<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<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="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">vdgtu</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Дагестанского государственного технического университета. Технические науки</journal-title><trans-title-group xml:lang="en"><trans-title>Herald of Dagestan State Technical University. Technical Sciences</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2073-6185</issn><issn pub-type="epub">2542-095X</issn><publisher><publisher-name>Daghestan State Technical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21822/2073-6185-2025-52-3-159-171</article-id><article-id custom-type="elpub" pub-id-type="custom">vdgtu-1849</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="ru"><subject>ИНФОРМАЦИОННЫЕ ТЕХНОЛОГИИ И ТЕЛЕКОММУНИКАЦИИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>INFORMATION TECHNOLOGY AND TELECOMMUNICATIONS</subject></subj-group></article-categories><title-group><article-title>Использование метода конечных элементов для оценки работоспособности трубопроводов с дефектами геометрии</article-title><trans-title-group xml:lang="en"><trans-title>Finite Element method application for Assessing the performance of pipelines with Geometrical defects</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9767-9627</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хурамшина</surname><given-names>Р. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Khuramshina</surname><given-names>R. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Регина Азатовна Хурамшина - старший преподаватель, кафедра транспорта и хранения нефти и газа.</p><p>450062, Уфа, ул. Космонавтов 1</p></bio><bio xml:lang="en"><p>Regina A. Khuramshina - Senior Lecturer, Department of Oil and Gas Transport and Storage.</p><p>1 Kosmonavtov Str., Ufa 450064</p></bio><email xlink:type="simple">Khuramshina.regina@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>Гайзуллин</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Gaizullin</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Динар Альбертович Гайзуллин - преподаватель, Институт нефтегазового инжиниринга и цифровых технологий.</p><p>450062, Уфа, ул. Космонавтов 1</p></bio><bio xml:lang="en"><p>Dinar A. Gaizullin, Lecturer -  Institute of Oil and Gas Engineering and Digital Technologies.</p><p>1 Kosmonavtov Str., Ufa 450064</p></bio><email xlink:type="simple">rusgaizulla@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Уфимский государственный нефтяной технический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ufa State Petroleum Technological University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>10</day><month>11</month><year>2025</year></pub-date><volume>52</volume><issue>3</issue><fpage>159</fpage><lpage>171</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Хурамшина Р.А., Гайзуллин Д.А., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Хурамшина Р.А., Гайзуллин Д.А.</copyright-holder><copyright-holder xml:lang="en">Khuramshina R.A., Gaizullin D.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://vestnik.dgtu.ru/jour/article/view/1849">https://vestnik.dgtu.ru/jour/article/view/1849</self-uri><abstract><sec><title>Цель</title><p>Цель. Целью исследования является разработка и совершенствование методов оценки работоспособности трубопроводов с дефектами овальности для повышения безопасности и экономической эффективности эксплуатации.</p></sec><sec><title>Методы</title><p>Методы. Моделирование и уточненный расчет газопроводов производился в программном комплексе в упругопластической постановке задачи с использованием диаграммы деформирования по модели Рамберга-Осгуда. Расчёт является наиболее приближённым для деформированных сталей.</p></sec><sec><title>Резльтат</title><p>Резльтат. Расчеты на усталостную долговечность показали, что в условиях эксплуатации большинство дефектов овализации поперечного сечения до 10 % имеют остаточный ресурс. Разработана усовершенствованная методика для отбраковки труб с овальностью с учетом различных характеристик, которая позволяет обеспечить более достоверную отбраковку и оценку трубы с данным дефектом.</p></sec><sec><title>Вывод</title><p>Вывод. Предложенные методы, полученные при изучении дефекта поперечного сечения типа овальность, целесообразно использовать для оценки работоспособности дефектного участка газопровода, а также на этапе контроля технического состояния. Актуальность подтверждается тем, что дефект изучен с учетом многих факторов, которые влияют на прочностные характеристики стали.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Objective</title><p>Objective. The aim of this study is to develop and improve methods for assessing the performance of pipelines with ovality defects to enhance the safety and economic efficiency of their operation.</p></sec><sec><title>Methods</title><p>Methods. The modeling and refined calculation of pipelines were performed in a software package using the elastoplastic formulation of the problem with the use of the Ramberg-Osgood deformation diagram. The calculation is most approximate for deformed steels.</p></sec><sec><title>Results</title><p>Results. Fatigue life calculations have shown that, under operating conditions, most ovalization defects of the cross-section up to 10% retain residual service life. A method has been developed for rejecting pipes with ovality, taking into account various characteristics, allowing for more reliable rejection and evaluation of pipes with this defect.</p></sec><sec><title>Conclusion</title><p>Conclusion. The proposed methods, derived from the study of the cross-sectional defect of ovality, are advisable for assessing the performance of defective pipeline sections, as well as during the technical condition-monitoring phase. The relevance is confirmed by the fact that the defect was studied taking into account many factors that affect the strength characteristics of steel.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>метод конечных элементов</kwd><kwd>моделирование</kwd><kwd>газопровод</kwd><kwd>напряженно-деформированное состояние</kwd><kwd>внутритрубная диагностика</kwd></kwd-group><kwd-group xml:lang="en"><kwd>finite element method</kwd><kwd>modeling</kwd><kwd>gas pipeline</kwd><kwd>stress-strain state</kwd><kwd>in-line diagnostics</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">Захаров, М.Н. Методология оценки несущей способности магистральных трубопроводов с локальными дефектами // Диссертация на соискание учёной степени кандидата технических наук. 2011.</mixed-citation><mixed-citation xml:lang="en">Zakharov, M.N. Methodology for assessing the load-bearing capacity of main pipelines with local defects Dissertation for the degree of Candidate of Technical Sciences. 2011.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Голованов А.И. Расчёт напряжённо-деформированного состояния промысловых трубопроводов с дефектами потери металла методом конечных элементов // Известия Томского политехнического университета. Инжиниринг георесурсов. 2023, Т.332 (1), с.15-25.</mixed-citation><mixed-citation xml:lang="en">Golovanov, A.I. Calculation of the stress-strain state of field pipelines with metal loss defects using the finite element method. Izvestiya of Tomsk Polytechnic University. Engineering of Georesources. 2023;332 (1):15-25. (In Russ)</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Якупов, Н.М., Якупов, С.Н. Диагностика тонкостенных конструкций сложной геометрии и локальными дефектами методом конечных элементов // Строительная механика инженерных конструкций и сооружений. 2021;7(6):576-587 DOI:10.22363/1815-5235-2021-17-6-576-587</mixed-citation><mixed-citation xml:lang="en">Yakupov, N.M., Yakupov, S.N. Diagnostics of thin-walled structures with complex geometry and local defects using the finite element method. Structural Mechanics of Engineering Constructions and Structures. 2021;7(6):576-587 DOI:10.22363/1815-5235-2021-17-6-576-587</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Majid, Z.A., Mohsin, R., Yusof, M.Z. Experimental and computational failure analysis of natural gas pipe // Engineering Failure Analysis. 2012;19:32-42.</mixed-citation><mixed-citation xml:lang="en">Majid, Z.A., Mohsin, R., Yusof, M.Z. Experimental and computational failure analysis of natural gas pipe. Engineering Failure Analysis. 2012;19:32-42.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Yi, J., Hu, H., Zheng, Y., Zhang, Y. Experimental and computational failure analysis of a high pressure regulating valve in a chemical plant // Engineering Failure Analysis. 2010; 17:546–554</mixed-citation><mixed-citation xml:lang="en">Yi, J., Hu, H., Zheng, Y., Zhang, Y. Experimental and computational failure analysis of a high pressure regulating valve in a chemical plant. Engineering Failure Analysis. 2010; 17:546–554..</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Zhang, Q., Zuo, Z., Liu, J. Failure analysis of a diesel engine cylinder head based on finite element method // Engineering Failure Analysis. 2013; 34:51-58.</mixed-citation><mixed-citation xml:lang="en">Zhang, Q., Zuo, Z., Liu, J. Failure analysis of a diesel engine cylinder head based on finite element method Engineering Failure Analysis. 2013; 34:51-58.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Moradi, S., Ranjbar, K. Experimental and computational failure analysis of drillstrings // Engineering Failure Analysis. 2009;6(3): 923-933.</mixed-citation><mixed-citation xml:lang="en">Moradi, S., Ranjbar, K. Experimental and computational failure analysis of drillstrings. Engineering Failure Analysis. 2009;6(3): 923-933.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">De Borst, R., Gutiérrez, M.A., Wells, G.N., Remmers, J.J. C., Askes, H. Cohesive-zone models, higher-order continuum theories and reliability methods for computational failure analysis // International Journal for Numerical Methods in Engineering. 2004; 60:289–315 ( DOI: 10.1002/nme.963 )</mixed-citation><mixed-citation xml:lang="en">De Borst, R., Gutiérrez, M.A., Wells, G.N., Remmers, J.J. C., Askes, H. Cohesive-zone models, higher-order continuum theories and reliability methods for computational failure analysis. International Journal for Numerical Methods in Engineering. 2004; 60:289–315. DOI: 10.1002/nme.963.</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
