Abstract
Wavelet-based higher order spectral moments are implemented to detect the intermittent characteristics of nonlinear couplings in the experiments conducted in the Langley Transonic Dynamics Tunnel (TDT) at the NASA LaRC on a Flexible Semispan Model (FSM) of a High Speed Civil Transport (HSCT) wing configuration. The results show that right before "hard" flutter took place, the aerodynamic load and the structural motion of the FSM were intermittently and quadratically coupled. Because of the required averaging in implementing them, Fourier-based higher order spectral moments could not characterize this coupling. The wavelet analysis procedures presented here could be used for the detection of intermittent or transient nonlinear aeroelastic phenomena as would be encountered in flight tests.
| Original language | English |
|---|---|
| Pages (from-to) | 692-703 |
| Number of pages | 12 |
| Journal | Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference |
| Volume | 1 |
| DOIs | |
| State | Published - 2005 |
| Event | 46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Austin, TX, United States Duration: 18 Apr 2005 → 21 Apr 2005 |
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