<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE root>
<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">32746</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2022-18-4-375-386</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">Comparative analysis of the stress state of an equal slope shell by analytical and numerical methods</article-title><trans-title-group xml:lang="ru"><trans-title>Сравнительный анализ напряженного состояния оболочки одинакового ската аналитическим и численными методами</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8832-6790</contrib-id><name-alternatives><name xml:lang="en"><surname>Aleshina</surname><given-names>Olga O.</given-names></name><name xml:lang="ru"><surname>Алёшина</surname><given-names>Ольга Олеговна</given-names></name></name-alternatives><bio xml:lang="en"><p>PhD, Assistant, Department of Civil Engineering, Academy of Engineering</p></bio><bio xml:lang="ru"><p>кандидат технических наук, ассистент, департамент строительства, Инженерная академия</p></bio><email>xiaofeng@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4023-156X</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-Tutor, Department of Civil Engineering, Academy of Engineering</p></bio><bio xml:lang="ru"><p>доктор технических наук, профессор-консультант, департамент строительства, 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/0000-0001-8796-4635</contrib-id><name-alternatives><name xml:lang="en"><surname>Cajamarca-Zuniga</surname><given-names>David</given-names></name><name xml:lang="ru"><surname>Кахамарка-Сунига</surname><given-names>Давид</given-names></name></name-alternatives><bio xml:lang="en"><p>Docent of the Department of Civil Engineering</p></bio><bio xml:lang="ru"><p>доцент департамента строительства</p></bio><email>cajamarca.zuniga@gmail.com</email><xref ref-type="aff" rid="aff2"/></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><aff-alternatives id="aff2"><aff><institution xml:lang="en">Catholic University of Cuenca</institution></aff><aff><institution xml:lang="ru">Католический университет города Куэнки</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-11-30" publication-format="electronic"><day>30</day><month>11</month><year>2022</year></pub-date><volume>18</volume><issue>4</issue><issue-title xml:lang="en">VOL 18, NO4 (2022)</issue-title><issue-title xml:lang="ru">ТОМ 18, №4 (2022)</issue-title><fpage>375</fpage><lpage>386</lpage><history><date date-type="received" iso-8601-date="2022-11-30"><day>30</day><month>11</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Aleshina O.O., Ivanov V.N., Cajamarca-Zuniga D.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Алёшина О.О., Иванов В.Н., Кахамарка-Сунига Д.</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Aleshina O.O., Ivanov V.N., Cajamarca-Zuniga D.</copyright-holder><copyright-holder xml:lang="ru">Алёшина О.О., Иванов В.Н., Кахамарка-Сунига Д.</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/32746">https://journals.rudn.ru/structural-mechanics/article/view/32746</self-uri><abstract xml:lang="en"><p style="text-align: justify;">Works on the study of the stress-strain state of the shell of an equal slope with an ellipse at the base have not been widely performed. The present paper is a part of a series of articles on the analysis of the geometry and stress state of torses of an equal slope with a directrix ellipse by various methods under different loads and support conditions. The derivation of the differential equations of equilibrium of the momentless theory of shells for determining internal forces in the torse with a directrix ellipse under the action of internal pressure is presented. The analytical results are compared with results obtained by the finite element method (FEM) and the variational difference method (VDM). The advantages and disadvantages of three calculation methods are determined, and it is established that VDM results are more accurate compared to FEM, but FEM-based software is a more powerful tool to perform the structural analysis.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Исследование напряженно-деформированного состояния оболочки одинакового ската с эллипсом в основании не получило широкого распространения. Настоящая работа является частью серии статей, посвященных анализу геометрии и напряженного состояния торсов одинакового ската с направляющим эллипсом различными методами при различных нагрузках и условиях опирания. Представлен вывод дифференциальных уравнений равновесия безмоментной теории оболочек для определения внутренних сил в торсе с направляющим эллипсом под действием внутреннего давления. Аналитические результаты сравниваются с результатами, полученными методом конечных элементов (МКЭ) и вариационно-разностным методом (ВРМ). Определены преимущества и недостатки трех методов расчета и установлено, что результаты ВРМ точнее по сравнению с МКЭ, но программное обеспечение на основе МКЭ является более мощным инструментом для выполнения расчета конструкции.</p></trans-abstract><kwd-group xml:lang="en"><kwd>thin shell theory</kwd><kwd>analytical method</kwd><kwd>momentless state</kwd><kwd>torse shell</kwd><kwd>surface of equal slope</kwd><kwd>finite element method</kwd><kwd>variational-difference method</kwd><kwd>SCAD Office</kwd><kwd>computing system</kwd><kwd>Mathcad system</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>теория тонких оболочек</kwd><kwd>аналитическое решение</kwd><kwd>безмоментное состояние</kwd><kwd>торсовая оболочка</kwd><kwd>поверхность одинакового ската</kwd><kwd>метод конечных элементов</kwd><kwd>вариационно-разностный метод</kwd><kwd>SCAD Office</kwd><kwd>вычислительный комплекс</kwd><kwd>система Mathcad</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">Ivanov V.N., Alyoshina O.О. Comparative analysis of the stress-strain state’s parameters of equal slope shell with the director ellipse using three calculation methods. Structural Mechanics and Analysis of Constructions. 2020;(3):37-46. (In Russ.) https://doi.org/10.37538/0039-2383.2020.3.37.46</mixed-citation><mixed-citation xml:lang="ru">Иванов В.Н., Алёшина О.О. Сравнительный анализ параметров напряженно-деформированного состояния торса с направляющим эллипсом с помощью трех методов расчета // Строительная механика и расчет сооружений. 2020. № 3 (290). С. 37–46. https://doi.org/10.37538/0039-2383.2020.3.37.46.</mixed-citation></citation-alternatives></ref><ref id="B2"><label>2.</label><citation-alternatives><mixed-citation xml:lang="en">Aleshina O.O., Ivanov V.N., Cajamarca-Zuniga D. Stress state analysis of an equal slope shell under uniformly distributed tangential load by different methods. Structural Mechanics of Engineering Constructions and Buildings. 2021;17(1):51-62. https://doi.org/10.22363/1815-5235-2021-17-1-51-62</mixed-citation><mixed-citation xml:lang="ru">Aleshina O.O., Ivanov V.N., Cajamarca-Zuniga D. Stress state analysis of an equal slope shell under uniformly distributed tangential load by different methods // Structural Mechanics of Engineering Constructions and Buildings. 2021. Vol. 17. No. 1. Pp. 51–62. https://doi.org/10.22363/1815-5235-2021-17-1-51-62</mixed-citation></citation-alternatives></ref><ref id="B3"><label>3.</label><citation-alternatives><mixed-citation xml:lang="en">Aleshina O.O., Ivanov V.N., Grinko E.A. Investigation of the equal slope shell stress state by analytical and two numerical methods. Structural Mechanics and Analysis of Constructions. 2020;(6):2-13. (In Russ.) https://doi.org/10.37538/0039-2383.2020.6.2.13</mixed-citation><mixed-citation xml:lang="ru">Алёшина О.О., Иванов В.Н., Гринько Е.А. Исследование напряженного состояния торсовой оболочки одинакового ската аналитическим и численными методами // Строительная механика и расчет сооружений. 2020. № 6 (293). С. 2–13. https://doi.org/10.37538/0039-2383.2020.6.2.13</mixed-citation></citation-alternatives></ref><ref id="B4"><label>4.</label><citation-alternatives><mixed-citation xml:lang="en">Ivanov V.N., Alyoshina O.O. Comparative analysis of the results of determining the parameters of the stress-strain state of equal slope shell. Structural Mechanics of Engineering Constructions and Buildings. 2019;15(5):374-383. (In Russ.) https://doi.org/10.22363/1815-5235-2019-15-5-374-383</mixed-citation><mixed-citation xml:lang="ru">Иванов В.Н., Алёшина О.О. Сравнительный анализ результатов определения параметров напряженно-деформированного состояния оболочки одинакового ската с направляющим эллипсом в основании // Строительная механика инженерных конструкций и сооружений. 2019. Т. 15. № 5. С. 374–383. https://doi.org/10.22363/1815-5235-2019-15-5-374-383</mixed-citation></citation-alternatives></ref><ref id="B5"><label>5.</label><citation-alternatives><mixed-citation xml:lang="en">Aleshina O.O. New investigation of the stress-strain state of the torso-shaped awning. International Conference Scientific Research of the SCO Countries: Synergy and Integration. Beijin: Infinity; 2020. p. 130-136. https://doi.org/10.34660/INF.2020.26.58262</mixed-citation><mixed-citation xml:lang="ru">Aleshina O.O. New investigation of the stress-strain state of the torso-shaped awning // International Conference Scientific Research of the SCO Countries: Synergy and Integration. Beijin: Infinity, 2020. Pp. 130–136. https://doi.org/10.34660/INF.2020.26.58262</mixed-citation></citation-alternatives></ref><ref id="B6"><label>6.</label><citation-alternatives><mixed-citation xml:lang="en">Aleshina O.O. Studies of geometry and calculation of torso shells of an equal slope. Structural Mechanics and Analysis of Constructions. 2019;(3):63-70. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Алёшина О.О. Исследования по геометрии и расчету торсовых оболочек одинакового ската // Строительная механика и расчет сооружений. 2019. № 3 (284). С. 63–70.</mixed-citation></citation-alternatives></ref><ref id="B7"><label>7.</label><citation-alternatives><mixed-citation xml:lang="en">Alyoshina O.О. Definition of the law of setting closed curves torso shells of the equal slope. Engineering Systems - 2020: Proceedings of the Scientific and Practical Conference with International Participation (Moscow, 14-16 October 2020) (vol. 1). Moscow; 2020. p. 22-30. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Алёшина О.О. Определение закона задания замкнутых кривых торсовых оболочек одинакового ската // Инженерные системы – 2020: труды научно-практической конференции с международным участием, посвященной 60-летию Российского университета дружбы народов (Москва, 14–16 октября 2020 г.): в 2 т. Т. 1. М., 2020. С. 22–30.</mixed-citation></citation-alternatives></ref><ref id="B8"><label>8.</label><citation-alternatives><mixed-citation xml:lang="en">Zhou F.-X. A constant slope surface and its application. 2022 3rd International Conference on Geology, Mapping and Remote Sensing. IEEE; 2022. p. 78-81. https://doi.org/10.1109/ICGMRS55602.2022.9849334</mixed-citation><mixed-citation xml:lang="ru">Zhou F.-X. A constant slope surface and its application // 2022 3rd International Conference on Geology, Mapping and Remote Sensing. IEEE, 2022. Рр. 78–81. https://doi.org/10.1109/ICGMRS55602.2022.9849334</mixed-citation></citation-alternatives></ref><ref id="B9"><label>9.</label><citation-alternatives><mixed-citation xml:lang="en">Krivoshapko S.N., Timoshin М.А. Static analysis of a torse shell of equal slope with a director ellipse. Structural Mechanics of Engineering Constructions and Buildings. 2008;(1):3-10. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Кривошапко С.Н., Тимошин М.А. Статический расчет торсовой оболочки одинакового ската с направляющим эллипсом // Строительная механика инженерных конструкций и сооружений. 2008. № 1. С. 3–10.</mixed-citation></citation-alternatives></ref><ref id="B10"><label>10.</label><citation-alternatives><mixed-citation xml:lang="en">Hu Jian-guo, Chen Yue-ping. Mathematical model of the identical slope surface. Wuhan University Journal of Natural Sciences. 2002;7:54-58. https://doi.org/10.1007/BF02830014</mixed-citation><mixed-citation xml:lang="ru">Hu Jian-guo, Chen Yue-ping. Mathematical model of the identical slope surface // Wuhan University Journal of Natural Sciences. 2002. Vol. 7. Pp. 54–58. https://doi.org/10.1007/BF02830014</mixed-citation></citation-alternatives></ref><ref id="B11"><label>11.</label><citation-alternatives><mixed-citation xml:lang="en">Krivoshapko S.N. Geometry of ruled surfaces with cuspidal edge and linear theory of analysis of torse shells. Moscow; 2009. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Кривошапко С.Н. Геометрия линейчатых поверхностей с ребром возврата и линейная теория расчета торсовых оболочек. М.: РУДН, 2009. 358 с.</mixed-citation></citation-alternatives></ref><ref id="B12"><label>12.</label><citation-alternatives><mixed-citation xml:lang="en">Klochkov Y.V., Vakhinina O.V., Kiseleva T.A. Calculation of thin shells on the basis of the triangular final element with the correcting Lagrange’s coefficients. Structural Mechanics of Engineering Constructions and Buildings. 2015;(5):55-59. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Клочков Ю.В., Вахнина О.В., Киселева Т.А. Расчет тонких оболочек на основе треугольного конечного элемента с корректирующими множителями Лагранжа // Строительная механика инженерных конструкций и сооружений. 2015. № 5. С. 55–59.</mixed-citation></citation-alternatives></ref><ref id="B13"><label>13.</label><citation-alternatives><mixed-citation xml:lang="en">Klochkov Y.V., Nikolaev A.P., Ishchanov T.R., Andreev A.S., Klochkov M.Y. Accounting for geometric nonlinearity in finite element strength calculations of thin-walled shell-type structures. Structural Mechanics of Engineering Constructions and Buildings. 2020;16(1):31-37. (In Russ.) https://doi.org/10.22363/1815-5235-2020-16-1-31-37</mixed-citation><mixed-citation xml:lang="ru">Клочков Ю.В., Николаев А.П., Ищанов Т.Р., Андреев А.С., Клочков М.Ю. Учет геометрической нелинейности в конечно-элементных прочностных расчетах тонкостенных конструкций типа оболочек // Строительная механика инженерных конструкций и сооружений. 2020. Т. 16. № 1. С. 31–37. https://doi.org/10.22363/1815-5235-2020-16-1-31-37</mixed-citation></citation-alternatives></ref><ref id="B14"><label>14.</label><citation-alternatives><mixed-citation xml:lang="en">Ivanov V.N. Fundamentals of the finite element method and the variational-difference method. Moscow: RUDN University; 2008. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Иванов В.Н. Основы метода конечных элементов и вариационно-разностного метода. M.: РУДН, 2008. 168 с.</mixed-citation></citation-alternatives></ref><ref id="B15"><label>15.</label><citation-alternatives><mixed-citation xml:lang="en">Maksimyuk V.A., Storozhuk E.A., Chernyshenko I.S. Variational finite-difference methods in linear and nonlinear problems of the deformation of metallic and composite shells. International Applied Mechanics. 2012;48(6):613-687. https://doi.org/10.1007/s10778-012-0544-8</mixed-citation><mixed-citation xml:lang="ru">Maksimyuk V.A., Storozhuk E.A., Chernyshenko I.S. Variational finite-difference methods in linear and nonlinear problems of the deformation of metallic and composite shells // International Applied Mechanics. 2012. Vol. 48. No. 6. Pp. 613–687. https://doi.org/10.1007/s10778-012-0544-8</mixed-citation></citation-alternatives></ref><ref id="B16"><label>16.</label><citation-alternatives><mixed-citation xml:lang="en">Govind P.L. Complicated features and their solution in analysis of thin shell and plate structures. Structural Mechanics of Engineering Constructions and Buildings. 2018;14(6):509-515. https://doi.org/10.22363/1815-5235-2018-14-6-509-515</mixed-citation><mixed-citation xml:lang="ru">Govind P.L. Complicated features and their solution in analysis of thin shell and plate structures // Structural Mechanics of Engineering Constructions and Buildings. 2018. Vol. 14. No. 6. Pp. 509–515. https://doi.org/10.22363/1815-5235-2018-14-6-509-515</mixed-citation></citation-alternatives></ref><ref id="B17"><label>17.</label><citation-alternatives><mixed-citation xml:lang="en">Ivanov V.N., Rynkovskaya M.I. Analysis of thin walled wavy shell of Monge type surface with parabola and sinusoid curves by variational-difference method. MATEC Web of Conferences, Shanghai, 21-23 October 2016. 2017;95:12007. https://doi.org/10.1051/matecconf/20179512007</mixed-citation><mixed-citation xml:lang="ru">Ivanov V.N., Rynkovskaya M.I. Analysis of thin walled wavy shell of Monge type surface with parabola and sinusoid curves by variational-difference method // MATEC Web of Conferences, Shanghai, 21–23 October 2016. 2017. Vol. 95. Article 12007. https://doi.org/10.1051/matecconf/20179512007</mixed-citation></citation-alternatives></ref><ref id="B18"><label>18.</label><citation-alternatives><mixed-citation xml:lang="en">Barve V.D., Dey S.S. Isoparametric finite difference energy method for plate bending problems. Computers and Structures. 1983;17(3):459-465. https://doi.org/10.1016/0045-7949(83)90137-2</mixed-citation><mixed-citation xml:lang="ru">Barve V.D., Dey S.S. Isoparametric finite difference energy method for plate bending problems // Computers and Structures. 1983. Vol. 17. Issue 3. Рр. 459–465. https://doi.org/10.1016/0045-7949(83)90137-2</mixed-citation></citation-alternatives></ref><ref id="B19"><label>19.</label><citation-alternatives><mixed-citation xml:lang="en">Bushnell D., Almroth B.O., Brogan F. Finite-difference energy method for nonlinear shell analysis. Computers and Structures. 1971;1(3):361-387. https://doi.org/10.1016/0045-7949(71)90020-4</mixed-citation><mixed-citation xml:lang="ru">Bushnell D., Almroth B.O., Brogan F. Finite-difference energy method for nonlinear shell analysis // Computers and Structures. 1971. Vol. 1. Issue 3. Рр. 361–387. https://doi.org/10.1016/0045-7949(71)90020-4</mixed-citation></citation-alternatives></ref><ref id="B20"><label>20.</label><citation-alternatives><mixed-citation xml:lang="en">Ihlenburg F.F. Plate bending analysis with variational finite difference methods on general grid. Computers and Structures. 1993;48(1):141-151. https://doi.org/10.1016/0045-7949(93)90465-P</mixed-citation><mixed-citation xml:lang="ru">Ihlenburg F.F. Plate bending analysis with variational finite difference methods on general grid // Computers and Structures. 1993.Vol. 48. Issue 1. Рр. 141–151. https://doi.org/10.1016/0045-7949(93)90465-P</mixed-citation></citation-alternatives></ref><ref id="B21"><label>21.</label><citation-alternatives><mixed-citation xml:lang="en">Ivanov V.N., Krivoshapko S.N. Analytical methods for calculating shells of non-canonical form. Moscow; 2010. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Иванов В.Н., Кривошапко С.Н. Аналитические методы расчета оболочек неканонической формы. М.: РУДН, 2010. 542 с.</mixed-citation></citation-alternatives></ref><ref id="B22"><label>22.</label><citation-alternatives><mixed-citation xml:lang="en">Courant R. Variational methods for the solution of problems of equilibrium and vibrations. Bulletin of the American Mathematical Society. 1943;49(1):1-23.</mixed-citation><mixed-citation xml:lang="ru">Courant R. Variational methods for the solution of problems of equilibrium and vibrations // Bulletin of the American Mathematical Society. 1943. Vol. 49. Issue 1. Рр. 1–23.</mixed-citation></citation-alternatives></ref><ref id="B23"><label>23.</label><citation-alternatives><mixed-citation xml:lang="en">Mikhlin S.G. Variational-difference approximation. Journal of Soviet Mathematics. 1978;10(5):661-787. https://doi.org/10.1007/BF01083968</mixed-citation><mixed-citation xml:lang="ru">Mikhlin S.G. Variational-difference approximation // Journal of Soviet Mathematics. 1978. Vol. 10. Issue 5. Рр. 661–787. https://doi.org/10.1007/BF01083968</mixed-citation></citation-alternatives></ref><ref id="B24"><label>24.</label><citation-alternatives><mixed-citation xml:lang="en">Zhong H., Yu T. A weak form quadrature element method for plane elasticity problems. Applied Mathematical Modelling. 2009;33(10):3801-3814. https://doi.org/1016/j.apm.2008.12.007</mixed-citation><mixed-citation xml:lang="ru">Zhong H., Yu T. A weak form quadrature element method for plane elasticity problems // Applied Mathematical Modelling. 2009. Vol. 33. Issue 10. Рр. 3801–3814. https://doi.org/10.1016/j.apm.2008.12.007</mixed-citation></citation-alternatives></ref><ref id="B25"><label>25.</label><citation-alternatives><mixed-citation xml:lang="en">Griffin D.S., Varga R.S. Numerical solution of plane elasticity problems. Journal of the Society for Industrial and Applied Mathematics. 1963;11(4):1046-1062.</mixed-citation><mixed-citation xml:lang="ru">Griffin D.S., Varga R.S. Numerical solution of plane elasticity problems // Journal of the Society for Industrial and Applied Mathematics. 1963. Vol. 11. Issue 4. Рр. 1046–1062.</mixed-citation></citation-alternatives></ref><ref id="B26"><label>26.</label><citation-alternatives><mixed-citation xml:lang="en">Brush D.O., Almroth B.O. Buckling of bars, plates, and shells. New York: McGraw-Hill; 1975.</mixed-citation><mixed-citation xml:lang="ru">Brush D.O., Almroth B.O. Buckling of bars, plates, and shells. New York: McGraw-Hill, 1975. 379 p.</mixed-citation></citation-alternatives></ref><ref id="B27"><label>27.</label><citation-alternatives><mixed-citation xml:lang="en">Ivanov V.N., Lamichane G.P. Compound space constructions. Engineering Systems - 2020: Proceedings of the Scientific and Practical Conference with International Participation (Moscow, 14-16 October 2020) (vol. 1). Moscow; 2020. p. 31-39. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Иванов В.Н., Ламичхане Г.П. Комбинированные пространственные конструкции // Инженерные системы – 2020: труды научно-практической конференции с международным участием, посвященной 60-летию Российского университета дружбы народов (Москва, 14–16 октября 2020 г.): в 2 т. Т. 1. М., 2020. С. 31–39.</mixed-citation></citation-alternatives></ref><ref id="B28"><label>28.</label><citation-alternatives><mixed-citation xml:lang="en">Krivoshapko S.N., Ivanov V.N. Encyclopedia of analytical surfaces. Springer; 2015.</mixed-citation><mixed-citation xml:lang="ru">Krivoshapko S.N., Ivanov V.N. Encyclopedia of analytical surfaces. Springer, 2015.</mixed-citation></citation-alternatives></ref><ref id="B29"><label>29.</label><citation-alternatives><mixed-citation xml:lang="en">Krivoshapko S.N. Perspectives and Advantages of tangential developable surfaces in modeling machine-building and building designs. Bulletin of Civil Engineers. 2019;16(1)20-30. (In Russ.) https://doi.org/10.23968/1999-5571-2019-16-1-20-30</mixed-citation><mixed-citation xml:lang="ru">Кривошапко С.Н. Перспективы и преимущества торсовых поверхностей при моделировании машиностроительных и строительных конструкций // Вестник гражданских инженеров. 2019. № 1 (72). С. 20–30. https://doi.org/10.23968/1999-5571-2019-16-1-20-30</mixed-citation></citation-alternatives></ref><ref id="B30"><label>30.</label><citation-alternatives><mixed-citation xml:lang="en">Krivoshapko S.N. The application, geometrical and strength researches of torse shells: the review of works published after 2008. Structural Mechanics and Analysis of Constructions. 2018;(2):19-25. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Кривошапко С.Н. Применение, геометрические и прочностные исследования торсовых оболочек: обзор работ, опубликованных после 2008 г. // Строительная механика и расчет сооружений. 2018. № 2 (277). С. 19–25.</mixed-citation></citation-alternatives></ref></ref-list></back></article>
