 - Grapevine, 米国
継続期間: 1 9 20171 13 2017

出版物シリーズ

名前58th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2017

会議

会議58th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2017
国/地域米国
CityGrapevine
Period1/9/171/13/17

All Science Journal Classification (ASJC) codes

  • 材料力学
  • 建築
  • 土木構造工学
  • 建築および建設

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