中浅水深漂浮式风机系泊系统失效影响数值研究  

Numerical investigation on the effects of the mooring system failure for floating wind turbines in intermediate and shallow water depths

作　　者：李雅丽[1] 高洋洋 王立忠[1,2] LI Yali;GAO Yangyang;WANG Lizhong(Ocean College,Zhejiang University,Zhoushan 316021,China;Hainan Institute of Zhejiang University,Sanya 572025,China)

机构地区：[1]浙江大学海洋学院,浙江舟山316021 [2]浙江大学海南研究院,海南三亚572025

出　　处：《海洋工程》2025年第1期101-115,共15页The Ocean Engineering

基　　金：国家重点研发计划项目(2023YFB4203303);国家自然科学基金重点项目(51939010);浙江省重点研发计划项目(2023C01008)。

摘　　要：基于FAST-OrcaFlex风机时域一体化计算模型,开展中浅水深15 MW半潜漂浮式风机系泊系统连续失效数值模拟研究,分析正常发电和停机工况下系泊系统失效过程对漂浮式风机动力响应特性的影响规律。研究结果表明:在水深h=50 m,有效波高Hs=8.30 m,谱峰周期Tp=12.05 s,湍流风平均风速为16 m/s时,当与风浪同向单根锚链在导缆孔处破断时,同向剩余两根锚链在导缆孔处张力会显著增大,风机基础不会发生较大偏移;当多根锚链在导缆孔处连续破断时,半潜式基础纵荡和横荡平均漂移距离最大可达152.64和6.72 m,导致剩余锚链悬空段减小,导缆孔张力降低;海流的作用显著增大系泊系统破断后漂浮式风机的漂移距离;极端停机工况下,半潜式基础纵荡和横荡平均漂移距离最大可达452.46和2.13 m。此外,动态海缆在漂浮式风机产生较大偏移后,弯曲曲率会超过其限值,极易发生破断失效,导致风机停机。Based on the FAST-OrcaFlex time-domain integrated simulation model,a numerical study on the continuous failure of the mooring system of a 15 MW semi-submersible floating wind turbine in intermediate and shallow water depths was conducted.The study analyzed the impact of mooring system failure on the dynamic response characteristics of the floating wind turbine under normal power generation and shutdown conditions.Results show that at a water depth of h=50 m,significant wave height Hs=8.30 m,spectral peak period Tp=12.05 s,and turbulent wind average velocity of 16 m/s,when a single mooring chain in the direction of wind and waves breaks at the fairlead,the tension in the remaining two mooring chains increases significantly without causing significant displacement of the turbine foundation.However,when multiple mooring chains consecutively break at the fairlead,the semi-submersible platform experiences a maximum surge and sway mean drift distance of up to 152.64 and 6.72 m,respectively,leading to a reduction in the suspended length of the remaining mooring chains and a decrease in fairlead tension.The presence of ocean currents significantly increases the drift distance of the floating wind turbine following mooring system failure.Under extreme shutdown conditions,the semisubmersible platform's maximum surge and sway mean drift distances reach 452.46 and 2.13 m,respectively.Additionally,after significant displacement of the floating wind turbine,the bending curvature of the dynamic cable exceeds its limit,making it highly susceptible to breakage failure,which could lead to turbine shutdown.

关 键 词：漂浮式风机 系泊系统破断 一体化分析 运动响应 系泊张力 动态海缆 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]