Abst'/> Drained monotonic and cyclic capacity of a dynamically installed plate anchor in sand
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Drained monotonic and cyclic capacity of a dynamically installed plate anchor in sand

机译：砂土中动态安装板锚的排水单调和循环能力

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AbstractThe emergence of commercial offshore floating renewable energy devices that are expected to be deployed in large integrated arrays in relatively shallow water requires anchor types that are suited to sandy seabeds. This paper considers centrifuge test data that quantify the capacity of a novel dynamically installed plate anchor in sand under drained monotonic and cyclic loading. The monotonic tests investigated the role of the eccentricity of the load attachment point from the plate, the mooring line load inclination at the seabed and the plate embedment depth, whereas the cyclic tests examined the capacity mobilisation due to both regular and irregular drained cyclic loading for a fixed embedment depth and seabed load inclination. The test data indicate that an optimal anchor design would employ a load attachment point that is eccentric from the plate by at least 0.6 times the plate height, and that the anchor provides higher capacity when the seabed load inclination is horizontal (catenary mooring) than when it is vertical (vertical taut mooring). The centrifuge data show that drained cyclic loading does not degrade anchor capacity, and may be beneficial provided the cyclic loading involves a history of lower level cyclic loading that densifies the sand.Highlights•A novel dynamically installed anchor concept is introduced for mooring offshore floating renewable energy devices in sand.•Drained monotonic and cyclic capacity of the anchor in sand is quantified via centrifuge tests.•Centrifuge tests reveal how the anchor design could be optimised by modifying the load attachment point.•The anchor is more efficient in sand when loaded through a catenary rather than a vertical mooring.•Low level drained cyclic loading may improve anchor capacity.
机译： 摘要 商业海上离岸浮动可再生能源设备的出现，预计将在相对较浅的水中以大型集成阵列部署，需要使用以下锚点类型：适用于沙质海底。本文考虑了离心力测试数据，该数据量化了在排水单调和循环载荷下沙子中新型动态安装板锚的承载能力。单调试验研究了来自板块的载荷附着点的偏心率，海床的系泊线载荷倾斜度和板块埋入深度的作用，而循环试验则研究了定期和不规则排水循环载荷引起的承载能力动员。固定的埋深和海底载荷倾斜度。测试数据表明，最佳锚固设计将采用偏离钢板至少0.6倍板高的载荷连接点，并且当海底载荷倾斜水平（三系系泊）时，锚固提供更高的承载能力。它是垂直的（垂直绷紧的系泊）。离心机数据表明，排水循环载荷不会降低锚固能力，如果循环载荷涉及低水平循环载荷的历史（使沙子致密），则可能是有益的。 重点 • 引入了一种新颖的动态安装锚具概念，用于将海上浮式可再生能源装置锚固在沙子中。 • 砂中锚的排水单调和循环能力通过离心机te定量 • 离心机测试揭示了如何通过修改载荷附着点来优化锚设计。 • 通过悬链线而不是垂直系泊索，锚固在沙子中的效率更高。 < / ce：list-item> • 低级别消耗循环加载可能会提高锚点承载能力。

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