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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">cheb</journal-id><journal-title-group><journal-title xml:lang="ru">Чебышевский сборник</journal-title><trans-title-group xml:lang="en"><trans-title>Chebyshevskii Sbornik</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2226-8383</issn><publisher><publisher-name>Tula State Lev Tolstoy  Pedagogical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22405/2226-8383-2024-25-1-205-214</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-1689</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>История математики и приложений</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Сomputer science</subject></subj-group></article-categories><title-group><article-title>Акустическое излучение сфероида, обтекаемого стационарным потоком идеальной жидкости</article-title><trans-title-group xml:lang="en"><trans-title>Acoustic radiation of a spheroid streamlined by a stationary flow of an ideal liquid</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>Толоконников</surname><given-names>Лев Алексеевич</given-names></name><name name-style="western" xml:lang="en"><surname>Tolokonnikov</surname><given-names>Lev Alexeevich</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор физико-математических наук, профессор</p></bio><bio xml:lang="en"><p>doctor of physical and mathematical sciences, professor</p></bio><email xlink:type="simple">TolokonnikovLA@mail.ru</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>Толоконников</surname><given-names>Сергей Львович</given-names></name><name name-style="western" xml:lang="en"><surname>Tolokonnikov</surname><given-names>Sergey Lvovich</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор физико-математических наук, профессор</p></bio><bio xml:lang="en"><p>doctor of physical and mathematical sciences, professor</p></bio><email xlink:type="simple">tolsl@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Тульский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Tula State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Московский государственный университет им. М. В. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lomonosov Moscow State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>24</day><month>04</month><year>2024</year></pub-date><volume>25</volume><issue>1</issue><fpage>205</fpage><lpage>214</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Толоконников Л.А., Толоконников С.Л., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Толоконников Л.А., Толоконников С.Л.</copyright-holder><copyright-holder xml:lang="en">Tolokonnikov L.A., Tolokonnikov S.L.</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://www.chebsbornik.ru/jour/article/view/1689">https://www.chebsbornik.ru/jour/article/view/1689</self-uri><abstract><p>В статье рассматривается задача об акустическом излучении сфероида, обтекаемого стационарным потоком идеальной жидкости.Полагается, что скорость набегающего потока значительно меньше скорости звука. Часть поверхности сфероида совершает гармонические колебания, а остальная часть является абсолютно жесткой.Задача решается в вытянутой сфероидальной системе координат. Получено приближенное аналитическое решение задачи, построенное с использованием потенциала скорости набегающего на тело потока и потенциала скорости акустического поля неподвижного излучателя.Представлены результаты численных расчетов полярных диаграмм распределения акустического давления на поверхности сфероида при разных значениях отношения скорости потока к скорости звука и различной конфигурации сфероида.</p></abstract><trans-abstract xml:lang="en"><p>In the article the problem of the acoustic radiation of a spheroid streamlined by a stationary flow of an ideal liquid is considered.It is assumed that the velocity of the incoming flow is significantly lower than the speed of sound. Part of the surface of the spheroid makes harmonic vibrations and the rest part is absolutely rigid.The problem is solved in a prolate spheroidal coordinate system. An approximate analytical solution of the problem was obtained with using the speed potential of the oncoming on the body flow and the speed potential of the stationary radiator acoustic field.The results of numerical calculations of polar diagrams of the acoustic pressure distribution on the surface of a spheroid at different values of the ratio of the flow velocity to the speed of sound and different configurations of the spheroid are presented.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>акустическое излучение</kwd><kwd>сфероид</kwd><kwd>идеальная жидкость</kwd><kwd>потенциальное течение</kwd></kwd-group><kwd-group xml:lang="en"><kwd>acoustic radiation</kwd><kwd>spheroid</kwd><kwd>ideal fluid</kwd><kwd>potential flow</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания Министерства просвещения РФ соглашение № 073- 00033-24-01 от 09.02.2024 тема научного исследования «Теоретико-числовые методы в приближенном анализе и их приложения в механике и физике».</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">Cheгtock G. 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