风力机复合材料叶片内部结构典型铺层及分析

叶片为风力发电装置中最核心、最关键的部件之一,其材料的选择对于叶片设计至关重要.大型风力机叶片普遍采用复合材料.将叶片视为一个变截面悬臂梁,基于经典层合板理论和梁帽式铺层方法,利用美国可再生能源国家实验室(NREL)发布的叶片结构分析软件PreComp和BModes计算叶片截面刚度、固有频率以及极限载荷作用下的变形.将计算值和ANSYS软件的分析结果进行比较,结果表明梁帽式铺层方法合理可行,且不影响叶片性能,在实际工程应用中有较大的使用价值.

The internal structural analysis of composite wind turbine blades with typical layup

The blade is the most important part of wind turbines and the selection of blade materials is vital for blade design.In this work, the blade of composite materials is considered as a variable cross section cantilever beam and an analysis is carried out based on the classical laminate theory and the spar-cap type layup method.The computer programs Precomp and Bmodes originally developed by NREL(National Renewable Energy Laboratory of USA) are applied to calculate the stiffness,the natural frequency and the deflections under limit load.A comparison of the calculation results with the result of ANSYS and the experimental data shows that the spar-cap type layup method is feasible.The blade structure still has enough stiffness to fulfill application purposes.It proves that these programs have great practical value for the engineering application to large wind turbine blades.