3㎿ 풍력터빈 블레이드의 구조설계와 구조건전성 평가

This research presents structural design processes of 3㎿ wind turbine blades and their structural safety evaluation results by FEM analysis. The blade designs were based on modem wind turbine model, which is modem FRP stressed-skin sandwich design, and three kinds of blade models were designed. After structure designs of 3 kinds of blade models were accomplished, structural safety evaluations of the models were performed by Puck's composite failure theory. The results showed that "All glass model" had sufficient structural safety, and "carbon spar cap model" could be a reasonable solution to reduce weights, tip displacements.