Loading performance of fish and OMNI-Max anchors in crust-over-soft clays

Research output: Contribution to journalArticle

Abstract

This paper reports the results from three-dimensional dynamic finite element analysis undertaken to provide insight into the behaviour of the fish and OMNI-max dynamically installed anchors during loading in crust-over-soft clay sediments. Particular attention was focused on the situations where the anchor is embedded to a shallow depth during dynamic installation due to the strong crust layer. Large deformation finite element analyses were carried out using the coupled Eulerian-Lagrangian approach, incoporating the anchor chain effect. Parametric analyses were undertaken varying the initial embedment depth, anchor shape, loading angle, strength ratio between the top and bottom layers. The tracked anchor trajectory confirmed that the diving potential of the fish and OMNI-Max anchors were enhanced by the presence of the crust layer as that somewhat restircted the upward movement. This will be beneficial for many hydrocarbon active regions with layered seabed sediments where the anchor embedment depths during dynamic installation are expected to be low.

Original languageEnglish
Article number101904
JournalApplied Ocean Research
Volume91
DOIs
Publication statusPublished - 1 Oct 2019

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Anchors
Fish
Clay
Sediments
Hydrocarbons
Trajectories
Finite element method

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title = "Loading performance of fish and OMNI-Max anchors in crust-over-soft clays",
abstract = "This paper reports the results from three-dimensional dynamic finite element analysis undertaken to provide insight into the behaviour of the fish and OMNI-max dynamically installed anchors during loading in crust-over-soft clay sediments. Particular attention was focused on the situations where the anchor is embedded to a shallow depth during dynamic installation due to the strong crust layer. Large deformation finite element analyses were carried out using the coupled Eulerian-Lagrangian approach, incoporating the anchor chain effect. Parametric analyses were undertaken varying the initial embedment depth, anchor shape, loading angle, strength ratio between the top and bottom layers. The tracked anchor trajectory confirmed that the diving potential of the fish and OMNI-Max anchors were enhanced by the presence of the crust layer as that somewhat restircted the upward movement. This will be beneficial for many hydrocarbon active regions with layered seabed sediments where the anchor embedment depths during dynamic installation are expected to be low.",
keywords = "Crust-over-soft clays, Dynamically installed anchors, Loading, Numerical modelling, Offshore engineering",
author = "Kim, {Y. H.} and Hossain, {M. S.} and Lee, {J. K.}",
year = "2019",
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language = "English",
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Loading performance of fish and OMNI-Max anchors in crust-over-soft clays. / Kim, Y. H.; Hossain, M. S.; Lee, J. K.

In: Applied Ocean Research, Vol. 91, 101904, 01.10.2019.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Kim, Y. H.

AU - Hossain, M. S.

AU - Lee, J. K.

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AB - This paper reports the results from three-dimensional dynamic finite element analysis undertaken to provide insight into the behaviour of the fish and OMNI-max dynamically installed anchors during loading in crust-over-soft clay sediments. Particular attention was focused on the situations where the anchor is embedded to a shallow depth during dynamic installation due to the strong crust layer. Large deformation finite element analyses were carried out using the coupled Eulerian-Lagrangian approach, incoporating the anchor chain effect. Parametric analyses were undertaken varying the initial embedment depth, anchor shape, loading angle, strength ratio between the top and bottom layers. The tracked anchor trajectory confirmed that the diving potential of the fish and OMNI-Max anchors were enhanced by the presence of the crust layer as that somewhat restircted the upward movement. This will be beneficial for many hydrocarbon active regions with layered seabed sediments where the anchor embedment depths during dynamic installation are expected to be low.

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