Analysis of flutter vibration response of large wind turbine blades under resonant loads

Abstract

Based on the finite element method, the structural model of large wind turbine blades is established and the natural frequency and natural vibration mode of the structure are studied. The vibration response of the structure under the resonant load is calculated. The displacement amplitude and phase angle at the tip are obtained with frequency. It is found that under the given resonant load conditions, the maximum displacement amplitude and the maximum phase angle at the tip are within the allowable range of the structure, and the structure does not undergo resonance damage. Through the harmonic response vibration analysis of the wind turbine blade, it can provide an effective theoretical basis for the safe design of the blade.