The effect of coriolis force on the stability in a rotational blade-disk with a cracked blade was presented in this paper. A disk comprising of periodically shrouded blades was used to simulate the weakly coupled periodic structure. The mode localization phenomenon introduced by the blade crack on the longitudinal and bending vibrations on the rotating blades are considered. The Galerkin method was used to derive the unperturbation equations for the system. The boundaries of instability zones of the mistuned system were approximated by employing the so called multiple scales method. The effects of coriolis force and the magnitude of crack on the variation of the dynamic stability zones in a cracked blade-disk system are investigated numerically. Numerical results indicate that the coriolis force and the coupling effect between longitudinal and bending vibrations could affect the dynamic stability in a mistuned system significantly.

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