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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)-11</article-id><article-id custom-type="elpub" pub-id-type="custom">hydrophysics-1243</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>ВЗАИМОДЕЙСТВИЕ МОРСКИХ ОБЪЕКТОВ, ОКЕАНА И АТМОСФЕРЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>INTERACTION OF MARINE OBJECTS*, OCEAN‏ AND ‏ATMOSPHERE</subject></subj-group></article-categories><title-group><article-title>Теория случайных матриц для описания рассеяния звука на фоновых внутренних волнах в условиях мелкого моря</article-title><trans-title-group xml:lang="en"><trans-title>Random matrix theory for description of sound scattering on background internal waves in a shallow sea</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2568-8927</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Макаров</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Makarov</surname><given-names>D. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Денис Владимирович Макаров</p><p>690041</p><p>ул. Балтийская, 43</p><p>Владивосток</p><p>РИНЦ Author ID: 41768</p><p>Scopus Author ID: 57196559649</p><p>WoS Researcher ID: D-6389–2015</p></bio><bio xml:lang="en"><p>690041</p><p>Baltiyskaya Street, 43</p><p>Vladivostok</p></bio><email xlink:type="simple">makarov@poi.dvo.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/0000-0001-7810-9047</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Соседко</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Sosedko</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Екатерина Владимировна Соседко</p><p>690041</p><p>ул. Балтийская, 43</p><p>Владивосток</p><p>РИНЦ Author ID: 38924</p><p>Scopus Author ID: 6507031107</p><p>WoS Researcher ID: AAF-7922–2021</p></bio><bio xml:lang="en"><p>690041</p><p>Baltiyskaya Street, 43</p><p>Vladivostok</p></bio><email xlink:type="simple">sosedko@poi.dvo.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Тихоокеанский океанологический институт им. В.И. Ильичева ДВО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>V.I. Il’ichev Pacific Oceanological Institute, Far Eastern Branch Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>20</day><month>10</month><year>2023</year></pub-date><volume>16</volume><issue>3</issue><fpage>142</fpage><lpage>155</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Макаров Д.В., Соседко Е.В., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Макаров Д.В., Соседко Е.В.</copyright-holder><copyright-holder xml:lang="en">Makarov D.V., Sosedko E.V.</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/1243">https://hydrophysics.spbrc.ru/jour/article/view/1243</self-uri><abstract><p>   Рассматривается задача о распространении низкочастотного звука в мелководном волноводе со случайной гидрологической неоднородностью, обусловленной фоновыми внутренними волнами. Новый подход к статистическому моделированию акустических полей, основанный на теории случайных матриц и ранее успешно применявшийся для глубоководных акустических волноводов, использован для мелководных волноводов. В данном подходе рассеяние звука на случайной неоднородности описывается с помощью статистического ансамбля матриц пропагатора, которые описывают трансформацию акустического поля в пространстве нормальных мод волновода. Проведено исследование эффекта «высвечивания» звука из волновода. Термин «высчечивание» здесь означает перекачку энергии в моды с повышенным поглощением за счет рассеяния на внутренних волнах. Рассмотрена модель подводного звукового канала с осью на глубине около 45 метров. Обнаружено, что первые несколько мод, распространяющихся внутри водной толщи, в очень малой степени подвержены потерям, обусловленным «высвечиванием». Наиболее сильное «высвечивание» испытывает средняя группа мод, способная достигать морской поверхности. Это проявляется как значительное усиление потерь по сравнению с горизонтально однородным волноводом. С другой стороны, выявлено существование линейных модовых комбинаций, для которых усиление потерь практически отсутствует. Данные линейные комбинации соответствуют собственным функциям пропагатора для неоднородного волновода. Статистический анализ собственных функций пропагатора указывает на качественные отличия механизмов рассеяния звука при частотах 100 и 500 Гц.</p></abstract><trans-abstract xml:lang="en"><p>   The problem of propagation of low-frequency sound in a shallow waveguide with random hydrological inhomogeneity caused by background internal waves is considered. A new approach to statistical modeling of acoustic fields, based on the application of the random matrix theory and previously successfully used for deep-water acoustic waveguides, is used to the case of shallow-water waveguides. In this approach, sound scattering on random inhomogeneity is described using an ensemble of random propagator matrices which describe the transformation of the acoustic field in the space of normal waveguide modes. A study of the effect of sound “escaping” from a waveguide was carried out. The term “escaping” here means energy transfer to modes with stronger attenuation due to scattering on internal waves. A model of an underwater sound channel with an axis at a depth of about 45 meters is considered. It is shown that the first few modes propagating inside the water column are very little subject to losses due to the “escaping”. The strongest impact of the leakage scattering is experienced by the middle group of modes capable of reaching the sea surface. It is revealed as significant increasing of losses as compared to a horizontally homogeneous waveguide. On the other hand, the existence of linear mode combinations for which loss enhancement is practically absent has been revealed. These linear combinations correspond to the eigenfunctions of an inhomogeneous waveguide. Statistical analysis of propagator eigenfunctions indicates on qualitative differences of mechanisms of scattering for frequencies of 100 and 500 Hz.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>подводный звуковой канал</kwd><kwd>внутренние волны</kwd><kwd>лучевой хаос</kwd><kwd>пропагатор акустического поля</kwd><kwd>теория случайных матриц</kwd></kwd-group><kwd-group xml:lang="en"><kwd>underwater sound channel</kwd><kwd>internal waves</kwd><kwd>ray chaos</kwd><kwd>acoustic wavefield propagator</kwd><kwd>random matrix theory</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках госбюджетной тематики ТОИ ДВО РАН «Моделирование разномасштабных динамических процессов в океане» (рег. номер темы 121021700341–2)</funding-statement><funding-statement xml:lang="en">This work was carried out in the framework of the POI FEB RAS Program “Modelling of various-scale dynamical processes in the ocean” (registration number 121021700341–2)</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">Tappert F.D., Xin Tang. 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