FREE VIBRATIONS ANALYSIS OF SHROUDED BLADED DISCS WITH ONE LOOSE BLADE
As a failure of rotor blades in a gas turbine was reported, the rotating-mode shapes of flexible shrouded bladed disc assemblies were calculated using a finite element approach. Rotational effects, such as centrifugal stiffening were accounted for, and all couplings between the flexible parts were allowed. The spin softening effects were neglected. A dynamic analysis of the shrouded bladed disc demonstrated that it was designed with a sufficient safety region of resonance. In case of one blade getting loose, it is vibrating in resonance.
Keywords:blade, shrouded bladed disc, free vibration
- Vol. 10 No. 1 (2006)
- Research article
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