Aeroelastic Analysis And Crack Diagnosis Of Wind Turbine Blade

Under the background of global living environment deterioration and energy crisis, looking for a clean, renewable energy sources to replace fossil fuels become a top priority of the world. Wind power as a low cost green energy has large reserves, and thus the study of wind power technology is of importance.Wind turbine blades are the source of power and core technology of wind generators. In the long-running or in some extreme conditions, crack or damage likely occurs on the surface of blades. If the wind generators continue to work at this time, the crack will expand until the blade breaks, which leading to incalculable losses. Therefore, the study of crack diagnosis and forecasting techniques of wind turbine blades has significant and far-reaching significance.The core content of this article is aeroelastic analysis and crack diagnosis of wind turbine blade. The details are as follows:1. Based on aerodynamics of wind turbine blade and fluid-structure coupling analysis basic theory, do wind turbine blades aeroelastic analysis in ANSYS Workbench;2. Do aeroelastic analysis of wind turbine blades with crack damage, and according to the time course of the stress distribution of feature points, based on the energy method and EMD methods, diagnose and identify the blade crack in the time domain and frequency domain respectively;3. Use blade model, strain gauge, dynamic signal acquisition and other equipment to make experimental study of aeroelastic analysis and crack damage diagnosis of wind turbine blades.Through these studies in this paper, aeroelastic analysis of wind turbine blades is made successfully, and an efficient wind turbine blades crack damage diagnosis method is got.