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Suivi en service de la durée de vie des ombilicaux dynamiques pour l’éolien flottant

Abstract : The present work introduces a methodology to monitor fatigue damage of the dynamic power cable of a floating wind turbine. The suggested approach consists in using numerical simulations to compute the power cable response at the sea states observed on site. The quantities of interest are then obtained in any location along the cable length through the post-treatment of the simulations results. The cable has to be instrumented to quantify and to reduce the uncertainties on the calculated response of the power cable. Indeed some parameters of the numerical model should be calibrated on a regular basis in order to monitor the evolution of the cable properties that might change over time. In this context, this manuscript describes and compares various approaches to analyze the sensitivity of the power cable response to the variations of the parameters to be monitored. The purpose is to provide guidance in the choice of the instrumentation for the cable. Principal components analysis allows identifying the main modes of power cable response variations when the studied parameters are varied. Various methods are also assessed for the calibration of the monitored cable parameters. Special care is given to the quantification of the remaining uncertainty on the fatigue damage. The considered approaches are expensive to apply as they require a large number of model evaluations and as the numerical simulations durations are quite long. Surrogate models are thus employed to replace the numerical model and again different options are considered. The proposed methodology is applied to a simplified configuration which is inspired by the FLOATGEN project.
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https://tel.archives-ouvertes.fr/tel-01951659
Contributor : Abes Star :  Contact
Submitted on : Tuesday, December 11, 2018 - 3:34:07 PM
Last modification on : Friday, November 8, 2019 - 3:03:55 AM
Long-term archiving on: : Tuesday, March 12, 2019 - 3:15:14 PM

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  • HAL Id : tel-01951659, version 1

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Charles Spraul. Suivi en service de la durée de vie des ombilicaux dynamiques pour l’éolien flottant. Mécanique des fluides [physics.class-ph]. École centrale de Nantes, 2018. Français. ⟨NNT : 2018ECDN0007⟩. ⟨tel-01951659⟩

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