Fatigue of polyamide mooring ropes for floating wind turbines

Type Article
Date 2018
Language English
Author(s) Chevillotte Yoan1, 2, Marco Yann1, Davies PeterORCID2, 3, Bles Guilhem1, Arhant Mael2
Affiliation(s) 1 : ENSTA Bretagne, Institut de Recherche Dupuy de Lômes (iRDL), FRE CNRS 3744,29200 Brest, France
2 : IFREMER, Marine Structures Laboratory,29200 Brest,France
3 : France Energies Marines, 29280 Plouzané, France
Meeting 12th International Fatigue Congress (FATIGUE 2018)
Source MATEC Web of Conferences (2261-236X) (EDP Sciences), 2018 , Vol. 165 , P. 10002 (1-7)
DOI 10.1051/matecconf/201816510002
Abstract

This paper describes a study of the fatigue characterization of polyamide mooring ropes for floating wind turbines. Under some conditions polyester ropes, which are favoured for offshore platform station-keeping, are too stiff for wind turbine moorings, and polyamide may be a suitable alternative. While early studies on fatigue of braided nylon ropes showed very short lifetimes some recent results have indicated that it is possible to significantly enhance lifetime by modifying rope construction and improving fibre coatings [1]. The fatigue results presented here for ropes from a different supplier, confirm this result. In order to develop an accelerated evaluation of the fatigue performance, heat build-up tests have been performed, and promising first results are shown. Finally, the influence of coating is examined by microscopy and yarn-on-yarn tests, in order to improve understanding of the fatigue mechanisms leading to failure.

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