风电机组结构动力响应研究

The research on structural dynamic response of wind turbine

针对风电机组动力响应引起的稳定性问题,文章研究了不同风速下的叶片与塔架一体化风力机数值响应情况。基于SolidWorks建立风力机三维结构模型,提取叶根和叶尖质点,利用有限元分析法,分析不同风速变化情况下的应力及位移变化趋势。对风力机摆振方向与挥舞方向的风速衰减进行研究,探讨了叶片表面附近流场剪应力分布。结果表明:在不同风速下,叶尖、叶根应力及位移变化呈现一定的规律性;在自然风经过风力机时,风能被有效捕获,进而呈现规律性衰减。研究结果为风力机运行动力学提供了参考。

In response to stability issues caused by the dynamic response of wind turbines,in order to study the numerical response of the wind turbine under different wind speeds,a threedimensional structural model of the wind turbine is established based on SolidWorks,the blade root and tip particles are extracted,and the stress and displacement trends under different wind speeds are analyzed by using the finite element analysis method.The wind speed attenuation in the pendulum direction and the brandishing direction of the wind turbine is studied and the shear stress distribution of the flow field near the blade surface is discussed.The results show that the stress and displacement of blade tip and blade root have certain regularity under different wind speeds.When the natural wind passes through the wind turbine,the wind energy is effectively captured,and then shows regular attenuation.This study provides reference value for the dynamic parameters of wind turbine operation and improves the stability of wind turbine operation.