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Articles
Multi-fractality in aeroelastic response as a precursor to flutterPublished in Academic Press
2017
Volume: 386
Pages: 390 - 406
Wind tunnel tests on a NACA 0012 airfoil have been carried out to study the transition in aeroelastic response from an initial state characterised by low-amplitude aperiodic fluctuations to aeroelastic flutter when the system exhibits limit cycle oscillations. An analysis of the aeroelastic measurements reveals multi-fractal characteristics in the pre-flutter regime. This has not been studied in the literature. As the flow velocity approaches the flutter velocity from below, a gradual loss in multi-fractality is observed. Measures based on the generalised Hurst exponents are developed and are shown to have the potential to warn against impending aeroelastic flutter. The results of this study could be useful for health monitoring of aeroelastic structures. © 2016 Elsevier Ltd
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About the journal
| Journal | Journal of Sound and Vibration |
|---|---|
| Publisher | Academic Press |
| ISSN | 0022460X |
| Open Access | No |
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Concepts (11)
Aeroelasticity- Flow velocity
- Flutter (aerodynamics)
- Fractals
- Wind tunnels
- AEROELASTIC FLUTTER
- HURST EXPONENTS
- Multi fractals
- Precursor
- WIND TUNNEL EXPERIMENT
- Structural health monitoring
