02487oam 2200361 450 991077487850332120230725053144.0(CKB)3460000000088112(NjHacI)993460000000088112(EXLCZ)99346000000008811220121230c2011uuuu uu 0itauuau#---uu|uutxtrdacontentnrdamediancrdacarrierAn integrated nonlinear wind-waves model for offshore wind turbines /Enzo MarinoFirenze :Firenze University Press,20111 online resource (230 pages) illustrations; digital, PDF file(s)Premio FUP. Tesi di dottorato ;22Print version: 9788866550518 Includes bibliographical references.This thesis presents a numerical model capable of simulating offshore wind turbines exposed to extreme loading conditions. External condition-based extreme responses are reproduced by coupling a fully nonlinear wave kinematic solver with a hydro-aero-elastic simulator. First, a two-dimensional fully nonlinear wave simulator is developed. The transient nonlinear free surface problem is formulated assuming the potential theory and a high-order boundary element method is implemented to discretize Laplace's equation. For temporal evolution a second-order Taylor series expansion is used. The code, after validation with experimental data, is successfully adopted to simulate overturning plunging breakers which give rise to dangerous impact loads when they break against wind turbine substructures. Emphasis is then placed on the random nature of the waves. Indeed, through a domain decomposition technique a global simulation framework embedding the numerical wave simulator into a more general stochastic environment is developed. The proposed model is meant as a contribution to meet the more and more pressing demand for research in the offshore wind energy sector as it permits taking into account dangerous effects on the structural response so as to increase the global structural safety level.Premio FUP. Tesi di dottorato ;22.Nonlinear wavesNonlinear waves.531.1133Marino Enzo301253UkMaJRUBOOK9910774878503321An integrated nonlinear wind-waves model for offshore wind turbines3662737UNINA