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Modélisation et optimisation d’un système de récupération de l’énergie des vagues électro-actif déformable

Abstract : Wave energy converters have greatly improved since the first generation in the 1970s. At first rigid with articulated sections, new wave energy converters are now entirely flexible like the S3 developped by the company SBM Offshore. The device is made of a water filled elastic tube closed at both ends and the radial deformations are directly converted into electricity by the use of electro-active polymere rings. The objective of this thesis is to develop a numerical model that can predict the behaviour of this flexible wave energy converter in any kind of environment. After performing scaled model tests, it has been possible to analyse the behaviour of the device and build a numerical model that takes into account the different physical effects acting on the wave energy converter. The numerical model is based on a modal decomposition of the tube deformations. The wall non-linear effects are taken into account with the use of the hyper-elastic theory and the wave-structure interaction is made possible with the linear boundary element method. Two different versions have been developped. One based on the linear frequency domain and the other working in the time domain in order to take into account the non-linear effects. Finally, The simulations are compared with the measures from the basin tests to validate the results.
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Submitted on : Wednesday, October 28, 2020 - 10:15:08 AM
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Benjamin Gendron. Modélisation et optimisation d’un système de récupération de l’énergie des vagues électro-actif déformable. Mécanique des fluides [physics.class-ph]. École centrale de Nantes, 2017. Français. ⟨NNT : 2017ECDN0024⟩. ⟨tel-02981611⟩

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