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

基本信息

批准号：
1936939
负责人：
Alejandro Martinez
金额：
$ 25.99万
依托单位：
University of California-Davis
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=1936939&HistoricalAwards=false
关键词：
GOALI Collaborative Research Novel Efficient

项目摘要

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.

这种与行业联络的赠款机会（Goali）项目将支持一个研究团队开发模型，以使受到风，波浪和其他力量的多行环锚定上。多行环锚（MRA）是一种环形锚，旨在将其深层嵌入在近海土壤中，以锚定多个浮动平台。风能，波动能量和水产养殖部门的海上发育增加需要多个需要这种类型的综合方向锚的较密切的平台。这种新颖的配置与典型的石油和天然气安装有很大不同，并允许在多个平台之间进行共享锚，从而降低了资本，材料，制造和安装成本以及持续时间。研究团队进行的基于仿真的研究表明，这个概念是可行的，但是真正利用多行锚的优势将需要新颖的锚定设计，这些设计可以快速，廉价地安装，并且还具有全面的方向能力和对环状负载的抵抗力。为了实现这一目标，研究团队将开发模型，以使风，波浪和其他力量的锚定在锚点上。执行缩小尺度离心测试，以提供有关这些负载下MRA系统行为的数据；并开发数值模型来评估在多个加载方案下锚的行为。该研究项目包括与工业合作伙伴Vryhof Anchors的合作，以确保结果受到行业需求的驱动，并可以迅速采取行动以进一步以行业驱动的技术开发。此外，该团队将根据有限元和塑料极限分析开发概念MRA设计，并通过包括离心机测试在内的一系列方法来评估MRA对沙子和粘土条件的适用性。这些任务将使对嵌入式锚对循环和方向变化的负载的反应的基本了解发展。该团队将对现实的设施进行系统评估，该评估将为MRA的进一步演示规模研究提供动力。理解相互联系的离岸系统的动态以及不同类型的土壤对复杂负荷的深层锚固的响应的基本进步构成了知识分子的核心。该奖项反映了NSF的法定任务，并被认为是通过基金会的知识分子和更广泛的影响来评估的支持。