Crack Diagnosis of Wind Turbine Blades Based on EMD Method

2016 2nd International Conference on Mechanical Engineering and Automation Science

机械制造;无线电电子学

Cui, Hong-Yu^1 ; Ning, Ding^1,2 ; Ming, Hong^1

School of Naval Architecture, Dalian University of Technology, Dalian

116024, China^1

COSCO-SHIPYARD, COSCO Ship DESIGN CENTER, Dalian

116600, China^2

关键词: Ansys workbenches;    Diagnosis methods;    Elastic analysis;    Extreme conditions;    Fluid structure couplings;    Time and frequency domains;    Wind generator systems;    Wind turbine blades;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/157/1/012003/pdf
DOI  :  10.1088/1757-899X/157/1/012003

来源: IOP

【 摘 要 】

Wind turbine blades are both the source of power and the core technology of wind generators. After long periods of time or in some extreme conditions, cracks or damage can occur on the surface of the blades. If the wind generators continue to work at this time, the crack will expand until the blade breaks, which can lead to incalculable losses. Therefore, a crack diagnosis method based on EMD for wind turbine blades is proposed in this paper. Based on aerodynamics and fluid-structure coupling theory, an aero-elastic analysis on wind turbine blades model is first made in ANSYS Workbench. Second, based on the aero-elastic analysis and EMD method, the blade cracks are diagnosed and identified in the time and frequency domains, respectively. Finally, the blade model, strain gauge, dynamic signal acquisition and other equipment are used in an experimental study of the aero-elastic analysis and crack damage diagnosis of wind turbine blades to verify the crack diagnosis method proposed in this paper.