As. Sekhar et Pb. Prasad, DYNAMIC ANALYSIS OF A ROTOR SYSTEM CONSIDERING A SLANT CRACK IN THE SHAFT, Journal of sound and vibration, 208(3), 1997, pp. 457-474
The dynamic behaviour of structures-in particular, rotors containing c
racks-is a subject of considerable current interest. Several researche
rs have del eloped models of cracked rotor systems considering mainly
the transverse surface crack. In the present study finite element (FEM
) analysis of a rotor-bearing system for flexural vibrations has been
considered by including a shaft having a slant crack that has resulted
from the fatigue of the shaft due to the torsional moment. A flexibil
ity matrix for a slant crack and later the stiffness matrix of a slant
cracked element have been developed to be used subsequently in the FE
M analysis of the rotor-bearing system. The frequency spectrum of the
steady state response of the cracked rotor was found to have sub-harmo
nic frequency components at an interval frequency corresponding to the
torsional frequency, which can be used for crack detection. (C) 1997
Academic Press Limited.