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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架耦合的全非线性有限元模型。利用该模型对涡轮机的实测固有频率进行了预测，塔架最大弯矩的预测值与实测值吻合较好，提出了基于阵风荷载因子和折减系数的考虑动力效应的等效静风荷载估算公式，用于估算复杂地形下涡轮机的风荷载。基于非高斯假设，推导了一个阵风荷载因子，用于估计风荷载的非线性，特别是在高湍流强度下。所提出的方法预测的风响应显示出良好的协议与全动力模拟。建立了风电涡轮机支撑结构在停机和运行工况下的抗震设计半理论公式，该公式与数值模拟结果吻合较好，计算结果比传统模型更精确，相关结果已发表在Proc. of Computational Wind Engineering 2006，Proc. of 12th International Conference on Wind Engineering，Proc. of European Wind Energy Conference 2008，2007年日本土木工程学会出版的《风力涡轮机支撑结构和基础设计指南》中采用了第19届全国风力工程研讨会论文集、第28届、第29届风能利用研讨会论文集、涡轮机械。