基于有限元法的三维机织复合材料叶片振动特性分析

摘要

This article combines the ACP,CFX and modal modules to the finite element analysis of the 1.9 m 3D orthogonal woven composite wind turbine blade. Based on the analysis of the pressure contours and pressure curve,it is shown that the maximum wind pressure difference does not appear at the tip of straight blades. Through the dimensionless analysis we find the centrifugal force has the greatest influence on the vibration frequency of the blade.%文章耦合了ANSYS Workbench中的ACP,CFX和Modal模块,通过自定义User Material对1.9 m长的三维正交机织复合材料风机叶片进行了有限元分析.通过叶片正反面的压力云图和风压曲线分析了叶片表面的载荷特性,说明直叶片的最大风压差值并不出现在叶尖处.应用无量纲法对不同工况下叶片振动频率进行的分析可知,离心载荷对叶片的振动频率变化起到了决定性的作用.