GOALI/Collaborative Research: Novel and Efficient Seabed Ring Anchor for Omnidirectional Loading

GOALI/合作研究：用于全向加载的新型高效海底环锚

• 批准号: 1936901
• 负责人: Charles Aubeny
• 金额: $ 27.15万
• 依托单位: Texas A&M Engineering Experiment Station
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-03-15 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1936901&HistoricalAwards=false
• 关键词: GOALI; Collaborative; Research; Novel; Efficient

This Grant Opportunities for Academic Liaison with Industry (GOALI) project will support a research team to develop models for the loading placed on multiline ring anchors subjected to wind, waves and other forces. A Multiline Ring Anchor (MRA) is a ring-shaped anchor designed to be deeply embedded in offshore soils for the purposes of anchoring multiple floating platforms. The increase in offshore development in the wind energy, wave energy and aquaculture sectors requires multiple closely spaced nominally identical platforms that need this type of omni-directional anchor. This novel configuration differs substantially from the typical oil and gas installation and allows consideration of sharing anchors among multiple platforms, thereby driving down capital, material, fabrication and installation costs and duration significantly. Previous simulation-based research conducted by the research team has shown that this concept is feasible but that truly leveraging the advantages of multiline anchoring will require novel anchor designs that can be installed quickly and inexpensively and that also deliver omni-directional capacity and resistance to cyclic loading. To achieve this, the research team will develop models for the loading placed on the anchors from wind, waves and other forces; perform reduced-scale centrifuge tests to provide data on the behavior of MRA systems under these loads; and develop numerical models to assess the behavior of the anchors under multiple loading scenarios. This research project includes a collaboration with an industrial partner, Vryhof Anchors, to ensure that results are driven by the needs of industry and can move rapidly to further industry-driven technology development.In order to demonstrate proof-of-concept for the MRA, a series of research tasks are planned that will quantify stochastic and time-varying loads placed on the anchor by wind, wave and aquaculture platforms. Additionally, the team will develop conceptual MRA designs based on finite element and plastic limit analysis and assess the suitability of the MRA for sand and clay conditions by a range of methods including centrifuge testing. These tasks will enable the development of fundamental understanding of the response of embedded anchors to cyclic and directionally varying loading. The team will deliver a system evaluation for realistic installations that will provide the impetus for further demonstration-scale research into the MRA. Fundamental advances in understanding the dynamics of interconnected offshore systems as well as the response of deeply embedded anchors in different types of soil to complex loading form the core of the intellectual merit.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这个学术界与工业界联络的赠款机会（GOALI）项目将支持一个研究小组开发多线环锚承受风、波浪和其他力的载荷模型。多线环锚（MRA）是一种环形锚，设计用于深埋在海上土壤中，用于锚定多个浮式平台。风能、波浪能和水产养殖领域的海上开发的增加需要多个紧密间隔的名义上相同的平台，这些平台需要这种类型的全向锚。这种新颖的配置与典型的石油和天然气设施有很大不同，并且允许考虑在多个平台之间共享锚，从而显著降低资本、材料、制造和安装成本以及持续时间。该研究团队之前进行的基于模拟的研究表明，这一概念是可行的，但真正利用多线锚固的优势将需要新型锚设计，这些设计可以快速，廉价地安装，并且还可以提供全方位的能力和对循环载荷的抵抗力。为了实现这一目标，研究小组将开发用于风力，波浪和其他力施加在锚上的负载模型;进行缩小规模的离心试验，以提供有关MRA系统在这些负载下的行为的数据;并开发数值模型来评估锚在多种负载情况下的行为。该研究项目包括与工业合作伙伴Vryhof Anchor的合作，以确保结果由行业需求驱动，并能够快速推进行业驱动的技术开发。为了证明MRA的概念验证，计划进行一系列研究任务，以量化风，波浪和水产养殖平台施加在锚上的随机和随时间变化的负载。此外，该团队还将根据有限元和塑性极限分析开发概念性MRA设计，并通过包括离心试验在内的一系列方法评估MRA对砂和粘土条件的适用性。这些任务将使发展的基本理解的响应嵌入式锚循环和方向变化的负载。该团队将为实际安装提供系统评估，这将为MRA的进一步演示规模研究提供动力。在理解相互连接的海上系统的动力学以及不同类型土壤中的深埋锚对复杂载荷的响应方面取得了根本性的进步，这是知识价值的核心。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Lateral Undrained Capacity of a Multiline Ring Anchor in Clay

• DOI: 10.1061/(asce)gm.1943-5622.0001995
• 发表时间: 2021-05
• 期刊: International Journal of Geomechanics
• 影响因子: 3.7
• 作者: Junho Lee;C. Aubeny

Uplift resistance of a multiline ring anchor system in soft clay to extreme conditions

软粘土中多线环锚固系统在极端条件下的抗拔力

• 发表时间: 2021
• 期刊: GSP 328
• 作者: Lee, J.;Hong, J;Aubeny, C.;Arwade, S.;DeGroot, D.;Martinez, A.;Beemer, R.
• 通讯作者: Beemer, R.

Installability of a multiline ring anchor system in soft clay under extreme conditions

极端条件下软粘土中多线环锚固系统的可安装性

• 发表时间: 2021
• 期刊: Proceedings Ocean 21
• 作者: Lee, J.;Hong, J.;Aubeny, C.;Arwade, S.;DeGroot, D.;Martinez, A.;Beemer, R.;Balakrishnan, K.;Nam, Y.
• 通讯作者: Nam, Y.

Effect of Keying Flaps on a Multiline Ring Anchor in Soft Clay

键控翼片对软粘土中多线环锚的影响

• 发表时间: 2021
• 期刊: International Foundations Congress and Equipment Expo 2021
• 作者: Lee, J;Aubeny, C.
• 通讯作者: Aubeny, C.

Uplift capacity of suction caissons in sand for general conditions of drainage

一般排水条件下砂土吸力沉箱的提升能力

• 发表时间: 2021
• 期刊: and Arctic Engineering
• 作者: Gogoi, R.;Aubeny, C.;Watson, P.;Bransby, F.
• 通讯作者: Bransby, F.