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

^*Corresponding author for this work

Environmental Fluid Mechanics

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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
Number of pages	9
Journal	Journal of Ocean Engineering and Marine Energy
Volume	9
Issue number	2
DOIs	https://doi.org/10.1007/s40722-022-00269-4
Publication status	Published - 2022

Keywords

Abrupt depth transitions
Kinematics
Ocean waves
OceanWave3D
Steps
Wave loads

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1007/s40722-022-00269-4

s40722-022-00269-4Final published version, 1.44 MBLicence: CC BY

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.",

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AU - Li, Zhenhao

AU - Tang, Tianning

AU - Li, Yan

AU - Draycott, Samuel

AU - van den Bremer, Ton S.

AU - Adcock, Thomas A.A.

PY - 2022

Y1 - 2022

N2 - 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.

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.

KW - Abrupt depth transitions

KW - Kinematics

KW - Ocean waves

KW - OceanWave3D

KW - Steps

KW - Wave loads

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JO - Journal of Ocean Engineering and Marine Energy

JF - Journal of Ocean Engineering and Marine Energy

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ER -

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

Abstract

Keywords

UN SDGs

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