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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">donstu</journal-id><journal-title-group><journal-title xml:lang="en">Advanced Engineering Research (Rostov-on-Don)</journal-title><trans-title-group xml:lang="ru"><trans-title>Advanced Engineering Research (Rostov-on-Don)</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2687-1653</issn><publisher><publisher-name>Don State Technical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.12737/16075</article-id><article-id custom-type="elpub" pub-id-type="custom">donstu-37</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MECHANICS</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>МЕХАНИКА</subject></subj-group></article-categories><title-group><article-title>Modeling of three-dimensional elastic strain fields by point-source method</article-title><trans-title-group xml:lang="ru"><trans-title>Моделирование трехмерных полей упругих деформаций с помощью метода точечных источников</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Князев</surname><given-names>Сергей Юрьевич</given-names></name><name name-style="western" xml:lang="en"><surname>Knyazev</surname><given-names>Sergey Yu.</given-names></name></name-alternatives><email xlink:type="simple">ksy@donpac.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пустовойт</surname><given-names>Виктор Николаевич</given-names></name><name name-style="western" xml:lang="en"><surname>Pustovoyt</surname><given-names>Victor N.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Щербакова</surname><given-names>Елена Евгеньевна</given-names></name><name name-style="western" xml:lang="en"><surname>Shcherbakova</surname><given-names>Elena E.</given-names></name></name-alternatives><email xlink:type="simple">Sherbakovaee@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Щербаков</surname><given-names>Антон Андреевич</given-names></name><name name-style="western" xml:lang="en"><surname>Shcherbakov</surname><given-names>Anton A.</given-names></name></name-alternatives><email xlink:type="simple">AnSherbakov@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Донской государственный технический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Don State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Новочеркасский электровозостроительный завод (НЭВЗ)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Novocherkassk Electric Locomotive Plant (NEVZ)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2015</year></pub-date><pub-date pub-type="epub"><day>30</day><month>12</month><year>2015</year></pub-date><volume>15</volume><issue>4</issue><fpage>13</fpage><lpage>23</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Knyazev S.Y., Pustovoyt V.N., Shcherbakova E.E., Shcherbakov A.A., 2015</copyright-statement><copyright-year>2015</copyright-year><copyright-holder xml:lang="ru">Князев С.Ю., Пустовойт В.Н., Щербакова Е.Е., Щербаков А.А.</copyright-holder><copyright-holder xml:lang="en">Knyazev S.Y., Pustovoyt V.N., Shcherbakova E.E., Shcherbakov A.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.vestnik-donstu.ru/jour/article/view/37">https://www.vestnik-donstu.ru/jour/article/view/37</self-uri><abstract><p>The work objective is to investigate the possibility and efficiency of three-dimensional numerical models of the elastic stress fields in the deformed solids. The field point-source method (PSM) designated as the method of fundamental solutions (MFS) in the foreign literature is used to develop these models. The PSM system generation for modeling fields of different physical nature is described. The concept of a point source of the elastic displacement field in the deformed solid is introduced. The research result is a developed PSM equations system that can be applied for solving three-dimensional problems in the elasticity theory, including the classical first and second boundary value problems in the elasticity theory (when either the voltage or bias is set on the boundary), as well as a mixed boundary problem (when on one part of the boundary, the displacement is set, and on the other - the voltage). The PSM properties are studied when solving standard problems, and the Dirichlet problem for a circular domain. The dependences of the numerical solution error on the problem parameters, in particular, on such as the charge number simulating the desired field, the remoteness of the charges from the solution domain boundaries, are obtained. The test problem of calculating the deformation field in the ball domain is solved. Upon the results obtained, the following conclusion is made. In the numerical solution of three-dimensional elasticity problems, a decreasing exponential dependence of the PSM error on the square root of the simulating charge number is observed. This property provides a numerical solution with a very low relative error that implies the PSM application perspectiveness in the numerical solution of the elasticity problems, including three-dimensional problems.</p></abstract><trans-abstract xml:lang="ru"><p>Целью работы является исследование возможности и эффективности трехмерных численных моделей полей упругих напряжений в деформированных твердых телах. При построении моделей используется метод точечных источников поля (МТИ), называемый в зарубежной литературе методом фундаментальных решений. Описывается построение системы МТИ при моделировании полей различной физической природы. Вводится понятие точечного источника поля упругих смещений в деформированном твердом теле. Результатом работы является построение МТИ системы, которую можно использовать для решения трехмерных задач теории упругости - например, для решения классических первой и второй граничных задач теории упругости (когда на границе заданы либо напряжения, либо смещения), а также смешанной граничной задачи (когда на одной части границы заданы смещения, а на другой - напряжения). Исследуются свойства МТИ при решении стандартной задачи, задачи Дирихле для круговой области. Найдены зависимости погрешности численного решения от параметров задачи - в частности, таких, как число зарядов, моделирующих искомое поле, удаленность зарядов от границ области решения. Решается тестовая задача расчета поля деформаций в шаровой области. На основании полученных результатов делается следующий вывод. При численном решении трехмерных задач теории упругости наблюдается убывающая экспоненциальная зависимость погрешности МТИ от квадратного корня из числа моделирующих зарядов. Это свойство позволяет получить численное решение с весьма низкой относительной погрешностью, что свидетельствует о перспективности использования МТИ при численном решении задач теории упругости, в том числе и при решении трехмерных задач</p></trans-abstract><kwd-group xml:lang="ru"><kwd>метод точечных источников</kwd><kwd>метод фундаментальных решений</kwd><kwd>задача теории упругости</kwd><kwd>задача Дирихле</kwd><kwd>field Point-Source method</kwd><kwd>method of fundamental solutions</kwd><kwd>elasticity problem</kwd><kwd>Dirichlet problem</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Победря, Б. Е. Численные методы в теории упругости и пластичности / Б. Е. Победря. - 2-е изд. - Москва : Изд-во МГУ, 1995. - 366 с.</mixed-citation><mixed-citation xml:lang="en">Pobedrya, B.Е. Chislennye metody v teorii uprugosti i plastichnosti. 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