Nonlinear modelling of wave-structureinteractions applied to off shorewind turbine platforms

Abstract : This PhD work is devoted to the study of nonlinear interactions between waves and floating rigid structures. The developed model relies on a boundary element method which reduces the dimensionality of the problem by one. First, a 2D model is applied to basic geometries and allows us to demonstrate the validity of the method for predicting the motion of a floating structrure subject to incoming monochromatic regular waves. Secondly, getting inspired by the 3D fully nonlinear potential flow model of Grilli textit{et al.}~cite{grilli2001fully}, we propose a novel model which generalizes the method for unstructured triangular meshes of 3D surfaces. The proposed model is able to deal with arbitrary configurations of multiple vertical cylinders interacting with the waves. We present academic validation test cases which show how the model works and behaves. Finally, we study situations of interest for EDF R&D related to floating off-shore wind turbines. A semi-submersible platform is evaluated with the nonlinear model
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Submitted on : Monday, October 12, 2015 - 11:04:50 AM
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Emmanuel Dombre. Nonlinear modelling of wave-structureinteractions applied to off shorewind turbine platforms. Mechanics of the fluids [physics.class-ph]. Université Paris-Est, 2015. English. ⟨NNT : 2015PESC1050⟩. ⟨tel-01214385⟩

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