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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">10.17073/0368-0797-2024-3-369-376</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-2742</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>Математическое моделирование нагрева сляба в печи с шагающими балками с учетом их кривизны</article-title><trans-title-group xml:lang="en"><trans-title>Mathematical modeling of slab heating in a furnace with walking beams due to their curvature</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8657-8716</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-1"/></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-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><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>2024</year></pub-date><pub-date pub-type="epub"><day>16</day><month>06</month><year>2024</year></pub-date><volume>67</volume><issue>3</issue><fpage>369</fpage><lpage>376</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Варгин А.В., Левицкий И.А., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Варгин А.В., Левицкий И.А.</copyright-holder><copyright-holder xml:lang="en">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/2742">https://fermet.misis.ru/jour/article/view/2742</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. Ранее авторами была разработана и программно реализована математическая модель нагрева сляба в печи с шагающими балками, основанная на численном решении методом конечных разностей трехмерной задачи теплопроводности с кусочно-определенными граничными условиями на нижней поверхности сляба. В этой модели для открытых областей нижней поверхности сляба задавались граничные условия, аналогичные условиям на верхней поверхности, а для областей контакта с балками – эффективные граничные условия, учитывающие продолжительность этого контакта. В данной работе модель нагрева сляба модифицирована, она позволяет учитывать кривизну балок и пересчитывать конфигурацию областей с различными граничными условиями на нижней поверхности сляба для каждого положения его вдоль печи. Вариантными расчетами при различных значениях интенсивности теплоотвода от нижних поверхностей сляба к балкам получено, что искривление одиночной балки может существенно изменить характеристику соответствующего «холодного» пятна, но оно практически не влияет на общую характеристику неравномерности нагрева сляба. Однако если искривлению подвергнуть все неподвижные балки, то существенно сокращается итоговый перепад по слябу вследствие увеличения его минимальной температуры. Установлено, что влияние кривизны балок на температурное поле в конце нагрева тем больше, чем интенсивнее теплоотвод к балкам.</p></abstract><trans-abstract xml:lang="en"><p>Slab heating before hot rolling process is necessary for obtaining required metal ductility. The most effective for this purpose are furnaces with walking beams that provide heat supply to all sides of the slab. However, the places of slabs lower surfaces, contacting with water-cooled beams, are shielded from the radiation of the furnace lower heating zones and give the heat to the beams. Previously, the authors developed and programmatically implemented a mathematical model of slab heating in a furnace with walking beams, based on the numerical solution by finite difference method of the three-dimensional heat conduction problem with piecewise defined boundary conditions on the slab bottom surface. In this model, for the open zones of the slab bottom surface, boundary conditions were similar to those on the top surface, and for the zones of contact with the beams were set effective boundary conditions assuming duration of this contact. In this paper, the model was modified to take into account the curvature of the beams and to recalculate the configuration of zones with different boundary conditions on the slab bottom surface for each position of the slab along the furnace. By variant calculations at different values of heat transfer intensity from the slab bottom surfaces to the beams it was determined that curvature of a single beam can significantly change the characteristic of the corresponding “cold” spot, but it practically does not affect the general characteristic of the slab heating non-uniformity. If all fixed beams are subjected to curvature, the final temperature difference across the slab is significantly reduced due to an increase in its minimum temperature. It was found that the influence of beam curvature on the temperature field at the end of heating process is higher the more intensive the heat transfer to the beams is</p></trans-abstract><kwd-group xml:lang="ru"><kwd>математическое моделирование</kwd><kwd>нагрев сляба</kwd><kwd>печь с шагающими балками</kwd><kwd>кривизна балок</kwd></kwd-group><kwd-group xml:lang="en"><kwd>mathematical modeling</kwd><kwd>slab heating</kwd><kwd>furnace with walking beams</kwd><kwd>curvature of beams</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. Москва: Теплотехник; 2004:400.</mixed-citation><mixed-citation xml:lang="en">Gusovskшш V.L., Lifshits A.E. Methods of Calculation of Heating and Thermal Furnaces: Training and Reference Book. Moscow: Teplotechnik; 2004:400. 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