可调节式格栅装置对漂浮式海上风机稳定性的影响

Influence of adjustable grille device on the stability of floating offshore wind turbine

为提高漂浮式风机在复杂海洋环境中的稳定性与安全性,提出一种可调节式格栅装置,开展振动台试验,验证格栅装置减震的可行性,并利用有限元数值分析,建立可调节式格栅装置与漂浮式风机的仿真模型,分析在不同波况下漂浮式风机的动力响应。研究结果表明:无可调节式格栅装置时,漂浮式风机结构在巨浪载荷下最大倾角为3.1°;当增加格栅装置后,在相同波浪荷载作用下,风机结构的晃动幅值与最大倾角均会减小,二者减小幅度与格栅板开启角度有关;同时,风机结构的自振频率增大,在格栅板开启角度为30°时,结构最大倾角与塔筒应力降幅最大,分别减小1.8°和108.89 MPa,由此可见可调节式格栅装置可显著提高漂浮式海上风机的稳定性与安全性。

In order to improve the stability and safety of the floating wind turbine in the complex marine environment,an adjustable grille device was proposed.The shaking table test was carried out to verify the feasibility of the grille device.The finite element numerical analysis was used to establish the simulation model of the adjustable grille device and the floating wind turbine,and the dynamic response of the floating wind turbine under different wave conditions was analyzed.The results show that when there is no adjustable grille device,the maximum inclination of the floating wind turbine structure under the heavy wave load is 3.1°.When the grille device is added,under the same wave load,the sloshing amplitude and maximum inclination of the floating wind turbine structure will decrease,and the reduced amplitude is related to the opening angle of the grille plate.At the same time,the natural frequency of the wind turbine structure increases.When the grille plate is opened at 30°,the maximum inclination angle of the structure and the stress of the tower cylinder are reduced by 1.8°and 108.89 MPa,respectively,which indicates that the adjustable grille device can significantly improve the stability and safety of the floating offshore wind turbine.