Dynamic Analysis of a Truss Spar-Type Floating Foundation for 5 MW Vertical-Axis Wind Turbine
Dynamic Analysis of a Truss Spar-Type Floating Foundation for 5 MW Vertical-Axis Wind Turbine
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DOI：
10.1115/1.4037292
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发表时间：
2017-12
影响因子：
1.6
通讯作者：
Li-qin Liu;Weichen Jin;Yingge Guo
中科院分区：
文献类型：
--
作者：
Li-qin Liu;Weichen Jin;Yingge Guo
本文研究了用于海上垂直轴风力机（VAWT）的桁架梁式浮动基础的动力特性。分析了基础结构参数变化对其运动的影响。结果表明，浮箱半径、上机械箱半径、重心与浮力中心间距、上机械箱高度对基础的升沉和俯仰运动有重要影响。选择了两组基础参数（FS-1和FS-2）来支持5mw的Darrieus风力发电机。分析比较了S-1 （FS-1支持的VAWT）和S-2 （FS-2支持的VAWT）两种浮动VAWT的运动性能。结果表明，浮式水轮机的垂荡运动和俯仰运动的幅值与波浪荷载有关；垂摇和俯仰运动的平均值取决于气动载荷。漂浮式VAWT S-2具有较好的运动性能；它的起伏和俯仰运动都很小。浮式VAWT的升沉频率与波浪频率相等。对于俯仰频率，在LC1到LC4的情况下存在转子旋转频率（0.175 Hz）分量，而每转两次（2P）响应的幅值远小于波响应的幅值。
This paper studies the dynamic characteristic of the truss Spar-type floating foundation used to support the offshore vertical-axis wind turbine (VAWT). The effects of changes in foundation structural parameters on its motions were evaluated. The results show that radius of the buoyancy tank, radius of the upper mechanical tank, interval of the center of gravity and center of buoyancy, and height of the upper mechanical tank have important effects on the heave and pitch motions of the foundation. Two sets of foundation parameters (FS-1 and FS-2) were selected to support the 5 MW Darrieus wind turbine. The motion performances of the two floating VAWTs, S-1 (the VAWT supported by FS-1) and S-2 (the VAWT supported by FS-2), were analyzed and compared. It was observed that the amplitudes of the heave and pitch motions of the floating VAWT depend on the wave loads; the mean values of the heave and pitch motions depend on the aerodynamic loads. The floating VAWT S-2 had better motion performance; its heave and pitch motions were all small. The heave frequencies of the floating VAWT were equal to the wave frequencies. For the pitch frequencies, there is a component of the rotor rotational frequency (0.175 Hz) for cases LC1 to LC4, while the amplitudes of the twice-per-revolution (2P) response are far smaller than the amplitudes of the wave response.