| タイトル | Flutter of High-Speed Civil Transport Flexible Semispan Model: Time-Frequency Analysis |
| 著者（英） | Silva, Walter A.; Hajj, Muhammad R.; Chabalko, Christopher C. |
| 著者所属（英） | NASA Langley Research Center; Virginia Polytechnic Inst. and State Univ. |
| 発行日 | 2006-05-01 |
| 言語 | eng |
| 内容記述 | Time/frequency analysis of fluctuations measured by pressure taps and strain gauges in the experimental studies of the flexible semispan model of a high-speed civil transport wing configuration is performed. The interest is in determining the coupling between the aerodynamic loads and structural motions that led to the hard flutter conditions and loss of the model. The results show that, away from the hard flutter point, the aerodynamic loads at all pressure taps near the wing tip and the structural motions contained the same frequency components. On the other hand, in the flow conditions leading to the hard flutter, the frequency content of the pressure fluctuations near the leading and trailing edges varied significantly. This led to contribution to the structural motions over two frequency ranges. The ratio of these ranges was near 2:1, which suggests the possibility of nonlinear structural coupling. |
| NASA分類 | Aircraft Design, Testing and Performance |
| レポートNO | AIAA Paper 2004-1856 |
| 権利 | Copyright |
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