关键词: 风力机叶片, 参数化建模, 极限工况, BLADED, 固有频率, 静力分析

Abstract: In view of the existing 850kW wind turbine blade， the material， structure and layer condition were analyzed， compared to the traditional blade finite element model. The chord length and twist which mainly described the structure of blade were expressed by using piecewise function expression form， and the parameterized geometric model of wind turbine blade was found through MATLAB and ANSYS to accomplished secondary development. The ultimate load of every section was solved by BALDED which basing on blade element momentum theory， and the increasing load was applied on the every part of blade. The first three waves and shimmy frequencies and the first torsion frequency were obtained through dynamic analysis， which comparing with the measured natural frequencies. The blade working outside the resonance region was proved. The distances of wave and stress distribution of key parts were received by static force analysis， and the wing surface was strength checked through maximum stress criteria and Tsai-Wu criteria(other parts in the same way). It showed that the blade could keep operate safely under limit state. The research describes the main mechanics performances of blade， and it lays the foundation for the blade to be optimized further.

Key words: wind turbine blade, parameterization, limiting condition, BLADED, natural frequency, static force analysis