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Modeling and Service Life Monitoring of Mooring Lines of Floating Wind Turbines

Abstract : In this work a methodology for service life monitoring of mooring lines of floating wind turbines is proposed. First, an empirical expression of dynamic stiffness of a nylon rope is obtained from the testing data in the literature. A practical modeling procedure is proposed which allows accounting for the non-linear dynamic axial stiffness of nylon mooring ropes. The second part is devoted to the prediction of fatigue life of mooring lines. Cutting-edge methods for fatigue analysis in frequency domain and for simulation of nonlinear mooring response are investigated in order to perform a quick fatigue estimate and strength check in a reliability framework. The present methodology aims to support making decisions regarding maintenance or replacement of lines based on the level of reliability estimated during the expected service life.
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  • HAL Id : tel-02466337, version 1

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Hong-Duc Pham. Modeling and Service Life Monitoring of Mooring Lines of Floating Wind Turbines. Mechanics of the solides [physics.class-ph]. École centrale de Nantes, 2019. English. ⟨NNT : 2019ECDN0030⟩. ⟨tel-02466337⟩

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