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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">ellibs</journal-id><journal-title-group><journal-title xml:lang="ru">Электронные библиотеки</journal-title><trans-title-group xml:lang="en"><trans-title>Russian Digital Libraries Journal</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">1562-5419</issn><publisher><publisher-name>Казанский (Приволжский) федеральный университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26907/1562-5419-2025-28-2-364-377</article-id><article-id custom-type="elpub" pub-id-type="custom">ellibs-550</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>Статьи</subject></subj-group></article-categories><title-group><article-title>Прогиб и первые собственные частоты колебаний регулярной арочной фермы</article-title><trans-title-group xml:lang="en"><trans-title>Deflection and First Natural Frequencies of a Regular Arched Truss Oscillation</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>Кирсанов</surname><given-names>Михаил Николаевич</given-names></name><name name-style="western" xml:lang="en"><surname>Kirsanov</surname><given-names>Мikhail Nikolaevich</given-names></name></name-alternatives><email xlink:type="simple">c216@ya.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский университет «МЭИ»</institution></aff><aff xml:lang="en"><institution>National Research University "МPEI"</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>28</day><month>05</month><year>2025</year></pub-date><volume>28</volume><issue>2</issue><elocation-id>364–377</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Кирсанов М.Н., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Кирсанов М.Н.</copyright-holder><copyright-holder xml:lang="en">Kirsanov М.N.</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://ellibs.elpub.ru/jour/article/view/550">https://ellibs.elpub.ru/jour/article/view/550</self-uri><abstract><p>Численно получены зависимости первых четырёх частот собственных колебаний плоской регулярной фермы распорного типа. Использована модель, в которой масса фермы концентрируется в её узлах. Для расчёта жёсткости фермы использована формула Максвелла–Мора. Для первой частоты методом индукции с использованием упрощённого варианта метода Донкерлея в системе компьютерной математики Maple построена аналитическая зависимость от числа панелей. Показано хорошее совпадение с численным результатом. Получена формула для статического прогиба фермы как функция числа панелей, размеров и нагрузки.
</p></abstract><trans-abstract xml:lang="en"><p>The dependences of the first four frequencies of natural oscillations of a planar regular truss of the thrust type are obtained numerically. A model is used in which the mass of the truss is concentrated in its nodes. The Maxwell–Mohr formula is used to calculate the rigidity of the truss. For the first frequency, an analytical dependence on the number of panels is derived by the induction method using a simplified version of the Dunkerley method in the Maple computer mathematics system. Good agreement with the numerical result is shown. An analytical dependence of the static deflection of the truss on its dimensions and load is obtained.
</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Плоская ферма</kwd><kwd>собственные колебания</kwd><kwd>первые частоты колебаний</kwd><kwd>прогиб</kwd><kwd>метод Донкерлея</kwd><kwd>аналитическое решение</kwd><kwd>Maple</kwd><kwd>основная частота</kwd><kwd>формула Максвелла–Мора</kwd><kwd>регулярная ферма</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Planar truss</kwd><kwd>natural oscillations</kwd><kwd>first oscillation frequencies</kwd><kwd>deflection</kwd><kwd>Dunkerley method</kwd><kwd>analytical solution</kwd><kwd>Maple</kwd><kwd>fundamental frequency</kwd><kwd>Maxwell–Mohr formula</kwd><kwd>regular truss</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">Саиян С.Г., Шитикова М.В. Сравнительный анализ динамического отклика зданий и сооружений различной высотности на ветровые и сейсмические воздействия // Строительная механика и конструкции. 2025. № 1(44). 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