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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="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">blackmet</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. Черная Металлургия</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya. Ferrous Metallurgy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-0797</issn><issn pub-type="epub">2410-2091</issn><publisher><publisher-name>National University of Science and Technology "MISIS"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/0368-0797-2023-1-112-118</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-2487</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 АВТОМАТИЗАЦИЯ В ЧЕРНОЙ  МЕТАЛЛУРГИИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>INFORMATION TECHNOLOGIES AND AUTOMATIC CONTROL IN FERROUS METALLURGY</subject></subj-group></article-categories><title-group><article-title>Математическая модель нагрева сляба в печи с шагающими балками</article-title><trans-title-group xml:lang="en"><trans-title>Simulation of slab heating in a walking beam furnace</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>Абдукодиров</surname><given-names>И. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Abdukodirov</surname><given-names>I. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Илхомжон Бахтиерович Абдукодиров, заместитель начальника участка заготовки и сортировки металла</p><p>Республика Узбекистан, 100213, Ташкент, ул. Х. Байкаро, 41</p></bio><bio xml:lang="en"><p>Ilkhomzhon B. Abdukodirov, Deputy Head of the Section of Metal Pre­paration and Sorting</p><p>41 Kh. Baikaro Str., Tashkent 100213, Republic of Uzbekistan</p></bio><email xlink:type="simple">ilhomabdukadirov@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8657-8716</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Варгин</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Vargin</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Вячеславович Варгин, аспирант кафедры энергоэффективных и ресурсосберегающих промышленных технологий</p><p>Россия, 119049, Москва, Ленинский пр., 4</p></bio><bio xml:lang="en"><p>Aleksandr V. Vargin, Postgraduate of the Chair “Energy-Efficient and Resource-Saving Industrial Technologies”</p><p>4 Leninskii Ave., Moscow 119049, Russian Federation</p></bio><email xlink:type="simple">mr.vargin@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9345-3628</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Левицкий</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Levitskii</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Игорь Анисимович Левицкий, к.т.н., доцент кафедры энергоэффективных и ресурсосберегающих промышленных технологий</p><p>Россия, 119049, Москва, Ленинский пр., 4</p></bio><bio xml:lang="en"><p>Igor’ A. Levitskii, Cand. Sci. (Eng.), Assist. Prof. of the Chair “Energy-Efficient and Resource-Saving Industrial Technologies”</p><p>4 Leninskii Ave., Moscow 119049, Russian Federation</p></bio><email xlink:type="simple">lewwwis@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Дочернее предприятие «Литейно-механический завод» Унитарного предприятия «O'ztemiryo'lmashta'mir»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Subsidiary Foundry and Mechanical Plant of the "O'ztemiryo'lmashta'mir" Unitary Enterprise</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Национальный исследовательский технологический университет «МИСИС»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National University of Science and Technology “MISIS”</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>01</day><month>03</month><year>2023</year></pub-date><volume>66</volume><issue>1</issue><fpage>112</fpage><lpage>118</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Абдукодиров И.Б., Варгин А.В., Левицкий И.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Абдукодиров И.Б., Варгин А.В., Левицкий И.А.</copyright-holder><copyright-holder xml:lang="en">Abdukodirov I.B., Vargin A.V., Levitskii I.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://fermet.misis.ru/jour/article/view/2487">https://fermet.misis.ru/jour/article/view/2487</self-uri><abstract><p>Нагрев слябов перед горячей прокаткой необходим для придания металлу требуемых пластических свойств. Наиболее эффективны для этого печи с шагающими балками, обеспечивающие подачу теплоты со всех сторон сляба. Однако области нижних поверхностей слябов, контактирующие с водоохлаждаемыми балками, экранированы от излучения нижних зон обогрева печи и отдают теплоту балкам. Для исследования неоднородности температурного поля слябов и ее зависимости от особенностей конструкции системы транспортировки разработана и программно реализована математическая модель нагрева сляба в печи с шагающими балками. Модель основана на численном решении трехмерной задачи теплопроводности с кусочно-определенными граничными условиями на нижней поверхности сляба. Для открытых областей нижней поверхности сляба задавались такие же граничные условия, как на верхней поверхности, а для областей контакта с балками – модифицированные граничные условия, учитывающие продолжительность этого контакта. Для численного решения системы разностных уравнений применен послойный метод, позволяющий получить систему с трехдиагональной матрицей коэффициентов. Проведенные расчеты в приближении адиабатности участков контакта сляба с балками в период контакта позволили получить температурные поля для различных сечений сляба. В результате выявлена существенная неоднородность температурного поля нижней поверхности сляба, влияющая на неоднородность температурного поля всего сляба. Разработанная программа расчета и визуализации результатов может быть использована для изучения температурного поля сляба при различных режимах его нагрева в случае наличия экспериментальной информации, позволяющей уточнить настроечные параметры модели.</p></abstract><trans-abstract xml:lang="en"><p>Slabs are preheated before hot rolling to achieve the required metal plasticity. Walking beam furnace is the most efficient form of equipment since it heats the slab from all sides. Nevertheless, the bottom surfaces in contact with the water-cooled support beams are shielded from the heat radiated by the lower part of the furnace, and their heat is transferred to the beams. We developed and implemented by means of software a simulation model to study the non-uniformity of the temperature distribution across the slab and how the slab transportation system design affects it. Thesimulation model includes a numerical solution of a 3D thermal conductivity problem with piecewise defined boundary conditions on the slab bottom surface. Identical boundary conditions were applied to both the top surface and the open areas of the slab bottom surface. For the areas of contact with the beams, we applied modified boundary conditions to account for the duration of the contact. We numerically solved the system of difference equations with the layer-by-layer method, in order to obtain a system defined by a tridiagonal matrix. The slab-to-beam contact heat transfer was assumed to be adiabatic during the entire contact period. The calculations produced the temperature fields at different cross-sections of the slab. As a result, we discovered a significant non-uniformity of the temperature field on the lower surface of the slab leading to the entire  temperature field non-uniformity of the slab. We developed simulation and visualization software to study the slab temperature field under various heating conditions. The simulation model is refined from the experimental data available.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>математическое моделирование</kwd><kwd>нагрев сляба</kwd><kwd>печь с шагающими балками</kwd><kwd>трехмерная задача теплопроводности</kwd><kwd>граничные условия</kwd><kwd>метод конечных разностей</kwd><kwd>коэффициент теплоотдачи</kwd></kwd-group><kwd-group xml:lang="en"><kwd>mathematical simulation</kwd><kwd>slab heating</kwd><kwd>walking-beam furnace</kwd><kwd>3D heat transfer problem</kwd><kwd>boundary conditions</kwd><kwd>finite difference method</kwd><kwd>heat transfer coefficient</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">Гусовский В.Л., Лифшиц А.Е. Методики расчета нагревательных и термических печей: Учебно-справочное издание. М.: Теплотехник; 2004: 400.</mixed-citation><mixed-citation xml:lang="en">Gusovskii V.L., Lifshits A.E. 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