Analysis of Modal Parameters Using a Statistical Approach for Condition Monitoring of the Wind Turbine Blade

摘要: The primary objective of the presented paper is numerical and experimental investigation related to developing a useful diagnostic method, which can be used for determining site size damage in laminated shells wind turbine blades. described detection technique based on analysis low frequencies bending vibrations mode shapes rotor authors commonly applied statistics methods that have been adapted detect edges damage, including normalized determination coefficient fit, measure absolute fit between two curves. research was conducted scaled-down blade three-bladed horizontal-axis with 36 m diameter rotor. study divided into parts. first stage included calculations using finite element were supplemented second by measurements under laboratory conditions specially manufactured composite blade. forms natural intact damaged determined Laser Doppler Scanning Vibrometry. results confirm effectiveness modal combined statistic calculation detection. method points out location relatively small damage.