Venkatramani, J. ; Nair, Vineeth ; Sujith, R. I. ; Gupta, Sayan ; Sarkar, Sunetra (2017) Multi-fractality in aeroelastic response as a precursor to flutter Journal of Sound and Vibration, 386 . pp. 390-406. ISSN 0022-460X
Full text not available from this repository.
Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.jsv.2016.10.004
Abstract
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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Aeroelastic Flutter; Multi-fractals; Hurst Exponent; Wind Tunnel Experiments; Precursor; Structural Health Monitoring |
| ID Code: | 109903 |
| Deposited On: | 21 Dec 2017 10:57 |
| Last Modified: | 21 Dec 2017 10:57 |
Repository Staff Only: item control page
