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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">izvuzmath</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. Математика</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya Vysshikh Uchebnykh Zavedenii. Matematika</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0021-3446</issn><issn pub-type="epub">2076-4626</issn><publisher><publisher-name>Казанский (Приволжский) федеральный университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26907/0021-3446-2025-4-53-59</article-id><article-id custom-type="elpub" pub-id-type="custom">izvuzmath-182</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>Собственные малые колебания плоской вязкоупругой спиральной пружины</article-title><trans-title-group xml:lang="en"><trans-title>Natural small oscillations of a flat viscoelastic spiral spring</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>Сафаров</surname><given-names>И. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Safarov</surname><given-names>I. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Исмоил Иброхимович Сафаров</p><p>Ул. А. Навои, д. 32, Ташкент, 100011</p></bio><bio xml:lang="en"><p>Ismail Ibrahimovich Safarov</p><p>32 A. Navoi str., Tashkent, 100011</p></bio><email xlink:type="simple">safarov54@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тешаев</surname><given-names>М. Х.</given-names></name><name name-style="western" xml:lang="en"><surname>Teshaev</surname><given-names>M. Kh.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мухсин Худойбердиевич Тешаев</p><p>Ул. М. Икбол, д. 11, Бухара, 200118</p></bio><bio xml:lang="en"><p>Mukhsin Khudoyberdievich Teshaev</p><p>11 M. Ikbol str., Bukhara, 200118</p></bio><email xlink:type="simple">muhsin-5@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Жураев</surname><given-names>Ш. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Juraev</surname><given-names>Sh. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шухрат Исраилович Жураев</p><p>Ул. М. Икбол, д. 11, Бухара, 200118</p></bio><bio xml:lang="en"><p>Shukhrat Israilovich Juraev</p><p>11 M. Ikbol str., Bukhara, 200118</p></bio><email xlink:type="simple">sh.i.juraev@buxdu.uz</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хомидов</surname><given-names>Ф. Ф.</given-names></name><name name-style="western" xml:lang="en"><surname>Khomidov</surname><given-names>F. F.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Фарход Фахриддинович Хомидов</p><p>Ул. Муртазаева, д. 15, Бухара, 200100</p></bio><bio xml:lang="en"><p>Farhod Faxriddinovich Khomidov</p><p>15 Murtazaeva str., Bukhara, 200100</p></bio><email xlink:type="simple">Farhod2708@mail.ru</email><xref ref-type="aff" rid="aff-4"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Ташкентский химико-технологический институт</institution><country>Узбекистан</country></aff><aff xml:lang="en"><institution>Tashkent Institute of Chemical Technology</institution><country>Uzbekistan</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Бухарские отделение Института математики имени В.И. Романовского Академии наук Республики Узбекистан</institution><country>Узбекистан</country></aff><aff xml:lang="en"><institution>Bukhara Branch of Institute of Mathematics named after Romanovskii AS</institution><country>Uzbekistan</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Бухарский государственный университет</institution><country>Узбекистан</country></aff><aff xml:lang="en"><institution>Bukhara State University</institution><country>Uzbekistan</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>Бухарский инженерно-технологический институт</institution><country>Узбекистан</country></aff><aff xml:lang="en"><institution>Bukhara Engineering Technological Institute</institution><country>Uzbekistan</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>25</day><month>04</month><year>2025</year></pub-date><volume>0</volume><issue>4</issue><fpage>53</fpage><lpage>59</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Сафаров И.И., Тешаев М.Х., Жураев Ш.И., Хомидов Ф.Ф., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Сафаров И.И., Тешаев М.Х., Жураев Ш.И., Хомидов Ф.Ф.</copyright-holder><copyright-holder xml:lang="en">Safarov I.I., Teshaev M.K., Juraev S.I., Khomidov F.F.</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://izvuzmath.elpub.ru/jour/article/view/182">https://izvuzmath.elpub.ru/jour/article/view/182</self-uri><abstract><p>Системы криволинейных труб широко используются в машиностроении, атомной промышленности, морской нефтедобыче, аэрокосмической технике. Целью работы является исследование малых колебаний вязкоупругой спиральной пружины. Малые колебания тонкого криволинейного стержня, упругая линия которого является плоской кривой и одна из главных направлений поперечного сечения которой лежит в плоскости кривой, распадаются на два вида: колебания со смещениями в плоскости кривой и со смещениями, перпендикулярными плоскости кривой. Вязкоупругие свойства материалов учитываются с помощью комплексных модулей упругости. Построены асимптотические разложения для собственных функций и собственных частот, соответствующих обоим видам колебаний многократно закрученной плоской спиральной пружины с закрепленными концами. Разработана методика получения разрешающих уравнений, соответствующих граничным условиям.</p></abstract><trans-abstract xml:lang="en"><p>Curved pipe systems are widely used in mechanical engineering, the nuclear industry, offshore oil production, and aerospace engineering. The purpose of the work is to study small vibrations of a viscoelastic helical spring. Small vibrations of a thin curved rod, the elastic line of which is a flat curve and one of the main directions of the cross-section of which lies in the plane of the curve, break down into two types: vibrations with displacements in the plane of the curve and with displacements perpendicular to the plane of the curve. The viscoelastic properties of materials are taken into account using complex elastic moduli. Asymptotic expansions are constructed for the eigenfunctions and eigenfrequencies corresponding to both types of oscillations of a repeatedly twisted flat spiral spring with fixed ends. A technique has been developed for obtaining resolving equations corresponding to the boundary conditions.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>малые колебания</kwd><kwd>спиральная пружина</kwd><kwd>вязкоупругие свойства</kwd><kwd>смещение</kwd><kwd>собственная функция</kwd><kwd>частота</kwd></kwd-group><kwd-group xml:lang="en"><kwd>small vibrations</kwd><kwd>spiral spring</kwd><kwd>viscoelastic properties</kwd><kwd>displacement</kwd><kwd>eigenfunction</kwd><kwd>frequency</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">Pa¨ıdoussis M.P. The canonical problem of the fluid-conveying pipe and radiation of the knowledge gained to other dynamics problems across Applied Mechanics, J. Sound Vib. 310 (3), 462–492 (2008).</mixed-citation><mixed-citation xml:lang="en">Pa¨ıdoussis M.P. 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