{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:59:08Z","timestamp":1760147948345,"version":"build-2065373602"},"reference-count":20,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2023,3,16]],"date-time":"2023-03-16T00:00:00Z","timestamp":1678924800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Computation"],"abstract":"<jats:p>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.<\/jats:p>","DOI":"10.3390\/computation11030060","type":"journal-article","created":{"date-parts":[[2023,3,17]],"date-time":"2023-03-17T03:33:57Z","timestamp":1679024037000},"page":"60","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Stress-Strained State of the Thrust Bearing Disc of Hydrogenerator-Motor"],"prefix":"10.3390","volume":"11","author":[{"given":"Oleksii","family":"Tretiak","sequence":"first","affiliation":[{"name":"Department of Aerohydrodynamics, National Aerospace University Kharkiv Aviation Institute, 61070 Kharkiv, Ukraine"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4919-0194","authenticated-orcid":false,"given":"Dmitriy","family":"Kritskiy","sequence":"additional","affiliation":[{"name":"Department of Information Technology Design, National Aerospace University Kharkiv Aviation Institute, 61070 Kharkiv, Ukraine"}]},{"given":"Igor","family":"Kobzar","sequence":"additional","affiliation":[{"name":"Special Design Office for Turbogenerators and Hydrogenerators, Join Stock Company \u201cUkrainian Energy Machines\u201d, 61037 Kharkiv, Ukraine"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2569-0194","authenticated-orcid":false,"given":"Mariia","family":"Arefieva","sequence":"additional","affiliation":[{"name":"Department of Aerohydrodynamics, National Aerospace University Kharkiv Aviation Institute, 61070 Kharkiv, Ukraine"}]},{"given":"Volodymyr","family":"Selevko","sequence":"additional","affiliation":[{"name":"Section of Postgraduate and Doctoral Studies, National Aerospace University Kharkiv Aviation Institute, 61070 Kharkiv, Ukraine"}]},{"given":"Dmytro","family":"Brega","sequence":"additional","affiliation":[{"name":"Department of Aerohydrodynamics, National Aerospace University Kharkiv Aviation Institute, 61070 Kharkiv, Ukraine"}]},{"given":"Kateryna","family":"Maiorova","sequence":"additional","affiliation":[{"name":"Aircraft Manufacturing Department, National Aerospace University, Kharkiv Aviation Institute, 61070 Kharkiv, Ukraine"}]},{"given":"Iryna","family":"Tretiak","sequence":"additional","affiliation":[{"name":"Aerospace Thermal Engineering Department, National Aerospace University, Kharkiv Aviation Institute, 61070 Kharkiv, Ukraine"}]}],"member":"1968","published-online":{"date-parts":[[2023,3,16]]},"reference":[{"unstructured":"Generator Cradle (2023, January 10). TPK Cheboksary-Electra. Available online: https:\/\/chebelektra.ru\/dlya-ges\/podpyatnik-generatora.","key":"ref_1"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"376","DOI":"10.1177\/1350650114550346","article-title":"Performance comparison between textured, pocket, and tapered-land sector-pad thrust bearings using computational fluid dynamics thermohydrodynamic analysis","volume":"229","author":"Fouflias","year":"2015","journal-title":"Proc. Inst. Mech. Eng. Part I J. Eng. Tribol."},{"unstructured":"(2023, March 06). XL_ThrustBearing\u00ae: A Computational Physics Analysis Tool for Tilting Pad Thrust Bearings (Both Regular and Self-Equalizing Types). 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Machinary Lubrication, Noria Corporation.","key":"ref_7"},{"key":"ref_8","first-page":"20","article-title":"About the supports of hydrounits of Dniprovskaya HPP-1","volume":"4","author":"Savchenko","year":"2010","journal-title":"Hydroenergetics Ukr."},{"unstructured":"(2023, February 11). SOU-N EE 20.302:2020. Testing Standards Electrical Equipment Approved by Order of the Ministry of Energy and Environmental Protection of Ukraine. Available online: https:\/\/docs.dtkt.ua\/download\/pdf\/1225.943.1.","key":"ref_9"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"108490","DOI":"10.1016\/j.ijepes.2022.108490","article-title":"A comprehensive study on stator vibrations in synchronous generators considering both single and combined SAGE cases","volume":"143","author":"Zhang","year":"2022","journal-title":"Int. J. Electr. Power Energy Syst."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"138","DOI":"10.1016\/j.ymssp.2019.06.020","article-title":"Analysis of the gyroscopic effect on the hydro-turbine generator unit","volume":"132","author":"Li","year":"2019","journal-title":"Mech. Syst. Signal Process"},{"doi-asserted-by":"crossref","unstructured":"Valavi, M., Nysveen, A., Nilsen, R., Le Besnerais, J., and Devillers, E. (2017, January 1\u20135). Analysis of magnetic forces and vibration in a converter-fed synchronous hydrogenator. Proceedings of the 2017 IEEE Energy Conversion Congress and Exposition (ECCE), Cincinnati, OH, USA.","key":"ref_12","DOI":"10.1109\/ECCE.2017.8096018"},{"doi-asserted-by":"crossref","unstructured":"T\u00e9treault, A. (2012, January 23\u201327). Rotor shape vs. rotor field pole pole shorted turns: Impact on rotor induced vibrations on hydrogenerators. 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