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	Provedor de dados ArchiMer (3) Autor Saulnier, Jean Baptiste (3) Maisondieu, Christophe (2) Ashton, Ian (1) Prevosto, Marc (1) Smith, George H. (1) Palavra-chave Sea state (3) Spectral bandwidth (2) Wave system (2) Buoys array (1) Cohérence spatio temporelle (1) Densité spectrale (1) Directional buoys (1) Directional spectrum (1) Directional spreading (1) Directional wave spectrum (1) Gaussian processes (1) Groupement de vagues (1) Largeur spectrale (1) Maximum Likelihood Method (1) Maximum entropy method (1) Modèles stochastiques (1) Numerical simulations (1) Processus gaussiens (1) Simulations numériques (1) Spatiotemporal coherence (1) Mais... Tipo do documento Text (3) Ano 2012 (1) 2011 (1) 2009 (1) País France (3) Idioma Inglês (2) Francês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Climatologie fine des systèmes de vagues pour l'étude des systèmes houlomoteurs ArchiMer Saulnier, Jean Baptiste. This work focuses on the refinement of sea-states spectral characterisation in the frame of the development of wave energy converters (WECs). Until now, this characterisation has been limited to the consideration of basic global parameters such as the significant wave height and mean wave period. The present work namely underlines - thanks to simplified numerical models - that such a description is not sufficient to account for the performance of WECs, for they still exhibit a large variability in terms of mean production while wave energy and period are fixed. It is therefore needed to refine this description by introducing new wave characteristics, such as the wave groupiness, which is itself related to the sea-state's spectral bandwidth. The classical -... Tipo: Text Palavras-chave: Modèles stochastiques; Processus gaussiens; Simulations numériques; Cohérence spatio temporelle; Systèmes de vagues; Densité spectrale; État de mer; Largeur spectrale; Groupement de vagues; Systèmes houlomoteurs; Énergie des vagues; Stochastic models; Gaussian processes; Numerical simulations; Spatiotemporal coherence; Wave system; Spectral density; Sea state; Spectral bandwidth; Wave groupiness; WECs; Wave energy. Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/these-7414.pdf Refined sea state analysis from an array of four identical directional buoys deployed off the Northern Cornish coast (UK) ArchiMer Saulnier, Jean Baptiste; Maisondieu, Christophe; Ashton, Ian; Smith, George H.. This paper presents an analysis of sea states carried out from extended wave measurements realized near the Wave Hub wave energy test facility in Cornwall (UK). The space directional information is derived from the spectro-directional processing of time-domain data provided by an array of four independent SEAWATCH Mini II displacement buoys separated by an approximate average distance of 500 m. It is observed that, even though the size of the array is small compared to the local wave trains' length, the estimation of the directional spectra - using maximum entropy and likelihood methods - may sometimes exhibit certain space variability over the array. It was also observed that the tidal currents variations produced a significant influence upon the wave... Tipo: Text Palavras-chave: Directional wave spectrum; Directional buoys; Buoys array; Maximum entropy method; Maximum Likelihood Method; Sea state; Wave system; Spectro-directional partitioning; Wave stationarity/homogeneity; Wave/tide interactions. Ano: 2012 URL: http://archimer.ifremer.fr/doc/00098/20922/18739.pdf Refinements of sea state statistics for marine renewables: A case study from simultaneous buoy measurements in Portugal ArchiMer Saulnier, Jean Baptiste; Prevosto, Marc; Maisondieu, Christophe. This paper presents a refined description of the wave climate observed in a Portuguese location for marine energy projects. The data used in this case study were derived from 3-month in situ measurements carried out using three directional buoys that have been deployed simultaneously – yet independently (various buoy types and water depths) – on the Atlantic coast in the neighbourhood of Figueira da Foz. Two ways of reporting the statistics were adopted. In the first one, each recorded sea state was summarized as a set of global parameters accounting for energy, mean frequency and direction, spectral bandwidth and directional spreading related to the main ongoing wave field considered as unimodal. In the second one, each sea state has been decomposed into... Tipo: Text Palavras-chave: Sea state; Directional spectrum; Wave systems; Spectrum partitioning; Spectral bandwidth; Directional spreading. Ano: 2011 URL: http://archimer.ifremer.fr/doc/00037/14813/12196.pdf Registros recuperados: 3 Primeira ... 1 ... Última

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