风机功率对半潜式风机运动性能的影响

Influence of Wind Turbine Power on Motion Performance of Semi-Submersible Wind Turbines

针对DTU 10 MW风机,设计一款新型无横撑半潜式风机基础,并通过调节基础压载使其分别搭载DTU 10 MW和NREL 5 MW两款风机。在此基础上,采用商业软件SESAM/SIMA分别建立气动-水动-伺服-弹性全耦合数值模型。针对正常作业和极端两种典型工况,对上述2款浮式风机系统的运动响应进行时域全耦合计算。根据计算结果开展不同风机功率对浮式风机系统整体运动性能的敏感性分析。研究表明:在正常作业工况下,由于风激励的影响,10 MW风机的运动响应比5 MW风机更大;在极端工况下5 MW风机纵摇固有周期更接近波浪周期,导致其纵摇运动比10 MW风机更大。

For the DTU 10 MW wind turbine,a new type of semi-submersible wind turbine foundation without transverse brace is designed,and by adjusting the basic ballast,the foundation is equipped with DTU 10 MW and NREL 5 MW wind turbines,respectively.On this basis,the commercial software SESAM/SIMA is used to establish a pneumatic-hydrodynamic-servo-elastic fully coupled numerical model.For the two typical working conditions of normal operation and extreme conditions,the time-domain fully coupled calculation of the motion responses of the above-mentioned turbines is carried out.Based on the calculation results,the sensitivity analysis of the overall motion performance of the floating wind turbines to different wind turbine powers is carried out.The research shows that:the motion response of the 10 MW wind turbine is larger than that of the 5 MW wind turbine under normal operation conditions due to the influence of wind excitation;under extreme conditions,the natural period of the pitch of the 5 MW wind turbine is closer to the wave period,resulting in a larger pitch motion than that of the 10 MW wind turbine.