海冰作用下锥体结构对近海桩柱式风力机结构动态响应影响

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (22) : 225-230.

论文

许子非，叶柯华，李春，丁勤卫，杨阳

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Influences of the cone structure of a monopile offshore wind turbine on its dynamic responses under ice loading condition

XU Zifei, YE Kehua, LI Chun, DING Qinwei, YANG Yang

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文章历史 +

摘要

基础结构的稳定是海上风力机安全运行的根本保障，以NREL 5 MW风力机为研究对象，基于Ralston理论建立海冰载荷，同时并考虑湍流风作用，研究安装不同锥角的锥体结构风力机结构动态响应并与未安装锥体结构的风力机进行对比，结果表明，锥体结构能有效降低海冰载荷，减小塔顶加速度及塔顶位移。当锥体角度由70°减小至40°时，海冰载荷减小83.8%，塔顶平均加速度减小43.1%。较之于无锥体结构时，安装40°锥体结构使得塔架一阶固有频率与风轮一阶固有频率处的塔顶位移幅值减小45%与85%。

Abstract

The support structure stability is the fundamental guarantee for the operation safety of offshore wind turbines.A NREL 5 MW wind turbine was selected as the baseline turbine and the ice loads were estimated by using the Ralston theory and considering the turbulent wind.The dynamic behaviors of the wind turbine tower installed with a cone structure of different cone angle were inspected and compared with those of the baseline turbine.The results show that the cone structure has significant effect on the reducing of ice loads, tower top acceleration and displacement.The average ice load and tower top acceleration in the case of 40° cone angle will be respectively reduced by 83.8% and 43.1% when the cone angle changes to 70°.Comparing with the baseline turbine, the tower-top displacements at the first order natural frequencies of the tower and the wind wheel in the case of 40° cone angle are reduced by 45% and 80% respectively.

导出引用

许子非，叶柯华，李春，丁勤卫，杨阳. 海冰作用下锥体结构对近海桩柱式风力机结构动态响应影响[J]. 振动与冲击, 2018, 37(22): 225-230

XU Zifei, YE Kehua, LI Chun, DING Qinwei, YANG Yang. Influences of the cone structure of a monopile offshore wind turbine on its dynamic responses under ice loading condition[J]. Journal of Vibration and Shock, 2018, 37(22): 225-230

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