Accuracy of Directional Spectrum Estimation in 2nd Order Multidirectional Waves

Sarah Krogh Iversen; Thomas Lykke Andersen; Peter Frigaard

Accuracy of Directional Spectrum Estimation in 2nd Order Multidirectional Waves

Sarah Krogh Iversen^*, Thomas Lykke Andersen, Peter Frigaard

^*Corresponding author for this work

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

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Abstract

For design validation of offshore structures and conceptualisation of wave energy converters, physical model testing performed in wave basin laboratories is often applied. In such cases, knowledge about the wave conditions is of great significance. For validation of the wave condition in such tests, different methods for estimation of the directional wave spectra may be applied. However, different assumptions are imposed in the methods and deviations here from provide uncertainties in the results. The following paper quantifies the influence of nonlinear effects on the accuracy of the estimated directional wave spectra. This is done by analysis of idealised, synthetically generated waves based on second order wave theory and secondly with simplified amplitude dispersion included. The present analyses show that the uncertainties of the directional wave spectra are proportional to the level of nonlinearity present in the wave field.

Original language	English
Title of host publication	Proceedings of the Thirty-third (2023) International Ocean and Polar Engineering Conference
Number of pages	8
Place of Publication	Ottawa
Publisher	International Society of Offshore & Polar Engineers
Publication date	18 Jun 2023
Pages	2395-2403
ISBN (Electronic)	978-1-880653-80-7
Publication status	Published - 18 Jun 2023
Event	The Thirty-third (2023) International Ocean and Polar Engineering Conference - Westin Hotel, Ottawa, Canada Duration: 18 Jun 2023 → 22 Jun 2023

Conference

Conference	The Thirty-third (2023) International Ocean and Polar Engineering Conference
Location	Westin Hotel
Country/Territory	Canada
City	Ottawa
Period	18/06/2023 → 22/06/2023

Series	Proceedings of the International Offshore and Polar Engineering Conference
ISSN	1098-6189

Keywords

Directional wave spectrum
wave analysis
nonlinear waves
MLM
PTPD
second order wave theory
multidirectional waves

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Iversen, S. K., Andersen, T. L., & Frigaard, P. (2023). Accuracy of Directional Spectrum Estimation in 2nd Order Multidirectional Waves. In Proceedings of the Thirty-third (2023) International Ocean and Polar Engineering Conference (pp. 2395-2403). International Society of Offshore & Polar Engineers. https://onepetro.org/ISOPEIOPEC/proceedings-abstract/ISOPE23/All-ISOPE23/ISOPE-I-23-346/524699?redirectedFrom=PDF

Iversen, Sarah Krogh ; Andersen, Thomas Lykke ; Frigaard, Peter. / Accuracy of Directional Spectrum Estimation in 2nd Order Multidirectional Waves. Proceedings of the Thirty-third (2023) International Ocean and Polar Engineering Conference. Ottawa : International Society of Offshore & Polar Engineers, 2023. pp. 2395-2403 (Proceedings of the International Offshore and Polar Engineering Conference).

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title = "Accuracy of Directional Spectrum Estimation in 2nd Order Multidirectional Waves",

abstract = "For design validation of offshore structures and conceptualisation of wave energy converters, physical model testing performed in wave basin laboratories is often applied. In such cases, knowledge about the wave conditions is of great significance. For validation of the wave condition in such tests, different methods for estimation of the directional wave spectra may be applied. However, different assumptions are imposed in the methods and deviations here from provide uncertainties in the results. The following paper quantifies the influence of nonlinear effects on the accuracy of the estimated directional wave spectra. This is done by analysis of idealised, synthetically generated waves based on second order wave theory and secondly with simplified amplitude dispersion included. The present analyses show that the uncertainties of the directional wave spectra are proportional to the level of nonlinearity present in the wave field. ",

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Iversen, SK , Andersen, TL & Frigaard, P 2023, Accuracy of Directional Spectrum Estimation in 2nd Order Multidirectional Waves. in Proceedings of the Thirty-third (2023) International Ocean and Polar Engineering Conference. International Society of Offshore & Polar Engineers, Ottawa, Proceedings of the International Offshore and Polar Engineering Conference, pp. 2395-2403, The Thirty-third (2023) International Ocean and Polar Engineering Conference, Ottawa, Ontario, Canada, 18/06/2023. <https://onepetro.org/ISOPEIOPEC/proceedings-abstract/ISOPE23/All-ISOPE23/ISOPE-I-23-346/524699?redirectedFrom=PDF>

Accuracy of Directional Spectrum Estimation in 2nd Order Multidirectional Waves. / Iversen, Sarah Krogh ; Andersen, Thomas Lykke ; Frigaard, Peter.
Proceedings of the Thirty-third (2023) International Ocean and Polar Engineering Conference. Ottawa: International Society of Offshore & Polar Engineers, 2023. p. 2395-2403 (Proceedings of the International Offshore and Polar Engineering Conference).

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

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AU - Iversen, Sarah Krogh

AU - Andersen, Thomas Lykke

AU - Frigaard, Peter

PY - 2023/6/18

Y1 - 2023/6/18

N2 - For design validation of offshore structures and conceptualisation of wave energy converters, physical model testing performed in wave basin laboratories is often applied. In such cases, knowledge about the wave conditions is of great significance. For validation of the wave condition in such tests, different methods for estimation of the directional wave spectra may be applied. However, different assumptions are imposed in the methods and deviations here from provide uncertainties in the results. The following paper quantifies the influence of nonlinear effects on the accuracy of the estimated directional wave spectra. This is done by analysis of idealised, synthetically generated waves based on second order wave theory and secondly with simplified amplitude dispersion included. The present analyses show that the uncertainties of the directional wave spectra are proportional to the level of nonlinearity present in the wave field.

AB - For design validation of offshore structures and conceptualisation of wave energy converters, physical model testing performed in wave basin laboratories is often applied. In such cases, knowledge about the wave conditions is of great significance. For validation of the wave condition in such tests, different methods for estimation of the directional wave spectra may be applied. However, different assumptions are imposed in the methods and deviations here from provide uncertainties in the results. The following paper quantifies the influence of nonlinear effects on the accuracy of the estimated directional wave spectra. This is done by analysis of idealised, synthetically generated waves based on second order wave theory and secondly with simplified amplitude dispersion included. The present analyses show that the uncertainties of the directional wave spectra are proportional to the level of nonlinearity present in the wave field.

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EP - 2403

BT - Proceedings of the Thirty-third (2023) International Ocean and Polar Engineering Conference

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ER -

Iversen SK , Andersen TL , Frigaard P. Accuracy of Directional Spectrum Estimation in 2nd Order Multidirectional Waves. In Proceedings of the Thirty-third (2023) International Ocean and Polar Engineering Conference. Ottawa: International Society of Offshore & Polar Engineers. 2023. p. 2395-2403. (Proceedings of the International Offshore and Polar Engineering Conference).

Accuracy of Directional Spectrum Estimation in 2nd Order Multidirectional Waves

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Hydrodynamic Response of Exowave in Directional Waves

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