Critical speed and natural frequency of rotary shaft were obtained experimentally using Fast Fourier Transform. Critical speed varies in the range of 5% to due to change in crack depth and crack location. Variation of natural frequency was observed 6% to 12% due to change in crack depth and crack location. Frequency vs. amplitude analysis of rotary shaft carried out using Fast Fourier Transform analyzer. | Critical speed and natural frequency analysis of cracked rotor shaft
