CAREER: Experimental Modeling of Tidal Current Turbine Foundations: An Integrated Research and Education Plan

职业：潮汐流涡轮机基础的实验模型：综合研究和教育计划

• 批准号: 1754874
• 负责人: Cassandra Rutherford
• 金额: $ 29.19万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-08-01 至 2021-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1754874&HistoricalAwards=false
• 关键词: CAREER; Experimental; Modeling; Tidal; Current

This Faculty Early Career Development (CAREER) Program grant will advance the understanding of the unique behavior of tidal current foundations and improve science and engineering education at the elementary and high school levels, while promoting increased diversity in the field of geotechnical engineering. The research will investigate efficient and reliable foundation systems for undersea tidal current turbines. The foundations must be designed to resist high lateral loads as well as vertical and horizontal cyclic loading from the oscillating turbine blades, allowing the turbines to effectively absorb and harness the tidal energy while attached to the seafloor. Decreasing the cost of the foundation system can be an important part of making tidal power a viable and economical source of electricity. The research tasks will be used to produce educational products such as learning modules, demonstrations, animations and videos that will be implemented in the courses taught by the researcher and in K-12 outreach programs. A renewable energy lesson will be created for the 4th grade students at Booker T. Washington STEM Academy and the Girls Adventures in Mathematics, Engineering, and Science (G.A.M.E.S) camp for high school girls.The research objective of this project is to evaluate suction caisson foundation systems for tidal current turbines by examining the foundation performance using both 1g bench-scale (in transparent soil and Kaolin) and centrifuge testing under combined cyclic loading. This research focuses on the cyclic nature of the vertical, horizontal and moment loading due to waves, the rotation of the tidal current turbine blades and the change in direction of the horizontal loading due to ebb and flow tides. Although there have been many studies on the use of suction caissons as anchors with diameters less than 10m (Length/Diameter = 3-5), few researchers have investigated using suction caissons as foundation elements in soft clays with intermediate aspect ratios of L/D = 1-3. In addition, the unique vertical cycling and semidiurnal or diurnal (12 or 24 hr) tidal cycling of the horizontal load has not been accounted for in previous designs of suction caisson foundations. The focus of the experimental testing is to investigate the foundation performance, failure modes, load-displacement response, yielding behavior, and cumulative displacements under cyclic loading. The research effort will result in: (i) high quality laboratory data; (ii) load-displacement curves, and (iii) failure envelopes/interactions diagrams, that will allow for the continued study of the utilization of tidal current turbines as a renewable energy source.

这项教师的早期职业发展（职业）计划赠款将促进对潮汐当前基金会独特行为的理解，并在小学和高中级别改善科学和工程教育，同时促进岩土工程领域的多样性增加。该研究将调查用于海底潮汐电流涡轮机的有效且可靠的基础系统。必须设计基础，以抵抗振荡的涡轮叶片的高横向载荷以及垂直和水平循环载荷，从而使涡轮机在附着在海底时有效地吸收并利用潮汐能。降低基础系统的成本可能是使潮汐力成为可行且经济的电力来源的重要组成部分。研究任务将用于生产教育产品，例如学习模块，演示，动画和视频，这些模块将在研究人员和K-12外展计划中教授的课程中实施。将为Booker T. Washington STEM Academy的四年级学生和女童冒险创建可再生能源课，并为高中女生的数学，工程和科学（G.A.M.E.S）营地（G.A.M.E.S）营地创建。结合循环载荷。这项研究着重于垂直，水平和力矩载荷的循环性质，由于波的旋转，潮汐涡轮机叶片的旋转以及由于退潮和流动潮汐而导致的水平载荷方向变化。尽管有许多关于使用吸力碳子作为直径小于10m（长度/直径= 3-5）的锚固的研究，但很少有研究人员研究了使用吸力碳酸盐作为L/d = 1-3的中间长宽比比率的软粘土中的基础元素。此外，在吸力Caisson基础的先前设计中，尚未考虑到水平载荷的独特垂直循环，半齐或昼夜（12或24小时）的潮汐循环。实验测试的重点是研究基础性能，故障模式，负载置换响应，屈服行为和循环负载下的累积位移。研究工作将导致：（i）高质量的实验室数据； （ii）负载置换曲线和（iii）故障包络/相互作用图，这将允许继续研究将潮汐电流涡轮机作为可再生能源的利用。