Improved resonance method for fatigue test of full-scale wind turbine blades

To further reduce the power of exciter in common fatigue testing methods and increase frequency to decrease time, this paper proposes an improved method—Tug Fatigue Testing system (TFTs). The advantages new method are low high its due no with moving masses attached blade. In TFTs, exciters mounted on ground or fixed bracket can be used excite blade uniaxial biaxial test. paper, mechanical model TFTs is established compare motor required by inertial shear load blades both ways. Furthermore, a test 56.5 m will performed verify feasibility method. addition, bending moment distribution 80 excited was measured compared same resonance excitation evaluate effect. results prove that needs lower exciter, produces smaller loads, provides higher flap-wise direction than excitation. Biaxial tests also conducted