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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">hydrophysics</journal-id><journal-title-group><journal-title xml:lang="ru">Фундаментальная и прикладная гидрофизика</journal-title><trans-title-group xml:lang="en"><trans-title>Fundamental and Applied Hydrophysics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2073-6673</issn><issn pub-type="epub">2782-5221</issn><publisher><publisher-name>St. Petersburg Research Center of the Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.59887/2073-6673.2023.16(3)-8</article-id><article-id custom-type="elpub" pub-id-type="custom">hydrophysics-1240</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>ФУНДАМЕНТАЛЬНЫЕ ВОПРОСЫ ГИДРОФИЗИКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>FUNDAMENTAL ISSUES OF HYDROPHYSICS</subject></subj-group></article-categories><title-group><article-title>Развитие метода параболического приближения в задачах дифракции морских волн на акватории порта</article-title><trans-title-group xml:lang="en"><trans-title>Development of the parabolic equation for calculation of sea waves diffraction in port area</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3894-3680</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гогин</surname><given-names>А. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Gogin</surname><given-names>A. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Григорьевич Гогин</p><p>129337</p><p>Ярославское шоссе, д. 26</p><p>Москва</p><p>РИНЦ Author ID: 994101</p><p>Scopus Author ID: 57192663878</p><p>WoS Researcher ID: HCH-8254–2022</p></bio><bio xml:lang="en"><p>129337</p><p>26 Yaroslavskoe shosse</p><p>Moscow</p></bio><email xlink:type="simple">alex.gogin@bk.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/0000-0002-0587-4722</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кантаржи</surname><given-names>И. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Kantarzhi</surname><given-names>I. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Измаил Григорьевич Кантаржи</p><p>129337</p><p>Ярославское шоссе, д. 26</p><p>Москва</p><p>РИНЦ Author ID: 60202, 1086368</p><p>Scopus Author ID: 6602848417, 57200265787</p><p>WoS Researcher ID: A-1922–2014</p></bio><bio xml:lang="en"><p>129337</p><p>26 Yaroslavskoe shosse</p><p>Moscow</p></bio><email xlink:type="simple">kantardgi@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский Московский государственный строительный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Moscow State University of Civil Engineering (National Research University)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>19</day><month>10</month><year>2023</year></pub-date><volume>16</volume><issue>3</issue><fpage>106</fpage><lpage>119</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Гогин А.Г., Кантаржи И.Г., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Гогин А.Г., Кантаржи И.Г.</copyright-holder><copyright-holder xml:lang="en">Gogin A.G., Kantarzhi I.G.</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://hydrophysics.spbrc.ru/jour/article/view/1240">https://hydrophysics.spbrc.ru/jour/article/view/1240</self-uri><abstract><p>   Получены аналитические выражения метода параболического приближения для расчета дифракции морских волн за сходящимися оградительными сооружениями, расположенными под углом к подходящим волнам. Для этого использован способ линейной суперпозиции результатов, полученных отдельно для каждого из молов. На основе сравнения результатов, получаемых этим методом, с результатами физических (в волновом бассейне) и численных (с помощью DHI MIKE 21 BW) экспериментов при разных постановках задачи (всего 40) сделан вывод о допустимости применения полученных выражений. Результаты исследования позволяют рекомендовать полученные выражения для прикладного использования при прогнозировании параметров волнового режима на акватории морских портов, где сильны дифракционные явления. Комплексность используемой в методе параболического уравнения функции становится причиной появления «лепестков» изолиний коэффициента дифракции на защищаемой акватории. Представлены аппроксимативные выражения для сглаживания осцилляций функции комплексной амплитуды по линиям, параллельным и перпендикулярным оси оградительных сооружений. В результате получено, что комплексность используемой функции является причиной получения ошибки при определении коэффициента дифракции, оцениваемой в среднем в пределах от 2 до 5 %. Максимальная амплитуда осцилляций коэффициента дифракции составила 12,5 % от значения, полученного с помощью аппроксимативного выражения.</p></abstract><trans-abstract xml:lang="en"><p>   Application method of parabolic equations is presented in this paper for calculating diffraction of sea waves behind converging breakwaters, which entrance is not parallel to front of approaching waves. For this, the method of linear superposition of results obtained separately for each breakwater was used. Based on a comparison of results obtained by this method with results of physical (obtained in a wave basin) and numerical (obtained using DHI MIKE 21 BW) model experiments with different settings (40 models in total), a conclusion about using allowability of the obtained equations was made. Results of the study make it possible to recommend the obtained equations for practical use in studies of seaports wave regimes, where diffraction phenomena are strong. Complexity of a function used in the parabolic method causes appearance of “petals” of diffraction coefficient isolines in protected water area. Approximate equations are presented for smoothing the oscillations of the complex amplitude function along lines parallel and perpendicular to axis of breakwaters. It is shown that associated error in obtaining diffraction coefficient varies on average within 2–5 %, and maximum error obtained was 12.5 %.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>морской порт</kwd><kwd>волновой режим</kwd><kwd>морские волны</kwd><kwd>ветровые волны</kwd><kwd>дифракция</kwd><kwd>параболическое уравнение</kwd><kwd>параболическое приближение</kwd><kwd>диффузия волновой амплитуды</kwd></kwd-group><kwd-group xml:lang="en"><kwd>seaport</kwd><kwd>wave regime</kwd><kwd>sea waves</kwd><kwd>wind waves</kwd><kwd>diffraction</kwd><kwd>parabolic equation</kwd><kwd>wave amplitude diffusion</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено при финансовой поддержке РФФИ в рамках научного проекта № 20-38-90169</funding-statement><funding-statement xml:lang="en">The reported study was particularly funded by RFBR, project number 20-38-90169</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Кантаржи И.Г., Мордвинцев К.П., Гогин А.Г. 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