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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Structural Mechanics of Engineering Constructions and Buildings</journal-id><journal-title-group><journal-title xml:lang="en">Structural Mechanics of Engineering Constructions and Buildings</journal-title><trans-title-group xml:lang="ru"><trans-title>Строительная механика инженерных конструкций и сооружений</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1815-5235</issn><issn publication-format="electronic">2587-8700</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">26184</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2021-17-1-30-41</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Seismic resistence</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Сейсмостойкость сооружений</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Seismic stability of vibration-insulated turbine foundations depending on the frequency composition of seismic impact</article-title><trans-title-group xml:lang="ru"><trans-title>Сейсмостойкость виброизолированных фундаментов турбоагрегатов в зависимости от частотного состава сейсмического воздействия</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Babsky</surname><given-names>Aleksandr E.</given-names></name><name xml:lang="ru"><surname>Бабский</surname><given-names>Александр Евгеньевич</given-names></name></name-alternatives><bio xml:lang="en"><p>chief specialist (Structural Dynamics) of the Construction Department - Turbine Island</p></bio><bio xml:lang="ru"><p>главный специалист по динамике сооружений строительного отдела - турбинный остров</p></bio><email>vtarasov1000@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Lalin</surname><given-names>Vladimir V.</given-names></name><name xml:lang="ru"><surname>Лалин</surname><given-names>Владимир Владимирович</given-names></name></name-alternatives><bio xml:lang="en"><p>Professor of the Higher School of Industrial, Civil and Road Construction of the Institute of Civil Engineering, Dr.Sc.</p></bio><bio xml:lang="ru"><p>профессор Высшей школы промышленно-гражданского и дорожного строительства Инженерно-строительного института, доктор технических наук</p></bio><email>vtarasov1000@yandex.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Oleinikov</surname><given-names>Ilia I.</given-names></name><name xml:lang="ru"><surname>Олейников</surname><given-names>Илья Игоревич</given-names></name></name-alternatives><bio xml:lang="en"><p>design engineer of the Construction Department - Turbine Island</p></bio><bio xml:lang="ru"><p>инженер-проектировщик строительного отдела - турбинный остров</p></bio><email>vtarasov1000@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Tarasov</surname><given-names>Vladimir A.</given-names></name><name xml:lang="ru"><surname>Тарасов</surname><given-names>Владимир Александрович</given-names></name></name-alternatives><bio xml:lang="en"><p>graduate student of the Higher School of Industrial, Civil and Road Construction of the Institute of Civil Engineering</p></bio><bio xml:lang="ru"><p>аспирант Высшей школы промышленно-гражданского и дорожного строительства Инженерно-строительного института</p></bio><email>vtarasov1000@yandex.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">JSC ATOMPROEKT</institution></aff><aff><institution xml:lang="ru">Научно-исследовательский и проектно-конструкторский институт энергетических технологий «АТОМПРОЕКТ»</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Peter the Great Saint Petersburg Polytechnic University</institution></aff><aff><institution xml:lang="ru">Санкт-Петербургский политехнический университет Петра Великого</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2021-04-02" publication-format="electronic"><day>02</day><month>04</month><year>2021</year></pub-date><volume>17</volume><issue>1</issue><issue-title xml:lang="en">VOL 17, NO1 (2021)</issue-title><issue-title xml:lang="ru">ТОМ 17, №1 (2021)</issue-title><fpage>30</fpage><lpage>41</lpage><history><date date-type="received" iso-8601-date="2021-04-02"><day>02</day><month>04</month><year>2021</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2021, Babsky A.E., Lalin V.V., Oleinikov Ilia I.I., Tarasov V.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2021, Бабский А.Е., Лалин В.В., Олейников И.И., Тарасов В.А.</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="en">Babsky A.E., Lalin V.V., Oleinikov Ilia I.I., Tarasov V.A.</copyright-holder><copyright-holder xml:lang="ru">Бабский А.Е., Лалин В.В., Олейников И.И., Тарасов В.А.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/structural-mechanics/article/view/26184">https://journals.rudn.ru/structural-mechanics/article/view/26184</self-uri><abstract xml:lang="en"><p style="text-align: justify;">The seismic resistance of vibration-insulated turbine foundations is a complex and multifaceted problem that includes many aspects. The turbine foundation is a special building structure that unites parts of the turbine and generator unit into a single machine and it is used for static and dynamic loads accommodation. The number of designed and constructed power plants in high seismic level areas is large and steadily growing. In addition, engineers and designers deal with the issue of the frequency composition of the seismic impact influence on the seismic resistance of vibration-insulated turbine foundations. Dynamic calculations were performed in Nastran software using time history analysis and the finite element method. The main criteria for the seismic resistance of a vibration-insulated turbine foundation are the values of the maximum seismic accelerations in the axial direction at the level of the turbine installation and the values of vibration-insulated foundation maximum seismic displacements (deformations of vibration isolators). The results of the calculation experiments proved a significant effect of seismic action frequency composition on the behavior of the vibration-insulated turbine foundations. Calculations of foundations, taking into account earthquakes of the same intensity, but with different values of the prevailing frequencies of the impact, lead to the differing by several times values of the maximum seismic accelerations at the turbine level and seismic displacements.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Сейсмостойкость виброизолированных фундаментов турбоагрегатов сложнейшая и многогранная проблема, включающая в себя множество аспектов. Фундамент турбоагрегата - специальная строительная конструкция, объединяющая части турбоагрегата в единую машину и служащая для восприятия статических и динамических нагрузок. Количество проектируемых и строящихся электростанций в районах с высоким уровнем сейсмичности велико и продолжает расти. Среди прочих перед инженером-проектировщиком и расчетчиком возникает вопрос влияния частотного состава сейсмического воздействия на сейсмостойкость виброизолированных фундаментов турбоагрегатов. Динамические расчеты проводятся в программном комплексе Nastran методом прямого интегрирования уравнений движения с применением метода конечных элементов. Основными критериями сейсмостойкости виброизолированного фундамента турбоагрегата приняты величины максимальных сейсмических ускорений в осевом направлении на отметке установки турбоагрегата, а также величины максимальных сейсмических перемещений виброизолированного фундамента (деформации виброизоляторов). Результаты проведенных вычислительных экспериментов свидетельствуют о значительном влиянии частотного состава сейсмического воздействия на поведение виброизолированных фундаментов турбоагрегатов. Расчеты фундаментов, учитывающие землетрясения одинаковой интенсивности, но с различными значениями преобладающих частот воздействия, приводят к различающимся в несколько раз значениям максимальных сейсмических ускорений на отметке установки турбоагрегата и сейсмических перемещений.</p></trans-abstract><kwd-group xml:lang="en"><kwd>vibration-insulated turbine unit foundation</kwd><kwd>response spectrum</kwd><kwd>seismic stability</kwd><kwd>earthquake</kwd><kwd>seismic frequency composition</kwd><kwd>structural dynamics</kwd><kwd>seismic calculation</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>виброизолированный фундамент турбоагрегата</kwd><kwd>спектр ответа</kwd><kwd>сейсмостойкость</kwd><kwd>землетрясение</kwd><kwd>частотный состав сейсмического воздействия</kwd><kwd>динамика сооружений</kwd><kwd>сейсмический расчет</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This research work was supported by the Academic Excellence Project 5–100 proposed by Peter the Great Saint Petersburg Polytechnic University, Saint Petersburg, Russian Federation.</funding-statement><funding-statement xml:lang="ru">Работа выполнена при поддержке Academic Excellence Project 5–100, реализуемого Санкт-Петербургским политехническим университетом Петра Великого, Санкт-Петербург, Российская Федерация.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Birbraer A.N. 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