为探明系泊系统对OC-4 DeepCwind风力机平台的约束能力,对风浪联合作用下的OC-4风力机系统运动响应开展模拟研究,重点探讨不同重块、浮块以及中段缆线设置对平台动力响应及系泊荷载的影响。以原悬链线式系泊作为参照,通过FAST和AQWA的风-浪-弹性耦合框架（F2A）计算,对比分析各影响因素在风力机系统中的作用。研究结果表明,系泊系统中配置重块能降低平台低频响应,进而有效抑制多个方向的平台运动幅度;在系泊系统中添加浮块虽对部分方向的平台运动及系泊荷载有所缓解,但也会引起剩余方向的运动幅值及系泊荷载显著增大;通过合理设置重块与浮块协同作用能同时抑制平台低频响应和高频共振现象。
Abstract
To assess the restraint capabilities of the mooring system on the OC-4 DeepCwind wind turbine platform, a simulation-based investigation was carried out to analyze the motion response of the OC-4 wind turbine system when subjected to the combined effects of wind and waves. The study focused on exploring the impact of various heavy blocks, floating blocks, and mid-section cable configurations on the platform's dynamic response and mooring loads. Using the original catenary mooring as a benchmark, the roles of different influencing factors within the wind turbine system were comparatively analyzed through calculations utilizing the FAST and AQWA's wind-wave-elastic coupling framework （F2A）. The findings reveal that incorporating heavy blocks into the mooring system can diminish the platform's low-frequency response, effectively curbing the amplitude of platform motion in multiple directions. Although adding floating blocks to the mooring system can mitigate platform motion and mooring loads in certain directions, it significantly increases the amplitude of motion and mooring loads in the remaining directions. By strategically coordinating the placement of heavy and floating blocks, it is possible to simultaneously mitigate the platform's low-frequency response and high-frequency resonance phenomenon.
关键词
海上风电 /
风力机 /
系泊缆 /
动力响应 /
系泊力 /
数值模拟 /
风浪耦合
Key words
offshore wind power /
wind turbines /
mooring cables /
dynamic response /
mooring force /
numerical simulation /
wind-wave coupling
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