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Your search keyword '"Gontarovskii, P."' showing total 25 results
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25 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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24. THE INVESTIGATION OF TURBINE-BLADE VIBRATIONS ON THE BASIS OF THE APPLIED THEORY OF TWISTED RODS OF AN ELONGATED PROFILE

Author

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO, Sliva,O. K., Gontarovskii,P. P., Nevecherenko,E. G., FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO, Sliva,O. K., Gontarovskii,P. P., and Nevecherenko,E. G.

Abstract

A method for solving the problem of flexural-torsional vibrations of twisted blades based on the theory of B. F. Sharr is presented. The method was derived using an M-20 computer program. Taking into consideration the closeness of the natural frequencies of a rationally constructed discrete model to those of the original blade at a sufficiently small mass number, the discrete blade model was investigated assuming that its elastic properties coincide with those of the original blade. On the basis bar forms of vibrations, the vibration node lines on the blade were determined by the described method; these show a qualitatively good agreement with experimental data. The calculations revealed that on the basis of Sharr's theory of twisted bars, frequencies in the range of 6000-9000 Hz can be obtained for compressor blades with sufficient accuracy., Edited trans. of Dinamika i Prochnost Mashin (USSR) n6 p110-115 1967, by H. Peck.

Published
1969

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