Nonlinear characteristics of wind turbine tower vibration under turbulent wind and earthquake

被引：0
|
作者：
Zou J. [1 ]
Yang Y. [1 ]
Li C. [1 ,2 ]
Liu Z. [1 ]
Yuan Q. [1 ]
机构：
[1] School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai
[2] Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, Shanghai
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2019年 / 38卷 / 07期
关键词：
Chaotic characteristics; Dynamic response; Earthquake; Tower; Wind turbine;
D O I：
10.13465/j.cnki.jvs.2019.07.009
中图分类号：
学科分类号：
摘要：
To study nonlinear characteristics of a large-scale wind turbine tower's dynamic responses under turbulent wind and earthquake, a NREL 5 MW wind turbine was taken as the studying object. Based on the mode truncation method and the soil-structure interaction theory, the model of the wind turbine was established, and a seismic loading calculation module was developed to access the interface of the source-opened code FAST. 150 sets of different seismic accelerations achieved based on the standard seismic response spectra and turbulent wind acted on the wind turbine, its tower dynamic responses were calculated. The results show that earthquake action affects tower vibration accelerations greatly, turbulent wind has a great effect on the vibration at the tower's top in incoming flow direction; vibration energy due to earthquake is dissipated by aerodynamic damping, while the tower top lateral vibration energy is dissipated by structure damping; the tower top lateral vibration frequency mainly is the first order natural frequency of the wind turbine structure. Furthermore, based on the chaos theory, the phase-graph method and the max Lyapunov exponent method were used to analyze nonlinear characteristics of the tower top vibration displacement qualitatively and quantitatively. The results showed that 3D phase graphs of the tower top displacement time series under different working conditions have singularity and all their max Lyapunov exponents are larger than 0, so the tower top displacement response signals have chaotic characteristics. © 2019, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：57 / 64
页数：7
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