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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">26185</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2021-17-1-42-50</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Geometrical investigations of middle surfaces of shells</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Геометрия срединных поверхностей 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">Modeling and visualizing of the formation of a snub dodecahedron in the AutoCAD system</article-title><trans-title-group xml:lang="ru"><trans-title>Моделирование и визуализация образования плосконосого додекаэдра в системе AutoCAD</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Romanova</surname><given-names>Victoryna A.</given-names></name><name xml:lang="ru"><surname>Романова</surname><given-names>Викторина Анатольевна</given-names></name></name-alternatives><bio xml:lang="en"><p>Associate Professor of the Department of Civil Engineering of the Academy of Engineering</p></bio><bio xml:lang="ru"><p>доцент департамента строительства Инженерной академии</p></bio><email>v.a.r-victoryna@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Strashnov</surname><given-names>Stanislav V.</given-names></name><name xml:lang="ru"><surname>Страшнов</surname><given-names>Станислав Викторович</given-names></name></name-alternatives><bio xml:lang="en"><p>Associate Professor of the Department of General Education Courses of the Faculty of Russian Language and General Educational Disciplines</p></bio><bio xml:lang="ru"><p>доцент кафедры общеобразовательных дисциплин факультета русского языка и общеобразовательных дисциплин, кандидат технических наук</p></bio><email>v.a.r-victoryna@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="2021-04-02" publication-format="electronic"><day>02</day><month>04</month><year>2021</year></pub-date><volume>17</volume><issue>1</issue><issue-title xml:lang="en">VOL 17, NO1 (2021)</issue-title><issue-title xml:lang="ru">ТОМ 17, №1 (2021)</issue-title><fpage>42</fpage><lpage>50</lpage><history><date date-type="received" iso-8601-date="2021-04-02"><day>02</day><month>04</month><year>2021</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2021, Romanova V.A., Strashnov S.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2021, Романова В.А., Страшнов С.В.</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="en">Romanova V.A., Strashnov S.V.</copyright-holder><copyright-holder xml:lang="ru">Романова В.А., Страшнов С.В.</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/26185">https://journals.rudn.ru/structural-mechanics/article/view/26185</self-uri><abstract xml:lang="en"><p style="text-align: justify;">The article is devoted to modeling and visualization of the formation of flat-nosed (snub-nosed) dodecahedron (snub dodecahedron). The purpose of the research is to model the snub dodecahedron (flat-nosed dodecahedron) and visualize the process of its formation. The formation of the faces of the flat-nosed dodecahedron consists in the truncation of the edges and vertices of the Platonic dodecahedron with the subsequent rotation of the new faces around their centers. The values of the truncation of the dodecahedron edges, the angle of rotation of the faces and the length of the edge of the flat-nosed dodecahedron are the parameters of three equations composed as the distances between the vertices of triangles located between the faces of the snub dodecahedron. The solution of these equations was carried out by the method of successive approximations. The results of the calculations were used to create an electronic model of the flat-nosed dodecahedron and visualize its formation. The task was generally achieved in the AutoCAD system using programs in the AutoLISP language. Software has been created for calculating the parameters of modeling a snub dodecahedron and visualizing its formation.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Статья посвящена моделированию и визуализации образования плосконосого (курносого) додекаэдра на базе додекаэдра Платона. Цели исследования - расчет параметров усечения додекаэдра для определения величины ребра плосконосого додекаэдра, моделирование и визуализация процесса его формирования. Образование граней плосконосого додекаэдра состоит в усечении ребер и вершин додекаэдра Платона с последующим поворотом новых граней вокруг их центров. Величины усечения ребер додекаэдра, угла поворота граней и длины ребра плосконосого додекаэдра - параметры трех уравнений, составленных как расстояния между вершинами треугольников, расположенных между гранями курносого додекаэдра. Решение указанных уравнений выполнялось методом последовательных приближений. Результаты вычислений использовались для создания электронной модели плосконосого додекаэдра и визуализации ее образования. Решение поставленной задачи в целом осуществлялось в системе AutoCAD с использованием программы на языке AutoLISP. Создано программное обеспечение для расчета параметров моделирования плосконосого додекаэдра и визуализации его формирования.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Archimedean solids</kwd><kwd>Platonic solids</kwd><kwd>flat-nosed dodecahedron</kwd><kwd>snub dodecahedron</kwd><kwd>rhomboicosododecahedron</kwd><kwd>semi-regular polyhedron</kwd><kwd>edge</kwd><kwd>vertice</kwd><kwd>AutoCAD</kwd><kwd>AutoLISP</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>AutoCAD</kwd><kwd>AutoLISP</kwd><kwd>тела Архимеда</kwd><kwd>тела Платона</kwd><kwd>плосконосый додекаэдр</kwd><kwd>курносый додекаэдр</kwd><kwd>ромбоикосододекаэдр</kwd><kwd>полуправильные многогранники</kwd><kwd>ребро</kwd><kwd>вершина</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">Kiper G. Polyhedra. A historical review. Ankara; 2007.</mixed-citation><mixed-citation xml:lang="ru">Kiper G. Polyhedra. 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