风波联合作用下10 MW漂浮式风力机Triple Spar平台动态响应研究

Dynamic Responses of 10 MW Floating Wind Turbine Triple Spar Platform under Combined Action of Wind and Wave

以DTU 10 MW风力机为研究对象,基于Triple Spar平台建立漂浮式风力机整机模型,运用水动力学软件AQWA,通过辐射/绕射理论并结合有限元方法,实现风波联合作用下漂浮式风力机动态响应的求解,并分析其时频响应特性。结果表明:频域分析中,平台纵荡、垂荡和纵摇一阶波浪激振力及其峰值频率和RAO幅频特性曲线趋势及其峰值频率基本不受波浪入射角度改变影响;时域分析中,波浪载荷主要影响平台纵荡、垂荡及纵摇波频处的运动响应,风载荷则加剧了平台低频处的运动响应,引起了平台纵荡-垂荡耦合运动、纵荡-纵摇耦合运动以及和差频运动。

With the DTU 10 MW wind turbine as research object,the floating wind turbine model is built based on the Triple Spar platform.The hydrodynamic software AQWA is used to realize the response of floating wind turbine through the radiation/diffraction theory and finite element method and analyze its time-frequency response characteristics.The results show that in the frequency domain analysis,the trend of the first-order wave excitation force and its peak frequency and RAO amplitude-frequency characteristic curve and its peak frequency are not affected by the change of the wave incident angle.In the time domain analysis,the wave load mainly affects the motion response of the platform′s surge,heave and pitch in low frequency region.The wind load aggravates the motion response of the platform in the low frequency region,causing the platform to surge-heave coupling motion and surge-pitch coupled motion as well as differential frequency motion.