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A study of wind and seismic response analysis of wind turbine and its verification by a field test

风力发电机组风震响应分析及现场试验验证研究

基本信息

批准号：
18360212
负责人：
ISHIHARA Takeshi
金额：
$ 10.75万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18360212/
关键词：
Wind turbine A full nonlinear FEM model Wind load Seismic load Geometric nonlinearity Coupling between the rotor and the tower Complex terrain Gust loading factor 地震応答予測地震波空力減衰風力発電設備風応答解析現地観測加速度応答歪み計測固有振動数構造減数の同定

项目摘要

A full nonlinear FEM model was developed, which takes into account the geometric nonlinearity and the coupling between the rotor and the tower. The observed natural frequencies of the wind turbine were predicted successfully using the developed model and the predicted maximum of tower bending moments by the model show a good agreement with the measurements.Equivalent static wind load evaluation formulas considering the dynamic effects based on gust loading factors and the reduction coefficients were proposed to estimate the wind load on the wind turbine in complex terrain. A gust loading factor based on a non-Gaussian assumption is derived to estimate the nonlinearity of wind loads, especially in the high turbulence intensity. The predicted wind responses by proposed methods showed favorable agreements with those by a full dynamic simulation. Semi-theoretical formulas for seismic design of wind turbine support structures in the parked and operating conditions were established, which agreed with the numerical simulation and showed more accurate results than conventional models.These results were reported in Proc. of Computational Wind Engineering 2006, Proc. of 12th International Conference on Wind Engineering, Proc. of European Wind Energy Conference 2008, Proc. of 19th National Symposium on Wind Engineering, Proc. of 28th, 29th Symposium on Utilization of Wind Energy, Turbomachinery and were adopted in the Guidelines for design of wind turbine support structures and foundations published by Japan Society of Civil Engineers in 2007.

建立了考虑几何非线性和转子与塔间耦合的全非线性有限元模型。利用所建立的模型成功地预测了风力机的观测固有频率，所预测的塔架弯矩最大值与实测结果吻合较好。提出了考虑阵风荷载因子和折减系数动态效应的等效静态风荷载评价公式，用于复杂地形条件下风力机的风荷载估计。推导了基于非高斯假设的阵风荷载系数，以估计风荷载的非线性，特别是在高湍流强度下。所提方法预测的风响应与全动力模拟结果吻合较好。建立了风电机组停放工况和运行工况下支撑结构抗震设计的半理论计算公式，与数值模拟结果吻合，结果比常规模型更为准确。研究结果发表于2006年《计算风工程学报》、第12届国际风工程学术会议、2008年欧洲风能学术会议、第19届全国风工程学术会议、第28届、第29届风能利用、涡轮机械学术会议论文集，并被日本土木工程师学会2007年出版的《风机支撑结构和基础设计指南》所采用。