Motions and loads on dynamic export cables for floating Offshore Renewable Energy farms using physical and numerical modelling.

使用物理和数值建模研究浮动海上可再生能源发电场动态输出电缆上的运动和负载。

• 批准号: 2612190
• 金额: --
• 依托单位: Plymouth University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2612190
• 关键词: Motions; loads; dynamic; export; cables

A common feature of all Offshore Renewable Energy (ORE) systems is the need for energy extracted from either wind, waves or currents to be transmit to shore via cables. At present, existing cabling designs are generally inherited from fixed onshore/offshore wind or the offshore oil and gas sectors, and there is uncertainty in their effectiveness for floating ORE farms. One key challenge is understanding the motions and corresponding loads that cables are exposed to, and how these are dependent on the state of the cable under different scenarios. Seabed conditions, device motions and method of connection to the floating devices are all expected to influence these loads. Cable failures occur primarily due to either or both extreme loads and fatigue damage This PhD scholarship aims to utilise and develop physical and numerical modelling tools to characterise the behaviour of cables that are in suspension between two points, and hence help to minimise the likelihood of failure of these component. We will focus on two scenarios; suspension over varying seabed topology and suspension between two interconnected devices. The PhD objectives are to: Establish protocols for, and carry out, scale model testing of cable response within the COAST laboratory. Adapt existing numerical models to simulate the hydrodynamic forces and motions in the two cable scenarios. This will include use and development of existing mooring line models and/or fully non-linear OpenFOAM simulations. Apply material modelling methods to model cable damage from both extreme loads and fatigue resulting from the modelled motions.

所有海上可再生能源 (ORE) 系统的一个共同特点是需要从风、波浪或水流中提取能量并通过电缆传输到岸上。目前，现有的布线设计一般继承自固定式陆上/海上风电或海上油气领域，其对于浮式矿场的有效性存在不确定性。一项关键挑战是了解电缆所承受的运动和相应的负载，以及它们如何依赖于不同场景下电缆的状态。海底条件、设备运动以及与浮动设备的连接方法都预计会影响这些负载。电缆故障主要是由于极端负载和疲劳损坏之一或两者造成的。该博士奖学金旨在利用和开发物理和数值建模工具来表征两点之间悬挂电缆的行为，从而有助于最大限度地减少故障的可能性这些组件。我们将重点关注两种情况；不同海底拓扑结构上的悬浮以及两个互连设备之间的悬浮。博士生的目标是： 在 COAST 实验室内建立电缆响应比例模型测试协议并进行测试。采用现有数值模型来模拟两种电缆场景中的水动力和运动。这将包括使用和开发现有系泊线模型和/或完全非线性 OpenFOAM 模拟。 应用材料建模方法对极端负载和建模运动产生的疲劳造成的电缆损坏进行建模。