Structural Analysis and Proof Test of Composite Rotor Blades for Wind Turbine

풍력발전기용 복합재 블레이드의 구조해석 및 인증시험

GFRP based composite rotor blades were developed for 750kW & 2MW wind turbines. The blade sectional geometry was designed to have a general shell-spar and shear web structure. For verifying the structural safety under all relevant extreme loads specified in the GL guidelines, the structural analysis of the rotor blades was performed using commercial FEM codes. The static load carrying capacity, blade tip deflections and natural frequencies were evaluated to satisfy the strength and stability requirements. Full-scale proof tests of rotor blades were carried out with optical fiber sensors for real-time condition monitoring. Finally, the prototype of each rotor blade passed all proof tests for GL certification.