To study the effects of the wind pressure

centrifugal force

and gravity on the structural characteristics and strength of the blade

a wind turbine blade model with 1.5 MW is established. Combining with the composite laminate

the aerodynamic load distribution of the blade is calculated by using the computaional fluid dynamics (CFD) method

and loading to the blade surface

the changes of stress

displacement

and strength of the blade under different wind speeds

rotating speeds

and phase angles are analyzed. The results show that the variation of the maximum displacement

maximum stress

and maximum inverse reserve factor (IRF) of the blade with the rotating speed conforms to the law of cubic polynomial. The larger stress and IRF are mainly concentrated at 0.2R and 0.3R-0.7R of blade spanwise. The maximum displacement and stress change obviously with the phase angle when the wind speed is small

and the maximum IRF changes obviously with the phase angle when the wind speed is small. The curve of maximum IRF with phase angle is W-shaped

and the fitting curve conforms to the second order Fourier function. The results can provide theoretical and data reference for blade design or maintenance monitoring.