防灾减灾工程学报2025，Vol.45Issue(4)：745-753,795,10.DOI:10.13409/j.cnki.jdpme.20240404003
大直径单桩海上风机的风浪效应动力模型试验
Dynamic Model Testing of Wind and Wave Effects on Offshore Wind Turbines with Large-diameter Monopile Foundations
摘要
Abstract
The dynamic response of offshore wind turbines is significant under extreme wind and wave loading,posing a serious threat to their safety.Taking the NREL-5MW wind turbine as a prototype,a series of 1g dynamic model tests were conducted to study the behavior of an offshore wind turbine with a large-diameter monopile foundation in sand under extreme loading conditions.To replicate the random and irregular characteristics of environmental loading under actual marine conditions,a self-de-veloped linear motor exciter was employed to apply single-point loading using customized input nor-malized waveforms.The displacement and stress response characteristics of the wind turbine system were then comparatively analyzed under wind-only,wave-only,and combined wind-wave loading.Furthermore,the influence of different loading conditions on fatigue damage at the connection joint be-tween the superstructure and the monopile foundation of the wind turbine was investigated.The test results showed that under extreme wind-wave loading,the displacement and oscillation amplitude of the wind turbine exhibited significant nonlinear growth with increasing loading.Wave loading was the primary factor contributing to fatigue damage at the connection joint of the wind turbine structure.Ad-ditionally,the linear superposition of the extreme displacements under separate wind and wave loading was significantly larger than the coupled dynamic response under combined wind-wave loading.Con-versely,the linear superposition of fatigue damage at the connection joint under separate wind and wave loading was significantly lower than that under combined wind-wave loading.These findings pro-vide valuable reference for the design and evaluation of offshore wind turbines,demonstrating signifi-cant engineering applicability.关键词
1g模型试验/海上风机/大直径单桩基础/风浪联合荷载/疲劳分析Key words
1g model test/offshore wind turbine/large-diameter monopile foundation/combined wind-wave loading/fatigue analysis分类
建筑与水利引用本文复制引用
田抒平,张陈蓉,陈敬森..大直径单桩海上风机的风浪效应动力模型试验[J].防灾减灾工程学报,2025,45(4):745-753,795,10.基金项目
国家自然科学基金项目(51779175)资助 （51779175）
