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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">25617</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2020-16-6-472-480</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Thin Elastic Shells Theory</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Теория тонких упругих оболочек</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">An analysis of annular plate in curvilinear non-orthogonal coordinates with the help of equations of a shell theory</article-title><trans-title-group xml:lang="ru"><trans-title>Расчет кольцевой пластины в криволинейных неортогональных координатах с помощью уравнений теории оболочек</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Krivoshapko</surname><given-names>Sergey N.</given-names></name><name xml:lang="ru"><surname>Кривошапко</surname><given-names>Сергей Николаевич</given-names></name></name-alternatives><bio xml:lang="en"><p>Professor of the Department of Civil Engineering of Academy of Engineering, DSc, Professor</p></bio><bio xml:lang="ru"><p>профессор департамента строительства Инженерной академии, доктор технических наук, профессор</p></bio><email>sn_krivoshapko@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Peoples’ Friendship University of Russia (RUDN University)</institution></aff><aff><institution xml:lang="ru">Российский университет дружбы народов</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2020-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2020</year></pub-date><volume>16</volume><issue>6</issue><issue-title xml:lang="en">VOL 16, NO6 (2020)</issue-title><issue-title xml:lang="ru">ТОМ 16, №6 (2020)</issue-title><fpage>472</fpage><lpage>480</lpage><history><date date-type="received" iso-8601-date="2021-02-07"><day>07</day><month>02</month><year>2021</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2020, Krivoshapko S.N.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2020, Кривошапко С.Н.</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="en">Krivoshapko S.N.</copyright-holder><copyright-holder xml:lang="ru">Кривошапко С.Н.</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/25617">https://journals.rudn.ru/structural-mechanics/article/view/25617</self-uri><abstract xml:lang="en"><p>The complete system of equations of a linear theory of thin shells in curvilinear non-orthogonal coordinates proposed in the paper was taken as the basis of the investigation. Earlier, this system was used for static analysis of a long developable helicoid. In the article, this system is applied for the determination of stress-strain state of annular and circular plates under action of the external axisymmetric uniform load acting both in the plane of the plate and out-of-their plane. Presented results for annular plate given in the non-orthogonal coordinates ex-pand a number of problems that can be solved analytically. They can be used as the first terms of series of expansion of displacements of degrees of the small parameter if a small parameter method is applied for examining a long tangential developable helicoid.</p></abstract><trans-abstract xml:lang="ru"><p>В основу исследования положена полная система 20 уравнений в криволинейных неортогональных координатах линейной теории тонких оболочек, ранее использованная при статическом расчете длинного развертывающегося геликоида. В статье эта система применена для определения напряженно-деформированного состояния кольцевой и круглой пластин при внешней осесимметричной поверхностной нагрузке, действующей как в плоскости пластин, так и из их плоскости. Полученные результаты для кольцевой пластины в неортогональных координатах расширяют класс задач, которые теперь можно решить аналитически. Они могут быть использованы в качестве первых членов рядов разложения искомых перемещений в случае применения метода малого параметра применительно к длинному развертывающемуся геликоиду.</p></trans-abstract><kwd-group xml:lang="en"><kwd>arbitrary coordinates</kwd><kwd>shell theory</kwd><kwd>tangential developable helicoid</kwd><kwd>annular plate</kwd><kwd>equilibrium equations</kwd><kwd>axisymmetric load</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>неортогональные координаты</kwd><kwd>теория оболочек</kwd><kwd>развертывающийся геликоид</kwd><kwd>кольцевая пластинка</kwd><kwd>уравнения равновесия</kwd><kwd>осесимметричная нагрузка</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Goldenveizer A.L. Theory of Elastic Thin Shells. New York: Pergamon Press; 1961.</mixed-citation><mixed-citation xml:lang="ru">Goldenveizer A.L. Theory of Elastic Thin Shells. 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