In order to solve the problems of spectrum alias error and spectrum coefficient periodically reiteration cause by using fast Fourier transform(FFT)

the fast anti-aliasing Fourier transform was employed to improve analysis accuracy and efficiency of alternating frequency/time domain method.The nonlinear forced response of a real turbine blade was calculated by using the anti-aliasing alternating frequency/time domain method

and the computational accuracy and time were compared with these of the normal method.The results indicate that under certain parameter conditions

the calculation speed of the anti-aliasing alternating frequency/time domain method is about 4 times of the normal one

while the precisions are almost the same.These findings confirm the practicability of the anti-aliasing alternating frequency/time domain method in computing dynamic response of nonlinear systems based on finite element model for high precision analysis.