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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">46169</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2025-21-3-216-230</article-id><article-id pub-id-type="edn">SXAGEC</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Analytical and numerical methods of analysis of structures</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Аналитические и численные методы расчета конструкций</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">Optimization of Section Parameters of Finite Stiffness Cable Under Transverse Impact</article-title><trans-title-group xml:lang="ru"><trans-title>Оптимизация параметров профиля нити конечной жесткости при поперечном ударе</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7685-0325</contrib-id><contrib-id contrib-id-type="spin">7690-5877</contrib-id><name-alternatives><name xml:lang="en"><surname>Tarasov</surname><given-names>Denis A.</given-names></name><name xml:lang="ru"><surname>Тарасов</surname><given-names>Денис Александрович</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Technical Sciences, Associate Professor of the Department of Automation and Control</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры автоматизации и управления</p></bio><email>tda82@list.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Penza State Technological University</institution></aff><aff><institution xml:lang="ru">Пензенский государственный технологический университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-09-09" publication-format="electronic"><day>09</day><month>09</month><year>2025</year></pub-date><volume>21</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>216</fpage><lpage>230</lpage><history><date date-type="received" iso-8601-date="2025-09-29"><day>29</day><month>09</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Tarasov D.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Тарасов Д.А.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Tarasov D.A.</copyright-holder><copyright-holder xml:lang="ru">Тарасов Д.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/">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/46169">https://journals.rudn.ru/structural-mechanics/article/view/46169</self-uri><abstract xml:lang="en"><p>A cable of finite stiffness is a model for a wide range of load-bearing structures, such as large-span suspended roofs of public and industrial buildings. At the same time, a new class of engineering structures has appeared relatively recently, designed to create an insurmountable physical obstacle to unauthorized movement of vehicles. The main elements that ensure the overall strength and rigidity of such structures are ring-shaped steel sections, which resist lateral impact. In this regard, there is a need to solve problems of optimal design of these elements. The objective of this study is to create a method that allows setting and solving the designated problems. The developed method is based on single-criterion multiparameter conditional optimization, the Bubnov-Galerkin method, as well as integral and differential calculus of multivariate functions. Verification of the proposed modeling technology is carried out. Discrepancies in the values of the adopted criteria for assessing the accuracy of the obtained results stay within the permissible errors in solving engineering problems. Using the developed method, the studies were conducted and the influence of the ratio of the internal to external diameter of the ring section on the weight and size characteristics, as well as the behavior of the bending-rigid cable under the action of a short-term dynamic load was revealed.</p></abstract><trans-abstract xml:lang="ru"><p>Нить конечной жесткости является расчетной моделью для широкого круга несущих конструкций, например большепролетных висячих покрытий общественных и промышленных зданий. Вместе с тем сравнительно недавно появился новый класс инженерных сооружений, предназначенных для создания непреодолимого физического препятствия несанкционированному продвижению автотранспортных средств. Основными элементами, обеспечивающими общую прочность и жесткость конструкций подобных сооружений, являются стальные профили с сечением в виде кольца, работающие по восприятию поперечного удара. В связи с этим возникает потребность в решении задач оптимального проектирования указанных элементов. Цель исследования - создание метода, позволяющего ставить и решать обозначенные задачи. В основу разработанного метода положена однокритериальная многопараметрическая условная оптимизация, метод Бубнова - Галеркина, а также интегральное и дифференциальное исчисление функций нескольких переменных. Проведена верификация предложенной технологии моделирования. Расхождения в значениях принятых критериев оценки истинности получаемых результатов укладываются в допустимые погрешности решения инженерных задач. С помощью созданного метода проведены исследования и выявлено влияние соотношения внутреннего к внешнему диаметру кольцевого профиля на массогабаритные характеристики, а также поведение изгибно-жесткой нити под действием кратковременной динамической нагрузки.</p></trans-abstract><kwd-group xml:lang="en"><kwd>calculation according to deformed shape</kwd><kwd>geometric nonlinearity</kwd><kwd>inverse problem</kwd><kwd>conditional optimization</kwd><kwd>nonlinear programming</kwd><kwd>dynamic load</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>расчет по деформированной схеме</kwd><kwd>геометрическая нелинейность</kwd><kwd>обратная задача</kwd><kwd>условная оптимизация</kwd><kwd>нелинейное программирование</kwd><kwd>динамическая нагрузка</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">Mei L., Wang Q. 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