Iryna Tretiak
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Iryna Tretiak has a total of 10 co-authors. Here are the top co-authors by number of shared publications:
- Dmytro Krytskyi
Department of Design Information Technologies, National Aerospace University “KhAI”, 61070 Kharkiv, Ukraine
2 shared publications - Igor Kobzar
Special Design Office for Turbogenerators and Hydrogenerators, Join Stock Company “Ukrainian Energy Machines”, 61037 Kharkiv, Ukraine
2 shared publications - Mariia Arefieva
Private Institution of General Secondary Education "Kharkiv Lyceum "IT STEP SCHOOL Kharkiv
2 shared publications - Oleksii Tretiak
Natl Aerosp Univ, Fac Aircraft Engn, Dept Aerohydrodynam, Kharkiv Aviat Inst, Kharkov, Ukraine
2 shared publications - Dmytro Brega
Department of Aerohydrodynamics, National Aerospace University Kharkiv Aviation Institute, 61070 Kharkiv, Ukraine
1 shared publication - Hromenko Denys
Faculty of Aircraft Engineering, Department of Aerohydrodynamics, National Aerospace University «Kharkiv Aviation Institute», 61070 Kharkiv, Ukraine
1 shared publication
Latest Publications
- Open Access
- 16 March 2023
- Published by MDPI AG in Computation
- Vol. 11 (3) , 60
Stress-Strained State of the Thrust Bearing Disc of Hydrogenerator-Motor
In this article, the main causes of vibration in the thrust bearing of hydrogenerator motors rated 320 MW are considered. The main types of internal and surface defects that appear on the working surface of the thrust bearing disc during long-term operation are considered. A method of three-dimensional modeling of such defects is presented, and an assessment of the stress-strain state of the heel disc is proposed, taking into account the main forces acting on the working surface using the finite element method. An analysis of the possible further operation of discs with similar defects, in accordance with the technical requirements, is carried out, and we consider ways to eliminate them.
- 16 March 2023
- Published by MDPI AG in Computation
- Vol. 11 (3) , 60
Open AccessStress-Strained State of the Thrust Bearing Disc of Hydrogenerator-Motor
In this article, the main causes of vibration in the thrust bearing of hydrogenerator motors rated 320 MW are considered. The main types of internal and surface defects that appear on the working surface of the thrust bearing disc during long-term operation are considered. A method of three-dimensional modeling of such defects is presented, and an assessment of the stress-strain state of the heel disc is proposed, taking into account the main forces acting on the working surface using the finite element method. An analysis of the possible further operation of discs with similar defects, in accordance with the technical requirements, is carried out, and we consider ways to eliminate them.
- Open Access
- 28 October 2022
- Published by MDPI AG in Computation
- Vol. 10 (11) , 191
Modeling of the Stress–Strain of the Suspensions of the Stators of High-Power Turbogenerators
In the submitted scientific work, the existing types of stator fastening design of turbogenerators and the main causes of the stressed state of the stator suspensions are considered. A detailed calculation of the complex stressed state of the turbogenerator stator suspension was carried out for a number of electrical sheet steels, taking into consideration the unevenness of the heat distribution along the horizontal axis of the unit. It is proposed that the calculation of the mechanical stress is carried out by means of the mechanical and thermal calculation, coordinated with the electrical one. The possibility of replacing steel 38Х2Н2ВА with steel 34CrNiMo6 and 40NiCrMo7 is indicated, subject to compliance with GOST 8479-70 for the same strength group.
- 28 October 2022
- Published by MDPI AG in Computation
- Vol. 10 (11) , 191
Open AccessModeling of the Stress–Strain of the Suspensions of the Stators of High-Power Turbogenerators
In the submitted scientific work, the existing types of stator fastening design of turbogenerators and the main causes of the stressed state of the stator suspensions are considered. A detailed calculation of the complex stressed state of the turbogenerator stator suspension was carried out for a number of electrical sheet steels, taking into consideration the unevenness of the heat distribution along the horizontal axis of the unit. It is proposed that the calculation of the mechanical stress is carried out by means of the mechanical and thermal calculation, coordinated with the electrical one. The possibility of replacing steel 38Х2Н2ВА with steel 34CrNiMo6 and 40NiCrMo7 is indicated, subject to compliance with GOST 8479-70 for the same strength group.