Wave loads on ocean infrastructure increase as a result of waves passing over abrupt depth transitions

Zhenhao Li; Tianning Tang; Yan Li; Samuel Draycott; Ton S. van den Bremer; Thomas A. A. Adcock

doi:10.1007/s40722-022-00269-4

Wave loads on ocean infrastructure increase as a result of waves passing over abrupt depth transitions

Zhenhao Li, Tianning Tang, Yan Li, Samuel Draycott, Ton S. van den Bremer, Thomas A. A. Adcock

Research output: Contribution to journal › Article › peer-review

Abstract

Abrupt changes in water depth are known to lead to abnormal free-surface wave statistics. The present study considers whether this translates into abnormal loads on offshore infrastructure. A fully non-linear numerical model is used which is carefully validated against experiments. The wave kinematics from the numerical model are used as input to a simple wave loading model. We find enhanced overturning moments, an increase of approximately 20%, occur over a distance of a few wavelengths after an abrupt depth transition. We observe similar results for 1:1 and 1:3 slopes. This increase does not occur in linear simulations.

Original language	English
Pages (from-to)	309–317
Journal	Journal of Ocean Engineering and Marine Energy
Volume	9
Early online date	23 Nov 2022
DOIs	https://doi.org/10.1007/s40722-022-00269-4
Publication status	Published - 1 May 2023

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10.1007/s40722-022-00269-4Licence: CC BY

Offshore Engineering and Energy
Stallard, T. (PI), Stansby, P. (PI), Draycott, S. (PI), Ouro, P. (PI), Mullings, H. (PI), Tang, T. (PI), Ali, K. (PGR student), Liao, Z. (Researcher), Mohamed, O. S. (Researcher), Araya Araya, D. (Researcher) & Zhang, Y. (Researcher)
1/01/05 → …
Project: Research

Cite this

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title = "Wave loads on ocean infrastructure increase as a result of waves passing over abrupt depth transitions",

abstract = "Abrupt changes in water depth are known to lead to abnormal free-surface wave statistics. The present study considers whether this translates into abnormal loads on offshore infrastructure. A fully non-linear numerical model is used which is carefully validated against experiments. The wave kinematics from the numerical model are used as input to a simple wave loading model. We find enhanced overturning moments, an increase of approximately 20\%, occur over a distance of a few wavelengths after an abrupt depth transition. We observe similar results for 1:1 and 1:3 slopes. This increase does not occur in linear simulations.",

author = "Zhenhao Li and Tianning Tang and Yan Li and Samuel Draycott and \{van den Bremer\}, \{Ton S.\} and Adcock, \{Thomas A. A.\}",

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AU - Draycott, Samuel

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AU - Adcock, Thomas A. A.

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AB - Abrupt changes in water depth are known to lead to abnormal free-surface wave statistics. The present study considers whether this translates into abnormal loads on offshore infrastructure. A fully non-linear numerical model is used which is carefully validated against experiments. The wave kinematics from the numerical model are used as input to a simple wave loading model. We find enhanced overturning moments, an increase of approximately 20%, occur over a distance of a few wavelengths after an abrupt depth transition. We observe similar results for 1:1 and 1:3 slopes. This increase does not occur in linear simulations.

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Wave loads on ocean infrastructure increase as a result of waves passing over abrupt depth transitions

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Offshore Engineering and Energy

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