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首页> 外文期刊>Journal of offshore mechanics and arctic engineering >Influence of Vortex-Induced Loads on the Motion of SPAR- Type Wind Turbine: A Coupled Aero-Hydro-Vortex-Mooring Investigation
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Influence of Vortex-Induced Loads on the Motion of SPAR- Type Wind Turbine: A Coupled Aero-Hydro-Vortex-Mooring Investigation

机译：涡流引起的载荷对SPAR型风力发电机运动的影响：航空水力涡流系泊研究

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摘要

The nonlinear coupling effect between degree-of-freedom (DOFs) and the influence of vortex-induced loads on the motion of SPAR-type floating offshore wind turbine (FOWT) are studied based on an aero-hydro-vortex-mooring coupled model. Both the first-and second-order wave loads are calculated based on the three-dimensional (3D) potential theory. The aerodynamic loads on the rotor are acquired with the blade element momentum (BEM) theory. The vortex-induced loads are simulated with computational fluid dynamics (CFD) approach. The mooring forces are solved by the catenary theory and the nonlinear stiffness provided by the SPAR buoy is also considered. The coupled model is set up and a numerical code is developed for calculating the dynamic response of a Hywind SPAR-type FOWT under the combined sea states of wind, wave, and current. It shows that the amplitudes of sway and roll are dominated by lift loads induced by vortex shedding, and the oscillations in roll reach the same level of pitch in some scenarios. The mean value of surge is changed under the drag loads, but the mean position in pitch, as well as the oscillations in surge and pitch, is little affected by the current. Due to the coupling effects, the heave motion is also influenced by vortex-induced forces. When vortex-shedding frequency is close to the natural frequency in roll, the motions are increased. Due to nonlinear stiffness, super-harmonic response occurs in heave, which may lead to internal resonance.
机译：基于气液涡旋系泊耦合模型，研究了自由度（DOF）与涡旋载荷对SPAR型浮式海上风力发电机（FOWT）运动的非线性耦合效应。一阶和二阶波浪荷载都是基于三维（3D）势能理论计算的。转子上的空气动力学负载是通过叶片单元动量（BEM）理论获得的。使用计算流体动力学（CFD）方法模拟涡流诱发的载荷。系泊力通过悬链理论解决，并且还考虑了SPAR浮标提供的非线性刚度。建立了耦合模型，并开发了用于计算风，浪和海组合海况下的Hywind SPAR型FOWT的动力响应的数字代码。结果表明，摇摆和侧倾的振幅主要由涡旋脱落引起的升力载荷支配，在某些情况下，侧倾的振动达到相同的俯仰水平。浪涌的平均值在拖曳载荷下会发生变化，但螺距的平均位置以及浪涌和螺距的波动几乎不受电流的影响。由于耦合效应，升沉运动也受到涡流感应力的影响。当涡流脱落频率接近侧倾固有频率时，运动会增加。由于非线性刚度，在升沉中会发生超谐响应，这可能导致内部共振。

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