Suction anchors for deepwater applications

Andersen, Knut H.; Murff, James D.; Randolph, Mark; Clukey, Edward C.; Erbrich, Carl; Jostad, Hans Petter; Hansen, Brett; Aubeny, Charles; Sharma, Partha; Supachawarote, Chairat

doi:10.1201/noe0415390637.ch1

Cited by 17 publications

(6 citation statements)

References 5 publications

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“…The particle diameters paper were greater than 0.075 mm and less than 1.0 mm, so the gradin The grading curve of quartz sand is shown in Figure 2. The minimum densities of the sand were 1.39 g/cm 3 and 1.66 g/cm 3 , respectively. Th model tests had a relative density of 0.75, that is, the dry density was 1…”

Section: Soil Preparationmentioning

confidence: 94%

“…The grading curve of quartz sand is shown in Figure 2. The minimum and maximum dry densities of the sand were 1.39 g/cm 3 and 1.66 g/cm 3 , respectively. The sand used in the model tests had a relative density of 0.75, that is, the dry density was 1.5 g/cm 3 .…”

Section: Soil Preparationmentioning

confidence: 94%

“…Steel cylinder structures are widely used in offshore platforms [1][2][3][4][5], offshore wind power [6][7][8][9][10][11], mooring anchors [12][13][14], breakwaters or sea walls [15] and other projects. When designing steel cylinders, in addition to the loads that may be imposed on the steel cylinder structure during normal operation, the stress characteristics of the steel cylinder structure during construction should also be considered.…”

Section: Introductionmentioning

confidence: 99%

“…Numerous scholars have performed considerable research on the penetration process of steel cylinders by model tests [3,7,[16][17][18][19][20][21][22]. These studies can be summarized as the study of the flow law of soil and the stress change of the structure during the suction installation of a steel cylinder with a certain wall thickness.…”

Section: Introductionmentioning

confidence: 99%

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Penetration Performance of Steel Cylinders in Sand Foundations

Xu,

Ruan,

Jiang

2023

Applied Sciences

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In order to study the effect of wall thickness on the penetration process of steel cylinders, we carried out physical tests and numerical simulations of the penetration process of steel cylinders with different wall thicknesses in sandy soil foundations, focusing on analyzing the penetration force and soil uplift during the penetration process of steel cylinders. The results show that the coupled Eulerian-Lagrangian (CEL) approach can be used to simulate the penetration process of steel cylinders. During the penetration of steel cylinders with different wall thicknesses, the relationship between the penetration force and penetration depth can be approximated by a quadratic function. The larger the wall thickness is, the larger the plug volume inside the steel cylinder during penetration. The research results can provide support for the design and construction of steel cylinders.

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Section: Soil Preparationmentioning

confidence: 94%

Section: Soil Preparationmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Penetration Performance of Steel Cylinders in Sand Foundations

Xu,

Ruan,

Jiang

2023

Applied Sciences

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“…To obtain the maximum holding capacity, an optimal depth for the attachment point is usually considered in the geotechnical design (DNVGL-RP-303), expressed as either zp,op, optimum depth of 1337 (2024) 012066 IOP Publishing doi:10.1088/1755-1315/1337/1/012066 2 padeye, or zcl,op, optimal depth of attachment point at centerline (intersection of the loading vector with the centreline of the anchor). In some cases, the attachment point depth was designed below the optimal depth in order to ensure backward rotation at failure to mitigate the potential effect of crack on the capacity of anchors (Andersen et al 2005;Andersen and Jostad, 1999). However, the existence of the offset between the attached depth and optimal depth, denoted as e in Figure 1, results in a moment load (M) at the optimal attachment point in addition to the vertical (V) and horizontal (H) components, which tends to reduce the holding capacity of anchor.…”

Section: Loading Conditions For Current Suction Anchorsmentioning

confidence: 99%

Holding capacity of suction anchors under combined loading

Wang,

Petter Jostad,

Zhou

2024

IOP Conf. Ser.: Earth Environ. Sci.

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This paper introduces a numerical investigation aimed at evaluating the Vertical, Horizontal, and Moment (VHM) yield surface of suction anchors. It employs a generalized elliptical function guided by a predefined fitting strategy. The resulting yield surfaces are then juxtaposed with findings from previous studies, establishing the groundwork for the macro model of suction anchors in clay. This model plays a pivotal role in the integrated analysis of mooring systems for floating wind turbines.

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Seabed structures and foundations related to deep‐sea resource development: A review based on design and research

Rui

Zhang

et al. 2023

Deep Underground Science and Engineering

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The deep‐sea ground contains a huge amount of energy and mineral resources, for example, oil, gas, and minerals. Various infrastructures such as floating structures, seabed structures, and foundations have been developed to exploit these resources. The seabed structures and foundations can be mainly classified into three types: subsea production structures, offshore pipelines, and anchors. This study reviewed the development, installation, and operation of these infrastructures, including their structures, design, installation, marine environment loads, and applications. On this basis, the research gaps and further research directions were explored through this literature review. First, different floating structures were briefly analyzed and reviewed to introduce the design requirements of the seabed structures and foundations. Second, the subsea production structures, including subsea manifolds and their foundations, were reviewed and discussed. Third, the basic characteristics and design methods of deep‐sea pipelines, including subsea pipelines and risers, were analyzed and reviewed. Finally, the installation and bearing capacity of deep‐sea subsea anchors and seabed trench influence on the anchor were reviewed. Through the review, it was found that marine environment conditions are the key inputs for any offshore structure design. The fabrication, installation, and operation of infrastructures should carefully consider the marine loads and geological conditions. Different structures have their own mechanical problems. The fatigue and stability of pipelines mainly depend on the soil‐structure interaction. Anchor selection should consider soil types and possible trench formation. These focuses and research gaps can provide a helpful guide on further research, installation, and operation of deep‐sea structures and foundations.

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Suction anchors for deepwater applications

Cited by 17 publications

References 5 publications

Penetration Performance of Steel Cylinders in Sand Foundations

Penetration Performance of Steel Cylinders in Sand Foundations

Holding capacity of suction anchors under combined loading

Seabed structures and foundations related to deep‐sea resource development: A review based on design and research

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