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The paper considers torsional vibrations of turbine shaftings under sudden generator rotor loadings, which are caused by two- and three-phase short circuit. The fatigue damageability of shaftings under the most unfavorable loading conditions has been assessed. [ABSTRACT FROM AUTHOR]

The paper considers the irreversible deformation of steam turbine rotors due to the circumferential non-uniformity of the material mechanical properties based on the numerical analysis of their three-dimensional stress-strain state. It is shown that this non-uniformity can be one of the causes for the occurrence and development of progressive creep deflection of high-temperature rotors that have been in long-term operation and also their bending in case of excess of the rated rotational speed. [ABSTRACT FROM AUTHOR]

We present the results of numerical analyses (in the three-dimensional statement) of the kinetics of stressed state and accumulation of dispersed defects in the zone of discharge holes in the rotor disks of a steam turbine in creep for 400,000 h. It is shown that the zones of discharge holes in the disks of the first two stages suffer the action of the highest stresses and the material in these zones is damaged more intensely that near the surface of the axial channel. [ABSTRACT FROM AUTHOR]

We present results of assessing the crack resistance of three-seat lock joint of gas turbine blade under low-cycle fatigue and creep conditions of material in the presence of a hypothetical crack. The stress intensity factor is calculated by the finite element method. [ABSTRACT FROM AUTHOR]