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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">rmrs</journal-id><journal-title-group><journal-title xml:lang="ru">Научно-технический сборник Российского морского регистра судоходства</journal-title><trans-title-group xml:lang="en"><trans-title>Research Bulletin by Russian Maritime Register of Shipping</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2223-7097</issn><publisher><publisher-name>Российский морской регистр судоходства</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">rmrs-78</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>МОРЕХОДНЫЕ КАЧЕСТВА СУДОВ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>SEAWORTHINESS</subject></subj-group></article-categories><title-group><article-title>Анализ ходовых качеств судна при движении по старым ледовым каналам</article-title><trans-title-group xml:lang="en"><trans-title>Performance analysis of ship moving in old ice channel</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>Карулина</surname><given-names>М. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Karulina</surname><given-names>M. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. техн. наук</p><p>196158 Россия, Санкт-Петербург, Московское ш., 44</p></bio><bio xml:lang="en"><p>PhD</p><p>196158 Russia, St. Petersburg, Moskovskoe sh., 44 </p></bio><email xlink:type="simple">for.marina.m.k@gmail.com</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>Карулин</surname><given-names>Е. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Karulin</surname><given-names>E. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p> канд. техн. наук, доц.</p><p>196158 Россия, Санкт-Петербург, Московское ш., 44</p></bio><bio xml:lang="en"><p>PhD, Associate Prof </p><p>196158 Russia, St. Petersburg, Moskovskoe sh., 44 </p></bio><email xlink:type="simple">evgeny.b.k@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГУП «Крыловский государственный научный центр»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Krylov State Research Centre</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>11</day><month>12</month><year>2024</year></pub-date><volume>1</volume><issue>76</issue><fpage>4</fpage><lpage>15</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Карулина М.М., Карулин Е.Б., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Карулина М.М., Карулин Е.Б.</copyright-holder><copyright-holder xml:lang="en">Karulina M.M., Karulin E.B.</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://sbornik.rs-class.org/jour/article/view/78">https://sbornik.rs-class.org/jour/article/view/78</self-uri><abstract><p>Движение по старым ледовым каналам, заполненным обломками льда (ледяной кашей), является довольно частым режимом эксплуатации судов ледового плавания и вместе с тем недостаточно изученным. Цель настоящей работы — изучить изменения ходовых качеств судна ледового плавания при его движении по забитому льдом ледовому каналу на примере одного из эксплуатирующихся в настоящее время судов «Юрий Топчев». В статье предложено решение двух сопутствующих задач для оценки ходкости судна: 1) определение ледового сопротивления судна, движущегося по каналу, заполненному ледяной кашей; 2) аналитическая оценка изменения величины упора и потребляемой мощности гребного винта при работе в ледяной каше по отношению к работе в чистой воде. Численные расчеты показали, что при работе гребного винта в слое ледяной каши толщиной 0,2 диаметра гребного винта его эффективность снижается на величину до 20 %. Результаты расчетов ходкости судна «Юрий Топчев», включающие оценку как сопротивления корпуса, так и гидродинамических параметров гребных винтов, показали, что при движении в ледяной каше толщиной 1 — 3 м (0,125 — 0,375 от осадки) снижение максимальной скорости судна может достигать 25 — 40 % соответственно. Результаты исследований могут быть использованы при планировании продолжительных рейсов судов в ледовых условиях, когда учет изменения параметров ходкости при движении в ледяной каше становится особенно важным.</p></abstract><trans-abstract xml:lang="en"><p>Navigation in old ice channels filled with broken (or brash) ice is a frequent operational scenario for ice-going ships, and at the same time insufficiently studied. The purpose of the present work is to study the change of ship propulsion performance in brash ice as compared with open-water conditions taking Yury Topchev, one of the ice-going ships currently in service, as a case study. Two related tasks to the propulsion performance study have been performed in the paper: 1) the brash ice resistance assessment of ship moving in the channel, and 2) analytical assessment of the change in propeller in thrust and power demand, in brash ice conditions as compared with open water. Numerical simulations have shown that a brash ice layer with the thickness equal to 0,2 propeller diameter reduces propeller efficiency by up to 20 %. Propulsion performance calculations for Yury Topchev, including the assessment of both hull resistance and propeller hydrodynamics have shown that in brash ice with the thicknesses of 1 and 3 m (0,125 and 0,375 draft) the maximum speed of this ship might drop as low as by 25 % and 40 % respectively. The results of this study may be used in planning of long ship voyages in ice conditions, when the changes in propulsion performance due to brash ice become especially relevant.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>ледовый канал</kwd><kwd>ледяная каша</kwd><kwd>ледовая ходкость</kwd><kwd>ледовое сопротивление</kwd><kwd>эффективность гребного винта</kwd><kwd>судно ледового плавания</kwd></kwd-group><kwd-group xml:lang="en"><kwd>ice channel</kwd><kwd>brash ice</kwd><kwd>ice performance</kwd><kwd>ice resistance</kwd><kwd>propeller efficiency</kwd><kwd>ice-going ship</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">Sandkvist J. Conditions in brash ice covered channels with repeated passages / J. 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