Hi'/> Bi-directional vibration control of offshore wind turbines using a 3D pendulum tuned mass damper
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Bi-directional vibration control of offshore wind turbines using a 3D pendulum tuned mass damper

机译：使用3D摆调谐质量阻尼器的海上风力涡轮机双向振动控制

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Highlights•An analytical model of an offshore wind turbine with a three dimensional pendulum tuned mass damper has been established.•The optimum design formula of the three dimensional pendulum tuned mass damper is proposed.•The pendulum damper outperforms dual linear tuned mass dampers in mitigating the bi-directional vibration of the nacelle.AbstractOffshore wind turbines suffer from excessive bi-directional vibrations due to wind-wave misalignment and vortex induced vibrations. However, most of existing research focus on unidirectional vibration attenuation which is inadequate for real applications. The present paper proposes a three dimensional pendulum tuned mass damper (3d-PTMD) to mitigate the tower and nacelle dynamic response in the fore-aft and side-side directions. An analytical model of the wind turbine coupled with the 3d-PTMD is established wherein the interaction between the blades, the tower and the 3d-PTMD is modeled. Aerodynamic loading is computed using the Blade Element Momentum method where the Prandtls tip loss factor and the Glauert correction are considered. JONSWAP spectrum is adopted to generate wave data. Wave loading is computed using Morisons equation in collaboration with the strip theory. Via a numerical search approach, the design formula of the 3d-PTMD is obtained and examined on a National Renewable Energy Lab (NREL) monopile 5 MW baseline wind turbine model under misaligned wind, wave and seismic loading. Dual linear tuned mass dampers (TMDs) deployed in the fore-aft and side-side directions are utilized for comparison. It is found that the 3d-PTMD with a mass ratio of2%can improve the mitigation of the root mean square and peak response by around10%when compared with the dual linear TMDs in controlling the bi-directional vibration of the offshore wind turbines under misaligned wind, wave and seismic loading.
机译： 突出显示 • 已建立具有三维摆质量阻尼器的海上风力发电机的解析模型。 < / ce：list-item> • 最佳设计公式 • < ce：para id =“ p0440” view =“ all”>在减轻机舱的双向振动方面，摆锤的性能优于双线性调谐质量阻尼器。 摘要 由于风波未对准和涡旋，海上风力涡轮机遭受了过多的双向振动引起的振动。然而，大多数现有研究集中在单向振动衰减上，这对于实际应用是不够的。本文提出了一种三维摆式质量阻尼器（3d-PTMD），以减轻塔架和机舱在前后方向和侧面方向上的动力响应。建立了与3d-PTMD耦合的风力涡轮机的分析模型，其中对叶片，塔架和3d-PTMD之间的相互作用进行了建模。使用叶片要素动量法计算空气动力学载荷，其中考虑了Prandtls尖端损失因子和Glauert校正。采用JONSWAP频谱生成波数据。波浪载荷是使用Morisons方程与带状理论共同计算的。通过数值搜索的方法，获得了3d-PTMD的设计公式，并在国家可再生能源实验室（NREL）单桩5 MW基准风力涡轮机模型中研究了风，浪和地震荷载未对准的情况。在前后方向和侧面方向上使用的双线性调谐质量阻尼器（TMD）用于比较。发现质量比为 2 ％ 可以改善大约 10 ％ 线性TMD用于控制风，浪和地震载荷未对准的情况下海上风力涡轮机的双向振动。

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