Typhoon-resistance Analysis of Wind Turbines with Different Towers Based on Time-domain Method

LIU Xinxi, DENG Zongwei, GAO Qianfeng

Abstract

   In order to investigate the typhoon-resistance of wind turbines with different towers, four wind turbine integration models with different forms of towers were built by Abaqus finite element software and Autoregressive (AR) model was used to simulate the fluctuating wind for modal analyses and typhoon time-history analyses. The results show that the natural frequencies of wind turbines are greatly affected by wind rotor and nacelle. When the typhoon wind speed increases, the maximum along-wind displacement of the steel conical-cylindrical tower climbs linearly, while those of the other 3 towers show a significant nonlinear growth. As a lightweight flexible structure, the steel tube lattice tower exhibits the greatest dynamic response, and the steel conical-cylindrical tower exhibits the second one. Because of the considerable stiffness and weight, the displacement response of the reinforced concrete conical-cylindrical tower is the minimum, and the typhoon-resistance capability is the best.

 

 

Keywords: wind turbine tower,  time-domain analysis,  fluctuating wind simulation,  typhoon load,  dynamic response


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