风力机叶片三维建模与力学特性分析研究

Research on Three-Dimensional Modeling and Mechanical Analysis of Wind Turbine Blades

风力机叶片的三维建模与静力学和动力学分析是开展风力机叶片可靠性分析和优化设计的前提。通过给定翼型的二维离散坐标点来计算叶片上位置叶素所对应模型信息,结合三维建模和有限元分析软件,开展了入流风载荷作用下叶片的静强度、模态和谐响应分析,获得了叶片结构的最大应变、应力、典型振动模态和(0~120)Hz激励频率作用下变形量的频响峰值,为大中型风力机叶片(基于疲劳失效)的结构优化设计和可靠性分析提供重要参考。

Three-dimensional modeling,static analysis and dynamic analysis are the preconditions for reliability analysis and optimal design of wind turbine blades.The corresponding model information of the leaf element on the blade was calculated by the two-dimensional discrete coordinate points of the given airfoil. Then,three-dimensional modeling and finite element analysis software were used to analyze the static strength,modal and harmonic response of the blade under the incoming wind load. After that,in addition to obtaining the maximum strain,stress and typical vibration modes of the blade structure,the peak frequency response of the deformation under the excitation frequency of (0~120)Hz.The experimental results can provide an important reference for structural optimization design and reliability analysis of large and medium-sized wind turbine blades(based on fatigue failure).