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Research and development about the mechanisms of a single point mooring system for offshore wind turbines

机译：海上风机单点系泊系统机理的研究与开发

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摘要

A new type of floating wind turbine, in which the floater itself can rotate from the wind is proposed in this paper. A new single point mooring system is necessary for the development of this new wind turbine. In this paper, the single point mooring system, which includes component such as catenary chains, the slip ring for the electric cable and the control cable were researched. This work will examine two different configurations of the single point mooring system that we developed. One uses a thrust bearing at the connecting points between the mooring parts and the floater parts. The other one uses not only a thrust bearing, but also an aligning bearing. Weather vane tests about the offshore wind turbine with each mooring system were conducted in an ocean basin. After performing wind tests of both configurations of the single point mooring system, it was concluded that the latter one functioned superior to the former one. This work discusses and clarifies the reason based on a physics model which focuses on the relation between the restoring yaw moment caused by the mooring chains and the static friction moment due to the bearing unit. We also performed a wind test at a real sea and verified that the bearing unit with not only the thrust bearing but also the aligning bearing could function properly.
机译：本文提出了一种新型的浮式风力发电机，其中浮子本身可以随风旋转。新的单点系泊系统对于这种新型风力涡轮机的开发是必需的。本文研究了单点系泊系统，该系统包括悬链，电缆滑环和控制电缆等组件。这项工作将研究我们开发的单点系泊系统的两种不同配置。人们在系泊部件和浮动部件之间的连接点处使用推力轴承。另一种不仅使用推力轴承，还使用调心轴承。在海盆中对带有每个系泊系统的海上风力涡轮机进行风向标测试。在对单点系泊系统的两种配置进行风测试后，得出的结论是，后者的功能优于前者。这项工作基于物理模型讨论并弄清了原因，该物理模型着重于系泊链引起的恢复偏航力矩与轴承单元引起的静摩擦力矩之间的关系。我们还在真实的海上进行了风能测试，并验证了不仅带有推力轴承而且还有调心轴承的轴承单元都可以正常工作。

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