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Your search keyword '"Gontarovskii, P."' showing total 24 results
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24 results on '"Gontarovskii, P."'

21. Torsional Vibrations and Damageability of Turboset Shaftings under Extraordinary Generator Loading*.

Author

Shul'zhenko, N., Gontarovskii, P., Garmash, N., and Grishin, N.

Subjects
*TORSIONAL vibration, *TURBINES, *SHAFTING machinery, *DYNAMIC loads, *SHORT circuits
Abstract

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]

Published
2015
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22. Influence of the Circumferential Non-Uniformity in the Material Mechanical Properties on the Deformation of Rotors of Power-Generating Units.

Author

Shul'zhenko, N., Gontarovskii, P., and Protasova, T.

Subjects
*MECHANICAL behavior of materials, *DEFORMATIONS (Mechanics), *ELECTRIC power production, *STEAM-turbine blades, *STRAINS & stresses (Mechanics)
Abstract

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]

Published
2014
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23. Numerical analysis of the long-term strength of the rotor disks of steam turbines.

Author

Shul'zhenko, N. G., Gontarovskii, P. P., Matyukhin, Yu. I., and Garmash, N. G.

Subjects
*NUMERICAL analysis, *STRENGTH of materials, *ROTORS, *TURBINES, *STRUCTURAL plates, *CORNER fillets
Abstract

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]

Published
2010
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