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Mooring forces in a floating point-absorbing WEC system–a comparison between full-scale measurements and numerical simulations
Chalmers University of Technology, Sweden.
Chalmers University of Technology, Sweden.
Chalmers University of Technology, Sweden.
RISE Research Institutes of Sweden, Materials and Production, Applied Mechanics.ORCID iD: 0000-0001-7182-0872
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2020 (English)In: Ships and Offshore Structures, ISSN 1744-5302, E-ISSN 1754-212XArticle in journal (Refereed) Epub ahead of print
Abstract [en]

The study presents an investigation of Waves4Power’s WaveEL 3.0 wave energy converter (WEC). It was used as a reference for full-scale measurements of the mooring forces and buoy motions in a measurement campaign 2017 at an installation location off the coast of Runde in Norway. A numerical simulation model of the installation was developed in the DNV GL software SESAM. Unfortunately, the sea state conditions were not measured during the measurement campaign. Hence, a methodology was developed that used the recorded motion data to compute the sea state conditions at the test site. The simulated WEC motions based on the computed sea states agreed very well with the measured WEC motions. The measured and simulated mooring forces were compared under various environmental conditions. 3-hour sea state realizations are typically preferred in numerical simulations. However, influences from the tide at the test site showed that sea states were normally stationary for only 1–2 h. The measured and simulated average mooring forces agreed very well during 1-hour periods, whereas the simulations overestimated the mooring forces in 3-hour periods because of the tide. © 2020 The Author(s). 

Place, publisher, year, edition, pages
Taylor and Francis Ltd. , 2020.
Keywords [en]
Full-scale measurement, mooring force, numerical simulation, wave energy converter, Computer simulation, Computer software, Digital arithmetic, Mooring, Numerical models, Ocean currents, Environmental conditions, Floating points, Full scale measurements, Installation locations, Measurement campaign, Motion data, Wave energy converters, Wave energy conversion
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Natural Sciences
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URN: urn:nbn:se:ri:diva-44766DOI: 10.1080/17445302.2020.1746122Scopus ID: 2-s2.0-85082952023OAI: oai:DiVA.org:ri-44766DiVA, id: diva2:1426569
Available from: 2020-04-27 Created: 2020-04-27 Last updated: 2020-04-27Bibliographically approved

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Johnson, Erland

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