Industry Trends for Design of Anchoring Systems for Deepwater Offshore Structures

Eltaher, Ayman; Rajapaksa, Yatendra; Chang, Kuan Tao

doi:10.4043/15265-ms

Cited by 11 publications

(3 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This study, therefore, has four goals: (1) to make a first step toward coupling proven codes from the wind power and oil and gas industries to create a tool to model and analyze the behavior of coupled wind turbine and floating platform systems; (2) to study and understand the behavior of these systems in various wind and wave environments; (3) to identify the most cost-effective structures that will provide a solution to the deep water problem; and (4) to avoid the need to install the wind turbine on the platform while at sea.…”

Section: Introductionmentioning

confidence: 99%

Coupled Dynamic Modeling of Floating Wind Turbine Systems

Wayman

Sclavounos

Butterfield

et al. 2006

Offshore Technology Conference

155

139

View full text Add to dashboard Cite

This paper was selected for presentation by an OTC Program Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the Offshore Technology Conference and are subject to correction by the author(s). The material, as presented, does not necessarily reflect any position of the Offshore Technology Conference, its officers, or members. Papers presented at OTC are subject to publication review by Sponsor Society Committees of the Offshore Technology Conference. Electronic reproduction, distribution, or storage of any part of this paper for commercial purposes without the written consent of the Offshore Technology Conference is prohibited.

show abstract

Section: Introductionmentioning

confidence: 99%

Coupled Dynamic Modeling of Floating Wind Turbine Systems

Wayman

Sclavounos

Butterfield

et al. 2006

Offshore Technology Conference

155

139

View full text Add to dashboard Cite

show abstract

“…The aspect ratio of the suction pile changes from 7:1 for soft clay to 2:1 for stiff clay based on the seabed conditions (Eltaher et al, 2003). Suctions was first applied in 1980s, and has a wide application in deep‐sea due to its low cost and easy installation.…”

Section: Subsea Production Structuresmentioning

confidence: 99%

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

View full text Add to dashboard Cite

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.

show abstract

“…For flexible piles, the OLP is chosen to strike an optimum balance between the pile length and the pile cross-section, which are governed by the axial component of the mooring load and the bending caused by the lateral component of the mooring load, respectively (Eltaher et al, 2003). FE analysis was performed by Ramadan et al (2015) to quantify the effect of padeye depth on the behavior of flexible piles and an optimal padeye depth was recommended.…”

Section: Introductionmentioning

confidence: 99%

Failure Mode and Pullout Capacity of Anchor Piles in Clay

Zhao¹,

Liu²,

Liu³

2017

American Journal of Engineering and Applied Sciences

View full text Add to dashboard Cite

Anchor piles are wildly adopted in mooring systems. However, there are still challenges in predicting the failure mode and pullout capacity of the pile. Previous Finite Element (FE) analysis was all based on the traditional small strain FE analysis. The whole pullout process of the pile cannot be simulated. Hence, the failure mode of the pile is hard to be understood, especially under small loading angles to the horizontal. In addition, theoretical analysis received limited attention in analyzing the failure mode and pullout capacity of anchor piles under inclined loading. In the present work, both Large Deformation Finite Element (LDFE) and theoretical analyses are performed to investigate the failure mode and pullout capacity of anchor piles. The effectiveness of the LDFE analysis is at first verified by model test data. Then, a theoretical method is proposed to predict the Optimal Loading Point (OLP), failure mode and pullout capacity of the pile under inclined loading. Comparative study is also performed between LDFE and theoretical analyses. It is concluded: (1) the proposed theoretical method is effective in predicting the OLP, failure mode and pullout capacity of anchor piles; (2) the OLP is not affected by the length-to-diameter ratio and the failure direction of β>5°, while very sensitive to the soil strength and the loading angle; (3) there is a critical loading angle, below which the pile will be pulled out vertically; and (4) the lateral capacity at the OLP could be more than twice that at the top of the pile.

show abstract

Industry Trends for Design of Anchoring Systems for Deepwater Offshore Structures

Cited by 11 publications

References 17 publications

Coupled Dynamic Modeling of Floating Wind Turbine Systems

Coupled Dynamic Modeling of Floating Wind Turbine Systems

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

Failure Mode and Pullout Capacity of Anchor Piles in Clay

Contact Info

Product

Resources

About