不同入射角风波流海上漂浮式风力机频域与时域动态特性

采用边界元并结合多体动力学方法分析了张力腿平台(TLP)漂浮式风力机结构,研究了平台结构在不同方向上的频域与时域运动响应变化,并比较了漂浮式平台在海洋环境条件下风波流联合作用时和波浪载荷独立作用时的运动响应,得到了平台结构在时域中的动力响应.研究结果表明:漂浮式平台在频域变化范围内,运动响应主要集中在低频部分,绕射力对漂浮式海上风力机TLP的作用力不能忽略;风波流联合作用时的运动响应标准差大于波浪载荷独立作用时的运动响应标准差,且平台偏离平衡位置的程度更加剧烈;平均运动响应及标准差在入射角分别为0°、22.5°和45°时相差微小.研究结果对海上张力腿平台结构设计与优化具有很高的参考价值.

Frequency and time domain dynamic characteristics of offshore wind turbine with different incidence angle

Based on the finite element method,combined with multi-body dynamics, offshore wind turbine tension leg platform is analyzed in frequency domain and time domain.The motion response of tension leg platform to wave is obtained in time domain,as well as that under the combined action of wind,wave and tide.The results show that in frequency domain,motion response is mainly in the low frequency range,and diffraction force for offshore wind turbine tension leg platform should not be ignored.When ocean environment load is small,the standard deviation of response to combined action of wind, wave and tide is greater than that to only wave,and the displacement of the platform is also more strenuous.The mean value and standard deviation of motion response is nearly the same with an incident angle of 0°,22.5°and 45°.The results have high reference value on offshore tension leg platform structural design and optimization.