We propose a novel variational Wave Acquisition Stereo System (WASS) that exploits new stereo reconstruction techniques for accurate estimates of the spatio-temporal dynamics of ocean waves. WASS has a significant advantage as a low-cost system in both installation and maintenance. A stereo camera view provides three-dimensional data (both in space and time) whose statistical content is richer than that of a time series retrieved from wave gauges, ultrasonic instruments or buoys, the latter being expensive to install and maintain. Indeed, wave spectra can be easily estimated from the multi-dimensional images obtained with WASS. The estimated spectra present an inertial range that decays as k−2.5, k being the wave number, in agreement with wave turbulence theory (Zakharov 1999, Socquet-Juglard et al. 2005). Further, the empirical probability density functions derived from the reconstructed surface data compare very well with theoretical models (Tayfun & Fedele 2007, Fedele 2008). The variational WASS is a promising technology with broader impacts in offshore engineering since it will enrich the understanding of the statistics of waves for an improved design of offshore structures.
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ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering
June 15–20, 2008
Estoril, Portugal
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4821-0
PROCEEDINGS PAPER
Wave Statistics and Spectra via a Variational Wave Acquisition Stereo System
Guillermo Gallego,
Guillermo Gallego
Georgia Institute of Technology, Atlanta, GA
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Alvise Benetazzo,
Alvise Benetazzo
PROTECNO S.r.l., Padua, Italy
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Anthony Yezzi,
Anthony Yezzi
Georgia Institute of Technology, Atlanta, GA
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Francesco Fedele
Francesco Fedele
Georgia Institute of Technology, Savannah, GA
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Guillermo Gallego
Georgia Institute of Technology, Atlanta, GA
Alvise Benetazzo
PROTECNO S.r.l., Padua, Italy
Anthony Yezzi
Georgia Institute of Technology, Atlanta, GA
Francesco Fedele
Georgia Institute of Technology, Savannah, GA
Paper No:
OMAE2008-57160, pp. 801-808; 8 pages
Published Online:
July 27, 2009
Citation
Gallego, G, Benetazzo, A, Yezzi, A, & Fedele, F. "Wave Statistics and Spectra via a Variational Wave Acquisition Stereo System." Proceedings of the ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. Volume 4: Ocean Engineering; Offshore Renewable Energy. Estoril, Portugal. June 15–20, 2008. pp. 801-808. ASME. https://doi.org/10.1115/OMAE2008-57160
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