A Numerical Prediction on the Transient Response of a Spar-Type Floating Offshore Wind Turbine in Freak Waves
A Numerical Prediction on the Transient Response of a Spar-Type Floating Offshore Wind Turbine in Freak Waves
复制标题
奇异波中翼梁式浮式海上风力发电机瞬态响应的数值预测
DOI：
10.1115/1.4047202
复制
发表时间：
2020-06
期刊：
影响因子：
--
通讯作者：
Yougang Tang
中科院分区：
文献类型：
--
作者：
Yan Li;Xiaoqi Qu;Liqin Liu;Peng Xie;Tianchang Yin;Yougang Tang
采用时域仿真方法研究了奇异波作用下海上漂浮式风力涡轮机（FOWT）的动力响应。为此，耦合的气-水-系泊内部的数值代码被采用来执行模拟。该方法包括用于模拟气动载荷的叶素动量（BEM）模型、用于模拟水动力载荷的非线性模型、Spar浮筒的非线性恢复模型和用于模拟系泊缆的非线性算法。以OC 3型Hywind Spar型FOWT为例，研究了其在畸形波条件下的动态响应，同时采用随机频率分量选择调相法生成畸形波的时间序列。在几种情况下，平台的运动，施加在系泊缆上的张力，和发电性能被记录。仿真结果表明，当畸形波作用于FOWT时，FOWT在各自由度上都将产生瞬态运动，产生的功率急剧下降。此外，还讨论了畸形波参数对FOWT运动的影响。
Simulations are conducted in time domain to investigate the dynamic response of a spar-type floating offshore wind turbine (FOWT) under the freak wave scenarios. Toward this end, a coupled aero-hydro-mooring in-house numerical code is adopted to perform the simulations. The methodology includes a blade-element-momentum (BEM) model for simulating the aerodynamic loads, a nonlinear model for simulating the hydrodynamic loads, a nonlinear restoring model of Spar buoy, and a nonlinear algorithm for simulating the mooring cables. The OC3 Hywind spar-type FOWT is adopted as an example to study the dynamic response under the freak wave conditions, meanwhile the time series of freak waves are generated using the random frequency components selection phase modulation method. The motion of platform, the tension applied on the mooring lines, and the power generation performance are documented in several cases. According to the simulations, it is indicated that when a freak wave acts on the FOWT, the transient motion of the FOWT is induced in all degrees-of-freedom, as well as the produced power decreases rapidly. Furthermore, the impact of freak wave parameters on the motion of FOWT is discussed.
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