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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="abstract" 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">21079</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2019-15-2-117-126</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Numerical methods of structures’  analysis</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Численные методы расчета конструкций</subject></subj-group><subj-group subj-group-type="article-type"><subject>Abstract</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Numerical analysis of the stress-strain state of thin shells based on a joint triangular finite element</article-title><trans-title-group xml:lang="ru"><trans-title>Численный анализ напряженно-деформированного состояния тонких оболочек на основе совместного конечного элемента треугольной формы</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="spin">9436-3693</contrib-id><name-alternatives><name xml:lang="en"><surname>Klochkov</surname><given-names>Yuriy V</given-names></name><name xml:lang="ru"><surname>Клочков</surname><given-names>Юрий Васильевич</given-names></name></name-alternatives><bio xml:lang="en"><p>DSc. in Technical Sciences, Professor, Head of the Higher Mathematics Department, Volgograd State Agricultural University. He published 165 scientific articles, 4 monographs, 4 titles of educational literature</p></bio><bio xml:lang="ru"><p>доктор технических наук, профессор, заведующий кафедрой высшей математики, Волгоградский государственный аграрный университет. Опубликовал 165 научных статей, 4 монографии, 4 наименования учебно-методической литературы</p></bio><email>klotchkov@bk.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="spin">2653-5484</contrib-id><name-alternatives><name xml:lang="en"><surname>Nikolaev</surname><given-names>Anatoliy P</given-names></name><name xml:lang="ru"><surname>Николаев</surname><given-names>Анатолий Петрович</given-names></name></name-alternatives><bio xml:lang="en"><p>DSc. in Technical Sciences, Professor, Professor of the Applied Geodesy, Environmental Engineering and Water Use Department, Volgograd State Agricultural University. He published 149 scientific articles, 6 monographs, 5 titles of educational literature</p></bio><bio xml:lang="ru"><p>доктор технических наук, профессор, профессор кафедры прикладной геодезии, природообустройства и водопользования, Волгоградский государственный аграрный университет. Опубликовал 149 научных статей, 6 монографий, 5 наименований учебно-методической литературы</p></bio><email>anpetr40@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="spin">3593-0159</contrib-id><name-alternatives><name xml:lang="en"><surname>Vakhnina</surname><given-names>Olga V</given-names></name><name xml:lang="ru"><surname>Вахнина</surname><given-names>Ольга Владимировна</given-names></name></name-alternatives><bio xml:lang="en"><p>PhD in Technical Sciences, Associate Professor of Higher Mathematics Department, Volgograd State Agricultural University. She published 47 scientific articles, 1 monograph, 8 titles of educational literature.</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры высшей математики, Волгоградский государственный аграрный университет. Опубликовала 47 научных статей, 1 монографию, 8 наименований учебно-методической литературы</p></bio><email>ovahnina@bk.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Volgograd State Agricultural University</institution></aff><aff><institution xml:lang="ru">Волгоградский государственный аграрный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2019-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2019</year></pub-date><volume>15</volume><issue>2</issue><issue-title xml:lang="en">VOL 15, NO2 (2019)</issue-title><issue-title xml:lang="ru">ТОМ 15, №2 (2019)</issue-title><fpage>117</fpage><lpage>126</lpage><history><date date-type="received" iso-8601-date="2019-05-14"><day>14</day><month>05</month><year>2019</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2019, Klochkov Y.V., Nikolaev A.P., Vakhnina O.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2019, Клочков Ю.В., Николаев А.П., Вахнина О.В.</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="en">Klochkov Y.V., Nikolaev A.P., Vakhnina O.V.</copyright-holder><copyright-holder xml:lang="ru">Клочков Ю.В., Николаев А.П., Вахнина О.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/21079">https://journals.rudn.ru/structural-mechanics/article/view/21079</self-uri><abstract xml:lang="en"><p>Relevance. The use of the finite element method for determining the stressstrain state of thin-walled elements of engineering structures predetermines their discretization into separate finite elements. Splitting irregular parts of the structure is impossible without the use of triangular areas. The triangular elements of shell structures are joint in displacements and in their derivatives only at the nodal points. Therefore, ways to improve the compatibility conditions at the boundaries of triangular elements are relevant. Aims of research. The aim of the work is to improve the compatibility conditions at the boundaries of adjacent triangular elements based on equating the derivatives of normal displacements in the middle of the boundary sides. Methods. In order to improve the compatibility conditions at the boundaries of triangular elements in this work, the Lagrange functional is used with the condition of ensuring equality in the middle of the sides of adjacent elements derived from normal displacements in the directions of perpendiculars tangent to the middle surface of the shell. Results. Using the example of analysing an elliptical shell, the efficiency of using a joint triangular finite element is shown, whose stiffness matrix is formed in accordance with the algorithm outlined in this article.</p></abstract><trans-abstract xml:lang="ru"><p>Актуальность. Использование метода конечных элементов для определения напряженно-деформированного состояния тонкостенных элементов инженерных конструкций предопределяет их дискретизацию на отдельные конечные элементы. Разбиение нерегулярных частей конструкции невозможно без использования треугольных областей. Треугольные элементы оболочечных конструкций являются совместными по перемещениям и по их производным только в узловых точках. Поэтому способы улучшения условий совместности на границах треугольных элементов являются актуальными. Цели. Целью работы является улучшение условий совместности на границах смежных треугольных элементов на основе приравнивания производных нормальных перемещений в серединах граничных сторон. Методы. Для улучшения условий совместности на границах треугольных элементов в настоящей работе используется функционал Лагранжа с условием обеспечения равенства в серединах сторон смежных элементов производных от нормальных перемещений в направлениях перпендикуляров, касательных к срединной поверхности оболочки. Результаты. На примере расчета эллиптической оболочки показана эффективность использования совместного треугольного конечного элемента, матрица жесткости которого формируется в соответствии с алгоритмом, изложенным в статье.</p></trans-abstract><kwd-group xml:lang="en"><kwd>shell construction</kwd><kwd>nodal unknowns</kwd><kwd>triangular finite element</kwd><kwd>Lagrange coefficients</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>оболочечная конструкция</kwd><kwd>узловые неизвестные</kwd><kwd>треугольный конечный элемент</kwd><kwd>множители Лагранжа</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">Krivoshapko S.N., Gbaguidi-Aisse G.L. (2016). Geometry, static, vibration and bucking analysis and applications to thin elliptic paraboloid shells. The Open Construction and Building Technology Journal, 10, 3-28.</mixed-citation><mixed-citation xml:lang="ru">Krivoshapko S.N., Gbaguidi-Aisse G.L. Geometry, static, vibration and bucking analysis and applications to thin elliptic paraboloid shells // The Open Construction and Building Technology Journal. 2016. Vol. 10. Pp. 3-28.</mixed-citation></citation-alternatives></ref><ref id="B2"><label>2.</label><citation-alternatives><mixed-citation xml:lang="en">Krivoshapko S.N., Galishnikova V.V. (2015). Arhitekturno-stroitel’nye konstrukcii: uchebnik dlya akademicheskogo bakalavriata [Architectural and building structures: a textbook for academic undergraduate]. Moscow: Urait Publ., 476. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Кривошапко С.Н., Галишникова В.В. Архитектурно-строительные конструкции: учебник для академического бакалавриата. М.: Юрайт, 2015. 476 с.</mixed-citation></citation-alternatives></ref><ref id="B3"><label>3.</label><citation-alternatives><mixed-citation xml:lang="en">Storozhuk E.A., Chernyshenko I.S., Yatsura A.V. (2018). Stress-Strain State Near a Hole in a Shear-Compliant Composite Cylindrical Shell with Elliptical Cross-Section. International Applied Mechanics, 54(5), 559-567.</mixed-citation><mixed-citation xml:lang="ru">Storozhuk E.A., Chernyshenko I.S., Yatsura A.V. Stress-Strain State Near a Hole in a Shear-Compliant Composite Cylindrical Shell with Elliptical Cross-Section // International Applied Mechanics. 2018. Т. 54. № 5. Pp. 559-567.</mixed-citation></citation-alternatives></ref><ref id="B4"><label>4.</label><citation-alternatives><mixed-citation xml:lang="en">Pyatikrestovskiy K.P., Travush V.I. (2015). O programmirovanii nelineynogo metoda rascheta derevyannyh konstruktsiy [On programming nonlinear method for calculating wooden structures]. Academia. Arhitektura i stroitel’stvo, (2), 115-119. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Пятикрестовский К.П., Травуш В.И. О программировании нелинейного метода расчета деревянных конструкций // Academia. Архитектура и строительство. 2015. № 2. С. 115-119.</mixed-citation></citation-alternatives></ref><ref id="B5"><label>5.</label><citation-alternatives><mixed-citation xml:lang="en">Kim A.Yu., Polnikov S.V. (2016). Sravnenie ehksperimental'nogo i chislennogo issledovaniya bol'sheproletnogo pnevmaticheskogo linzoobraznogo sooruzheniya [Comparison of experimental and numerical studies of largespan pneumatic lenticular structures]. Nauchnoe obozrenie, (15), 36-41. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Ким А.Ю., Полников С.В. Сравнение экспериментального и численного исследования большепролетного пневматического линзообразного сооружения // Научное обозрение. 2016. № 15. С. 36-41.</mixed-citation></citation-alternatives></ref><ref id="B6"><label>6.</label><citation-alternatives><mixed-citation xml:lang="en">Khayrullin F.S., Sakhbiev O.M. (2016). Metod opredeleniya napryazhenno-deformirovannogo sostoyaniya trekhmernykh konstruktsiy slozhnoy formy [The method for determining the stress-strain state of three-dimensional structures of complex shape]. Structural Mechanics of Engineering Constructions and Buildings, (1), 36-42. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Хайруллин Ф.С., Сахбиев О.М. Метод определения напряженно-деформированного состояния трехмерных конструкций сложной формы // Строительная механика инженерных конструкций и сооружений. 2016. № 1. С. 36-42.</mixed-citation></citation-alternatives></ref><ref id="B7"><label>7.</label><citation-alternatives><mixed-citation xml:lang="en">Kayumov R.A. (2016). Bol'shie progiby balok, arok i panelej v uprugoj srede s uchetom deformacij sdviga [Large deflections of beams, arches and panels in an elastic medium with regard to shear deformations]. Dinamicheskie i tekhnologicheskie problemy mekhaniki konstrukcij i sploshnyh sred: materialy XXII Mezhdunarodnogo simpoziuma imeni A.G. Gorshkova, 111-113. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Каюмов Р.А. Большие прогибы балок, арок и панелей в упругой среде с учетом деформаций сдвига // Динамические и технологические проблемы механики конструкций и сплошных сред: материалы XXII Международного симпозиума имени А.Г. Горшкова / Московский авиационный институт (национальный исследовательский университет). 2016. С. 111-113.</mixed-citation></citation-alternatives></ref><ref id="B8"><label>8.</label><citation-alternatives><mixed-citation xml:lang="en">Ignat’ev A.V., Ignat’ev V.A., Gazmatova E.A. (2018). Raschet tonkih plastin po metodu konechnih elementov v forme klassicheskogo smeshannogo metoda s isklyucheniem peremesheniy konechnih elementov kak zhestkogo tselogo [Analysis of thin plates according to the finite element method in the form of the classical mixed method with the exception of the displacements of finite elements as a rigid whole]. Izvestiya visshih uchebnih zavedeniy. Stroitel’stvo, 3(711), 5-13. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Игнатьев А.В., Игнатьев В.А., Гамзатова Е.А. Расчет тонких пластин по методу конечных элементов в форме классического смешанного метода с исключением перемещений конечных элементов как жесткого целого // Известия высших учебных заведений. Строительство. 2018. № 3 (711). С. 5-13.</mixed-citation></citation-alternatives></ref><ref id="B9"><label>9.</label><citation-alternatives><mixed-citation xml:lang="en">Golovanov A.I., Tyuleneva O.N., Shigabutdinov A.F. (2006). Metod konechnih elementov v statike i dinamike tonkostennyh konstruktsiy [The finite element method in statics and dynamics of thin-walled structures]. Moscow: Fizmatlit Publ., 392. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Голованов А.И., Тюленева О.Н., Шигабутдинов А.Ф. Метод конечных элементов в статике и динамике тонкостенных конструкций. М.: Физматлит, 2006. 392 с.</mixed-citation></citation-alternatives></ref><ref id="B10"><label>10.</label><citation-alternatives><mixed-citation xml:lang="en">Zheleznov L.P., Kabanov V.V., Boiko D.V. (2018). Nelineynoye deformirovaniye i ustoychivost' diskretno podkreplennykh ellipticheskikh tsilindricheskikh kompozitnykh obolochek pri kruchenii i vnutrennem davlenii [Nonlinear deformation and stability of discretely supported elliptical cylindrical composite shells under torsion and internal pressure]. Izvestiya vysshikh uchebnykh zavedeniy. Aviatsionnaya tekhnika, (2), 27-34. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Железнов Л.П., Кабанов В.В., Бойко Д.В. Нелинейное деформирование и устойчивость дискретно подкрепленных эллиптических цилиндрических композитных оболочек при кручении и внутреннем давлении // Известия высших учебных заведений. Авиационная техника. 2018. № 2. С. 27-34.</mixed-citation></citation-alternatives></ref><ref id="B11"><label>11.</label><citation-alternatives><mixed-citation xml:lang="en">Sheshenin S.V., Bakhmetev S.G. (2014). Model effektivnogo sloya dlya rezinokordnogo meteriala [Effective layer model for the rubber-cord material]. Vestnik Moskovskogo universiteta. Seriya 1: Matematika. Mekhanika, (5), 41-45. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Шешенин С.В., Бахметьев С.Г. Модель эффективного слоя для резинокордного материала // Вестник Московского университета. Серия 1: Математика. Механика. 2014. № 5. С. 41-45.</mixed-citation></citation-alternatives></ref><ref id="B12"><label>12.</label><citation-alternatives><mixed-citation xml:lang="en">Agapov V.P., Aydemirov K.R. (2016). Raschet ferm metodom konechnyh elementov s uchetom geometricheskoy nelineynosti [Analysis of farms by the method of finite elements taking into account the geometric nonlinearity]. Promyshlennoe i grazhdanskoe stroitel’stvo [Industrial and civil engineering], (11), 4-7. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Агапов В.П., Айдемиров К.Р. Расчет ферм методом конечных элементов с учетом геометрической нелинейности // Промышленное и гражданское строительство. 2016. № 11. С. 4-7.</mixed-citation></citation-alternatives></ref><ref id="B13"><label>13.</label><citation-alternatives><mixed-citation xml:lang="en">Nguyen N., Waas A.M. (2016). Nonlinear, finite deformation, finite element analyses. Z. Angew. Math. and Phys., 67( 9), 35/1-35/24.</mixed-citation><mixed-citation xml:lang="ru">Nguyen N., Waas A.M. Nonlinear, finite deformation, finite element analysis // Z. Angew. Math. Phys. 2016. Vol. 67. No. 9. Pp. 35/1-35/24.</mixed-citation></citation-alternatives></ref><ref id="B14"><label>14.</label><citation-alternatives><mixed-citation xml:lang="en">Lei Z., Gillot F., Jezeguel L. (2015). Developments of the mixed grid isogeometric Reissner - Mindlin shell: serendipity basis and modified reduced quadrature. Int. J. Mech, 54, 105-119.</mixed-citation><mixed-citation xml:lang="ru">Lei Z., Gillot F., Jezeguel L. Developments of the mixed grid isogeometric Reissner - Mindlin shell: serendipity basis and modified reduced quadrature // Int. J. Mech. 2015. Vol. 54. Pp. 105-119.</mixed-citation></citation-alternatives></ref><ref id="B15"><label>15.</label><citation-alternatives><mixed-citation xml:lang="en">Hanslo P., Larson M.G., Larson F. (2015). Tangential differential calculus and the finite element modeling of a large deformation elastic membrane problem. Comput. Mech, 56(1), 87-95.</mixed-citation><mixed-citation xml:lang="ru">Hanslo P., Larson M.G., Larson F. Tangential differential calculus and the finite element modeling of a large deformation elastic membrane problem // Comput. Mech. 2015. Vol. 56. No. 1. Pp. 87-95.</mixed-citation></citation-alternatives></ref><ref id="B16"><label>16.</label><citation-alternatives><mixed-citation xml:lang="en">Yamashita H., Valkeapaa A.I., Jayakumar P., Syqiyama H. (2015). Continuum mechanics based bilinear shear deformable shell element using absolute nodal coordinate formulation. Trans. ASME. J. Comput. and Nonlinear Dyn, 10(5), 051012/1-051012/9.</mixed-citation><mixed-citation xml:lang="ru">Yamashita H., Valkeapaa A.I., Jayakumar P., Syqiyama H. Continuum mechanics based bilinear shear deformable shell element using absolute nodal coordinate formulation // Trans. ASME. J. Comput. and Nonlinear Dyn. 2015. Vol. 10 No. 5. Pp. 051012/1-051012/9.</mixed-citation></citation-alternatives></ref><ref id="B17"><label>17.</label><citation-alternatives><mixed-citation xml:lang="en">Ren H. (2015). Fast and robust full guadrature triangular elements for thin plates/shells, with large deformations and large rotations. Trans. ASME. J. Comput. and Nonlinear Dyn,10(5), 051018/1-051018/13.</mixed-citation><mixed-citation xml:lang="ru">Ren Hui. Fast and robust full quadrature triangular elements for thin plates/shells, with large deformations and large rotations // Trans. ASME. J. Comput. and Nonlinear Dyn. 2015. Vol. 10. No. 5. Pp. 051018/1-051018/13.</mixed-citation></citation-alternatives></ref><ref id="B18"><label>18.</label><citation-alternatives><mixed-citation xml:lang="en">Sartorato M., de Medeiros R., Tita V. (2015). A finite element formulation for smart piezollectric composite shells: mathematical formulation, computational analysis and experimental evaluation. Compos. Struct., (127), 185-198.</mixed-citation><mixed-citation xml:lang="ru">Sartorato M., de Medeiros R., Tita V. A finite element formulation for smart piezollectric composite shells: mathematical formulation, computational analysis and experimental evaluation // Compos. Struct. 2015. 127. Pp. 185-198.</mixed-citation></citation-alternatives></ref><ref id="B19"><label>19.</label><citation-alternatives><mixed-citation xml:lang="en">Pogorelov A.V. (1974). Differencial'naja geometrija [Differential geometry]. M.: Nauka Publ., 176. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Погорелов А.В. Дифференциальная геометрия. М.: Наука, 1974. 176 с.</mixed-citation></citation-alternatives></ref><ref id="B20"><label>20.</label><citation-alternatives><mixed-citation xml:lang="en">Sedov L.I. (1976). Mekhanika sploshnoy sredy [Continuum mechanics]. M.: Nauka Publ., 574. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Седов Л.И. Механика сплошной среды. М.: Наука, 1976. 574 с.</mixed-citation></citation-alternatives></ref><ref id="B21"><label>21.</label><citation-alternatives><mixed-citation xml:lang="en">Klochkov Y.V., Nikolaev A.P., Kiseleva T.A., Marchenko S.S. (2016). Comparative analysis of the results of finite element calculations based on an ellipsoidal shell. Journal of machinery manufacture and reliability, 45(4), 328-336.</mixed-citation><mixed-citation xml:lang="ru">Klochkov Y.V., Nikolaev A.P., Kiseleva T.A., Marchenko S.S. Comparative analysis of the results of finite element calculations based on an ellipsoidal shell // Journal of machinery manufacture and reliability. 2016. Vol. 45. No. 4. Pp. 328-336.</mixed-citation></citation-alternatives></ref></ref-list></back></article>
