Jixie qiangdu (Feb 2025)
Carbon fiber and glass fiber mixed design and structural performance analysis for large wind turbine blade
Abstract
Carbon fiber is increasingly used to replace conventional glass fiber in layup designs of large wind turbine blades to improve their structural strength, but the high cost of carbon fibers makes it difficult to cover the entire area of the blade.Therefore，the research of the influence of mixing ratio and relative position of carbon fibers and glass fibers on the structural performance of the blade can help to obtain higher performance and lower cost wind turbine blades.The proportion of carbon fibers and glass fibers in the corresponding position of the main beam of the blade and the relative position of layup were adjusted by Ansys software.And the structural statics, modal and buckling analyses were conducted by using a combination of computational fluid dynamic method and finite element method.The results show that the performance of the blade main beam using carbon fibers and glass fibers mixed layer can be similar to that of carbon fiber blades.When the carbon fibers near the tip of the blade can improve the blade first-order modal and buckling factors. When it is close to the root of the blade has less impact on the blade maximum stress and strain.Under the premise of ensuring the blade stability and anti-resonance performance, when the carbon fibers and glass fibers layup ratio is 3∶1 and the carbon fibers are close to the root of the blade，the overall performance of the blade is better.
