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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">51205</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2026-22-2-138-151</article-id><article-id pub-id-type="edn">KCJJXB</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Analysis of thin elastic shells</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Расчет 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">Comparative Analysis of Calculation of a Plate of Curvilinear Trapezoidal Plan using Numerical Methods</article-title><trans-title-group xml:lang="ru"><trans-title>Сравнительный анализ расчета пластины на криволинейно-трапециевидном плане численными методами</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4023-156X</contrib-id><contrib-id contrib-id-type="spin">3110-9909</contrib-id><name-alternatives><name xml:lang="en"><surname>Ivanov</surname><given-names>Vyacheslav N.</given-names></name><name xml:lang="ru"><surname>Иванов</surname><given-names>Вячеслав Николаевич</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Technical Sciences, Professor of the Department of Construction Technology and Structural Materials, Engineering Academy</p></bio><bio xml:lang="ru"><p>доктор технических наук, профессор кафедры технологий строительства и конструкционных материалов, инженерная академия</p></bio><email>i.v.ivn@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8742-3521</contrib-id><contrib-id contrib-id-type="spin">5501-6984</contrib-id><name-alternatives><name xml:lang="en"><surname>Tupikova</surname><given-names>Evgenia M.</given-names></name><name xml:lang="ru"><surname>Тупикова</surname><given-names>Евгения Михайловна</given-names></name></name-alternatives><bio xml:lang="en"><p>PhD, Associate Professor of the Department of Civil Engineering, Academy of Engineering</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры технологий строительства и конструкционных материалов, инженерная академия</p></bio><email>emelian-off@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2206-2563</contrib-id><contrib-id contrib-id-type="spin">9184-7432</contrib-id><name-alternatives><name xml:lang="en"><surname>Rynkovskaya</surname><given-names>Marina I.</given-names></name><name xml:lang="ru"><surname>Рынковская</surname><given-names>Марина Игоревна</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Technical Sciences, Associate Professor of the Department of Construction Technology and Structural Materials, Academy of Engineering</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры технологий строительства и конструкционных материалов, инженерная академия</p></bio><email>rynkovskaya-mi@rudn.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">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="2026-07-08" publication-format="electronic"><day>08</day><month>07</month><year>2026</year></pub-date><volume>22</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>138</fpage><lpage>151</lpage><history><date date-type="received" iso-8601-date="2026-07-10"><day>10</day><month>07</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, Ivanov V.N., Tupikova E.M., Rynkovskaya M.I.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, Иванов В.Н., Тупикова Е.М., Рынковская М.И.</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">Ivanov V.N., Tupikova E.M., Rynkovskaya M.I.</copyright-holder><copyright-holder xml:lang="ru">Иванов В.Н., Тупикова Е.М., Рынковская М.И.</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/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/structural-mechanics/article/view/51205">https://journals.rudn.ru/structural-mechanics/article/view/51205</self-uri><abstract xml:lang="en"><p>Roofs in the form of plates and shells of complex curvilinear plan are common structural solutions in architecture. Such structures have a number of advantages. The mid-surface of shells and plates of curvilinear trapezoidal plan is constructed using parametric and vector equations and has a number of special aspects to consider when calculating their stress-strain state. For structures of this shape, no exact analytical solution has been obtained, but it is possible to obtain a numerical solution, for example, by the finite element method and the variational-difference method. In such a situation, for verification of calculations, comparing the results obtained using different numerical procedures is useful and relevant. A comparative analysis of the results of calculating the stress-strain state of a plate curvilinear in plan, obtained by the methods mentioned above, was conducted. In the literature, the topic of calculating plates and shells of curvilinear trapezoidal plan is insufficiently developed. The aim of the study is to obtain data on the calculation of the stress-strain state of a plate of curvilinear trapezoidal plan, as well as to assess the applicability and specifics of the two methods in calculating such structures. To accomplish the tasks, the following software was used: ANSYS APDL software for calculation by the finite element method, and the author-developed SHELLVRM program for calculation by the variational-difference method. The parameters of the stress-strain state of a plate of curvilinear trapezoidal plan have been obtained and analyzed, verification of the obtained results has been carried out, recommendations for implementing both calculation methods in the practice of structural analysis have been given, and computational difficulties and special aspects of both methods have been identified.</p></abstract><trans-abstract xml:lang="ru"><p>Покрытия в виде пластин и оболочек на сложных криволинейных планах являются распространенными конструктивными решениями в архитектуре. Такие конструкции имеют ряд преимуществ. Срединные поверхности оболочек и пластин на криволинейно-трапециевидных планах строятся при помощи параметрических и векторных уравнений и имеют ряд особенностей при расчете их напряженно-деформированного состояния. Для конструкций такой формы не получено аналитического точного решения, но возможно получить численное решение, например, методом конечных элементов и вариационно-разностным методом. В такой ситуации для верификации расчетов сравнение результатов, полученных при помощи разных численных процедур, полезно и актуально. Проведен сравнительный анализ результатов расчета напряженно-деформированного состояния пластины на криволинейном плане, полученных перечисленными методами. В литературе недостаточно разработана тема расчета пластин и оболочек на криволинейно-трапециевидном плане. Цель исследования - получить данные расчета напряженно-деформированного состояния пластины на криволинейно-трапециевидном плане, а также оценить применимость и особенности двух методов при расчете подобных конструкций. Для выполнения поставленных задач применено программное обеспечение: программный пакет ANSYS APDL для расчета методом конечных элементов, авторская программа SHELLVRM для расчета вариационно-разностным. Получены и проанализированы параметры напряженно-деформированного состояния пластины на криволинейно-трапециевидном плане, произведена верификация полученных результатов, даны рекомендации по внедрению обоих способов расчета в практику анализа конструкций, выявлены вычислительные трудности и особенности обоих методов.</p></trans-abstract><kwd-group xml:lang="en"><kwd>thin elastic plate</kwd><kwd>node mesh</kwd><kwd>VDM</kwd><kwd>FEM</kwd><kwd>stress parameters</kwd><kwd>displacements</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>тонкая упругая пластина</kwd><kwd>сетка узлов</kwd><kwd>ВРМ</kwd><kwd>МКЭ</kwd><kwd>внутренние силовые факторы</kwd><kwd>перемещения</kwd></kwd-group><funding-group/></article-meta><fn-group/></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Krivoshapko SN, Mamieva IA. Analytical surfaces in the architecture of buildings, structures and products. Moscow: URSS; 2025. (In Russ.) 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