]>

Table 3: Comparison of rms values (m) of healthy and cracked rotors with excitation.

Level frequency band D 6 78.125–156.25 Hz D 7 39.06–78.12 Hz D 8 19.53–39.06 Hz Healthy rotor 3.23 34.01 44.15 Cracked rotor 5.23 47.46 61.82 Percent change 61.9 39.6 40.0