地震作用下桁架式大型海上风力机瞬态动力学分析

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (22) : 175-182.

论文

闫阳天1，许子非1，李春1，邓允河2，王渊博1

作者信息 +

Transient dynamics analysis of a large-scale jacket offshore wind turbine under seismic loading

YAN Yangtian1,XU Zifei1,LI Chun1,DENG Yunhe2,WANG Yuanbo1

Author information +

文章历史 +

摘要

为研究地震载荷作用下桁架式大型海上风力机结构动力学响应，采用文克尔土-构耦合模型描述柔性土壤与桩基间的相互作用，以NREL 5 MW大型海上风力机为研究对象，分别建立其桁架式及单桩式结构有限元模型，并计算两种结构在额定风速正常运行及突发地震两种工况时的结构瞬态动力学响应。结果表明：在地震及湍流风作用下，相较于单桩式风力机，桁架式结构具有更好的抗风抗震性能，且塔顶位移响应较小，能够有效保护塔顶叶片、机舱等重要部件。地震发生时，桁架式风力机米塞斯等效应力幅值变化范围降低48.7%，平均值降低21.9%。研究还发现，现有桁架结构设计会出现局部应变能激增。

Abstract

In order to study the structural dynamic response of a jacket large-scale offshore wind turbine under seismic loading, the interaction between flexible soil and pile foundation was described by the Winkler soil-structure model.The NREL 5 MW large-scale offshore wind turbine was taken as a research object and studied by constructing a finite element model for the jacket and monopile structure, and the structural transient dynamic responses of two kinds of structures were calculated under two kinds of running conditions: normal operation with rated wind speed and earthquake.The results show that under the action of earthquake and turbulent wind, the jacket has better wind and seismic resistance than the monopile wind turbine, and the displacement at the top of the tower is smaller, which can effectively protect the blades and the nacelle.At the time of earthquake, the range of the Mises equivalent stress amplitude of the jacket wind turbine is reduced by 48.7%, and the average value is decreased by 21.9%.The study also finds that in the existing jacket design there will be a local strain energy surge.

导出引用

闫阳天1，许子非1，李春1，邓允河2，王渊博1. 地震作用下桁架式大型海上风力机瞬态动力学分析[J]. 振动与冲击, 2020, 39(22): 175-182

YAN Yangtian1,XU Zifei1,LI Chun1,DENG Yunhe2,WANG Yuanbo1. Transient dynamics analysis of a large-scale jacket offshore wind turbine under seismic loading[J]. Journal of Vibration and Shock, 2020, 39(22): 175-182

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