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Fatigue of improved polyamide mooring ropes for floating wind turbines ArchiMer
Chevillotte, Yoan; Marco, Yann; Bles, Guilhem; Devos, Karel; Keryer, Mathieu; Arhant, Mael; Davies, Peter.
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 oil and gas 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. In this paper yarn-on-yarn abrasion testing is used first to evaluate a new yarn coating. Significant lifetime enhancement was noted, so fatigue testing of ropes was then performed. Results confirm that excellent fatigue...
Tipo: Text Palavras-chave: Fatigue; Rope; Nylon; Mooring; Water; Floating wind turbine.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00607/71884/70609.pdf
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Drifting buoys GDAC NetCDF data and metadata format ArchiMer
Drifter Data Management Team,.
The present document describes the data formats recognized by the drifting buoys GDAC. The document details the NetCDF data format distributed by the GDAC. Correspondence tables between all the data formats and WIGOS metadata are also included.
Tipo: Text Palavras-chave: OceanSITES; Physical oceanography; In-situ marine data; Mooring; Operational oceanography.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00409/52037/52704.pdf
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Assessing the performance durability of elastomeric moorings: Assembly investigations enhanced by sub-component tests ArchiMer
Gordelier, T.; Parish, D.; Thies, P. R.; Weller, S.; Davies, Peter; Le Gac, Pierre-yves; Johanning, L..
The growing marine renewable energy sector has led to a demand for increasingly compliant mooring systems. In response, several innovative mooring tethers have been proposed demonstrating potential customisation to the stiffness profile and reduced peak mooring loads. Many of these novel systems utilise materials in a unique application within the challenging marine environment and their long term durability remains to be proven. This paper presents a multifaceted investigation into the durability of a novel polyester mooring tether with an elastomeric core. Laboratory based functionality tests are repeated on tether assemblies following a 6 month sea deployment. Results show a 45% average increase in dynamic axial stiffness. This is supported by high...
Tipo: Text Palavras-chave: Marine energy; Mooring; Elastomer; Durability; EPDM; Component testing.
Ano: 2018 URL: http://archimer.ifremer.fr/doc/00434/54605/55987.pdf
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The influence of bottom currents on the Zambezi Valley morphology (Mozambique Channel, SW Indian Ocean): In situ current observations and hydrodynamic modelling ArchiMer
Miramontes, Elda; Penven, Pierrick; Fierens, Ruth; Droz, Laurence; Toucanne, Samuel; Jorry, Stephan; Jouet, Gwenael; Pastor, Lucie; Silva Jacinto, Ricardo; Gaillot, Arnaud; Giraudeau, Jacques; Raisson, François.
Mixed turbidite-contourite systems can be found in oceans where bottom currents and turbidity currents interact. The Zambezi turbidite system, located in the Mozambique Channel (SW Indian Ocean), is one of the largest sedimentary systems in the world in length and area of the related catchments. The oceanic circulation in the Mozambique Channel is intense and complex, dominated by eddies flowing southwards and deep currents flowing northwards along the Mozambican margin. Current measurements obtained from moorings at 3400–4050 m water depth in the Zambezi and Tsiribihina valleys show periods of intense currents at the seafloor with peaks of 40–50 cm s−1 that last up to one month and are not related to turbidity currents. These strong bottom-current events...
Tipo: Text Palavras-chave: Contourite; Turbidity current; Mixed system; Oceanic circulation; Mooring; ADCP; ROMS model; Bedform.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00476/58743/61269.pdf
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OceanSITES Data Format Reference Manual. NetCDF Conventions and Reference Tables ArchiMer
OceanSITES data management team.
The OceanSITES program is the global network of open-ocean sustained time series sites, called ocean reference stations, being implemented by an international partnership of researchers. The main purpose of this document is to specify the format of the files that are used to distribute OceanSITES data, and to document the standards used therein. This includes naming conventions, or taxonomy, as well as metadata content.
Tipo: Text Palavras-chave: OceanSITES; Physical oceanography; In-situ marine data; Mooring; Operational oceanography.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00250/36149/34703.pdf
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OceanSITES User’s Manual. NetCDF Conventions and Reference Tables ArchiMer
OceanSITES data management team.
The OceanSITES program is the global network of open-ocean sustained time series sites, called ocean reference stations, being implemented by an international partnership of researchers. The main purpose of this document is to specify the format of the files that are used to distribute OceanSITES data, and to document the standards used therein. This includes naming conventions, or taxonomy, as well as metadata content.
Tipo: Text Palavras-chave: OceanSITES; Physical oceanography; In-situ marine data; Mooring; Operational oceanography.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00250/36148/34702.pdf
Registros recuperados: 6
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