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

建立了完整的非线性有限元模型，该模型考虑了转子的几何非线性和转子与塔架之间的耦合。利用所建立的模型成功地预测了风力机的观测固有频率，预测的塔架弯矩最大值与实测值吻合较好。提出了考虑阵风荷载系数和折减系数的等效静力风荷载估算公式，用于复杂地形下风力机的风荷载估算。推导了基于非高斯假设的阵风荷载因子，以估计风荷载的非线性，特别是在高湍流强度下。用所提出的方法预测的风响应与完全动态模拟的结果吻合较好。建立了风力机支撑结构在停放状态和运行状态下抗震设计的半理论公式，与数值模拟结果吻合较好，比常规模型具有更高的精度。计算风工程，2006，Proc。第十二届国际风能工程大会，PROC。2008年欧洲风能大会，Proc.第19届全国风能工程学术研讨会，Proc.日本土木工程师学会于2007年出版了第28届第29届风能利用与涡轮机械研讨会，并采用了风力机支撑结构和基础的设计指南。

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.