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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">maplants</journal-id><journal-title-group><journal-title xml:lang="ru">Машины и установки: проектирование, разработка и эксплуатация</journal-title><trans-title-group xml:lang="en"><trans-title>Machines and Plants: Design and Exploiting</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2412-592X</issn><publisher><publisher-name>МОО "Стратегия объединения"</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">maplants-32</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ТЕПЛОВЫЕ ДВИГАТЕЛИ, ГИДРАВЛИЧЕСКИЕ МАШИНЫ, АППАРАТЫ ХОЛОДИЛЬНОЙ И КРИОГЕННОЙ ТЕХНИКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>HEAT ENGINES, HYDRAULIC MACHINES, REFRIGERATING AND CRYOGENIC EQUIPMENT</subject></subj-group></article-categories><title-group><article-title>Теоретическое исследование циклической нагруженности деталей электропривода клети дуо-160</article-title><trans-title-group xml:lang="en"><trans-title>Theoretical Studying the Cyclic Loading of Electric Drive Parts of the Stand duo-160</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мальцев</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Maltsev</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="en"><p>Moscow</p></bio><email xlink:type="simple">a.a.mal@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>МГТУ им. Н.Э. Баумана</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Bauman Moscow State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2015</year></pub-date><pub-date pub-type="epub"><day>17</day><month>06</month><year>2016</year></pub-date><volume>0</volume><issue>6</issue><fpage>71</fpage><lpage>84</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Мальцев А.А., 2016</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="ru">Мальцев А.А.</copyright-holder><copyright-holder xml:lang="en">Maltsev A.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.maplants-journal.ru/jour/article/view/32">https://www.maplants-journal.ru/jour/article/view/32</self-uri><abstract><p>В качестве объекта теоретического исследования выбран электропривод рабочих валков одноклетьевого прокатного стана дуо-160, расположенного в лаборатории МГТУ им. Н.Э. Баумана. После захвата заготовки рабочими валками, в электроприводе возникают крутильные колебания, для определения форм и частот которых построена 5-массовая динамическая модель. Построены графики моментов сил упругости с учетом демпферов и люфтов. Установлено, что приведенные амплитуды циклических касательных напряжений, возникающих в опасном сечении наиболее нагруженного верхнего шпинделя, не превышают его предел выносливости в этом сечении. DOI: 10.7463/aplts.0615.0822332</p></abstract><trans-abstract xml:lang="en"><p>An electric drive of work rolls of the single-stand rolling mill duo-160 located in the laboratory of Bauman Moscow State Technical University (BMSTU) is selected as an object of the theoretical study. After the work rolls have gripped the work-piece the torsional vibrations occur in the drive; a 5-mass dynamic model is built to determine their forms and frequencies. Equations of torsionalvibration movement of masses with time are based on the Lagrange equations of type II. The paper identifies intrinsic moments of inertia and angular stiffness of parts and units of the electric drive. The graphs of the moments of elastic forces are built taking into consideration the dampers and backlashes. A revealed transition process has shown that given amplitudes of the cyclic shear stresses arising in dangerous section of the most loaded top spindle do not exceed the limit of its endurance in this section. In case of excess revealed, it would lead to accumulation of fatigue damage in the spindle metal and to formation of fatigue crack that most probably would appear near the shaft surface rather than in the metal mass. With further using the electric drive this micro-crack would be gradually evolved into macro-crack, the working cross-sectional area of the shaft would be reduced so that there would be a spindle failure and on the surface of a fatigue fracture of its shaft a strongly marked crack growth zone and a completely broken zone would be observed.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>прокатный стан</kwd><kwd>циклическое нагружение</kwd><kwd>динамическая модель</kwd><kwd>электропривод валков</kwd></kwd-group><kwd-group xml:lang="en"><kwd>rolling mill</kwd><kwd>electric rollers</kwd><kwd>cyclic loading</kwd><kwd>dynamic model</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Головин А.А., Костиков Ю.В., Красовский А.Б. Динамика механизмов: учеб. пособие. 2-е изд. М.: МГТУ им. Н.Э. 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