风电叶片的等效模型建立

Establishment of equivalent model of wind turbine blade

在风电叶片振动控制分析中,准确的等效模型是提升控制性能的关键因素。针对风电叶片结构复杂的特征,基于质量分布相近原则,将叶片简化成变截面悬臂梁,建立了叶片的等效模型。同时对叶片模型、简化模型和有限元仿真动力学模型进行了模态计算,结果表明:建立的等效模型可以替代叶片模型,为叶片的振动控制奠定了基础。

In the analysis of wind turbine blade vibration control,accurate equivalent model is the key factor to improve the control performance.Aiming at the complex structure of wind turbine blade,based on the principle of similar mass distribution,the blade is simplified into a variable cross-section cantilever beam,and the equivalent model of the blade is established.At the same time,the blade model,simplified model and the finite element simulation dynamic model are calculated.The results show that the established equivalent model can replace the blade model and lay a foundation for vibration control.