Characterization of the nonlinear aeroelastic behavior of an airfoil with freeplay and aerodynamic nonlinearity

Michael Candon, Robert Carrese, Hideaki Ogawa, Pier Marzocca

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

抄録

Higher-order spectra (HOS) are utilized to investigate the nonlinear flutter behavior of a two-dimensional pitch/plunge airfoil system in transonic flow with freeplay and aerodynamic nonlinearity. It is shown that on the route to diverging flutter the system begins with the pitching and plunging modes being uncoupled and undergoes various evolutions exhibiting quasi-periodic behavior as it moves towards an ordered state of high-amplitude periodic limit cycle behavior. New physical insights come from the bispectral densities being computed at critical stages as the system evolves from through different stages of periodicity with the coalescence of the pitching and plunging frequencies into a single coupled limit cycle. Based on these estimates the nonlinear interaction mechanisms which occur within the nonlinear aeroelastic system prior to diverging flutter can be characterized. Furthermore, aerodynamic nonlinearity in the form of Tijdeman Type-B shock motion is quantified and its effect in combination with freeplay assessed.

本文言語英語
ホスト出版物のタイトル30th Congress of the International Council of the Aeronautical Sciences, ICAS 2016
出版社International Council of the Aeronautical Sciences
ISBN(電子版)9783932182853
出版ステータス出版済み - 2016
外部発表はい
イベント30th Congress of the International Council of the Aeronautical Sciences, ICAS 2016 - Daejeon, 韓国
継続期間: 9月 25 20169月 30 2016

出版物シリーズ

名前30th Congress of the International Council of the Aeronautical Sciences, ICAS 2016

その他

その他30th Congress of the International Council of the Aeronautical Sciences, ICAS 2016
国/地域韓国
CityDaejeon
Period9/25/169/30/16

!!!All Science Journal Classification (ASJC) codes

  • 航空宇宙工学
  • 制御およびシステム工学
  • 電子工学および電気工学
  • 材料科学一般

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