湍流风与地震联合作用下风力机塔架振动非线性特征研究

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Abstract 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.

Key words： wind Turbine tower earthquake dynamic response chaotic characteristics

Received: 23 August 2017 Published: 28 March 2219

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	Articles by authors
	ZOU Jinhua1
	YANG Yang1
	LI Chun1
	2
	LIU Zhongsheng1
	YUAN Quanyong1

Cite this article:

ZOU Jinhua1,YANG Yang1,LI Chun1, et al. Nonlinear characteristics of wind turbine tower vibration under turbulent wind and earthquake[J]. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(7): 57-64.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2019/V38/I7/57

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