An Experimental Study of the Effects of a Nonlinear Store on the Steady-State Dynamics of a Test Airplane
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- 価格
- 一般価格(税込):¥6,600 会員価格(税込):¥5,280
- 文献・情報種別
- SAE Paper
No.2021-01-1117
- 掲載ページ
- 1-7(Total 7 p)
- 発行年月
- 2021年 8月
- 出版社
- SAE International
- 言語
- 英語
- イベント
- Noise and Vibration Conference & Exhibition
書誌事項
著者(英) | 1) Timothy Copeland, 2) Jon Dewitt Dalisay, 3) Lawrence Bergman, 4) Alexander Vakakis |
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勤務先(英) | 1) M+P International Inc., 2) University of Illinois, 3) University of Illinois, 4) University of Illinois |
抄録(英) | Local nonlinearities can affect the global dynamics of their linear host structures. In the context of fixed-wing aircraft, failure of store mounting can result in strong local nonlinearities. In this work, we experimentally mimic store mounting failure conditions in a model airplane subject to harmonic excitation. Two identical stores are mounted under the wings and are placed symmetrically opposite each other. The configuration where both stores are “locked”, i.e., mounting is very stiff, serves as the baseline linear system. The second configuration involves unlocking one of the stores, enabling a geometrically nonlinear flexure connection between the unlocked store and the wing. The flexure lets the store interact with the first flexible mode of the airplane, resulting in large relative displacements between the store and wing. In addition, the configuration allows for vibro-impacts between the wing and store. Results show that the strong local vibro-impacts enable excitation of high-frequency modes unexcited in the baseline linear system. This is indicative of energy transfer from low to high frequency modes of the primary structure. 翻訳 |