Fluid-structure-soil interaction of a moored wave energy device

Research output: Chapter in Book/Conference paperConference paper

Abstract

This paper explores the response of a wave energy device during extreme and operational conditions and the effect of this response on the geotechnical stability of the associated taut moorings. The non-hydrostatic wave-flow model SWASH is used to simulate the response of a taut-moored wave energy converter. The predicted forces acting on the mooring system are used to compute the build-up of excess pore pressures in the soil around the mooring anchor and the resulting changes in strength and capacity. An initial loss of strength is followed by a subsequent increase in capacity, associated with long-term cyclic loading and hardening due to consolidation. The analyses show how cyclic loading may actually benefit and reduce anchoring requirements for wave energy devices. It demonstrates the viability of a close interdisciplinary approach towards an optimized and cost-effective design of mooring systems, which form a significant proportion of expected capital expenditures.

Original languageEnglish
Title of host publicationOcean Renewable Energy
PublisherThe American Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791858899
Publication statusPublished - 2019
EventASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019 - Glasgow, United Kingdom
Duration: 9 Jun 201914 Jun 2019

Publication series

NameProceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
Volume10

Conference

ConferenceASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019
CountryUnited Kingdom
CityGlasgow
Period9/06/1914/06/19

Fingerprint

Soil structure interactions
Mooring
Fluids
Pore pressure
Anchors
Consolidation
Hardening
Soils
Costs

Cite this

Tom, J. G., Rijnsdorp, D. P., Ragni, R., & White, D. J. (2019). Fluid-structure-soil interaction of a moored wave energy device. In Ocean Renewable Energy [omae2019-95419] (Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE; Vol. 10). The American Society of Mechanical Engineers (ASME).
Tom, Joe G. ; Rijnsdorp, Dirk P. ; Ragni, Raffaele ; White, David J. / Fluid-structure-soil interaction of a moored wave energy device. Ocean Renewable Energy. The American Society of Mechanical Engineers (ASME), 2019. (Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE).
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Tom, JG, Rijnsdorp, DP, Ragni, R & White, DJ 2019, Fluid-structure-soil interaction of a moored wave energy device. in Ocean Renewable Energy., omae2019-95419, Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE, vol. 10, The American Society of Mechanical Engineers (ASME), ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019, Glasgow, United Kingdom, 9/06/19.

Fluid-structure-soil interaction of a moored wave energy device. / Tom, Joe G.; Rijnsdorp, Dirk P.; Ragni, Raffaele; White, David J.

Ocean Renewable Energy. The American Society of Mechanical Engineers (ASME), 2019. omae2019-95419 (Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE; Vol. 10).

Research output: Chapter in Book/Conference paperConference paper

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AB - This paper explores the response of a wave energy device during extreme and operational conditions and the effect of this response on the geotechnical stability of the associated taut moorings. The non-hydrostatic wave-flow model SWASH is used to simulate the response of a taut-moored wave energy converter. The predicted forces acting on the mooring system are used to compute the build-up of excess pore pressures in the soil around the mooring anchor and the resulting changes in strength and capacity. An initial loss of strength is followed by a subsequent increase in capacity, associated with long-term cyclic loading and hardening due to consolidation. The analyses show how cyclic loading may actually benefit and reduce anchoring requirements for wave energy devices. It demonstrates the viability of a close interdisciplinary approach towards an optimized and cost-effective design of mooring systems, which form a significant proportion of expected capital expenditures.

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Tom JG, Rijnsdorp DP, Ragni R, White DJ. Fluid-structure-soil interaction of a moored wave energy device. In Ocean Renewable Energy. The American Society of Mechanical Engineers (ASME). 2019. omae2019-95419. (Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE).