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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">isplta</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Санкт-Петербургской лесотехнической академии</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestia Sankt-Peterburgskoj lesotehniceskoj akademii</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2079-4304</issn><issn pub-type="epub">2658-5871</issn><publisher><publisher-name>СПбГЛТУ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21266/2079-4304.2026.258.367-378</article-id><article-id custom-type="elpub" pub-id-type="custom">isplta-761</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>ДРЕВЕСИНОВЕДЕНИЕ, ТЕХНОЛОГИЯ И ОБОРУДОВАНИЕ ДЕРЕВОПЕРЕРАБОТКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>WOOD SCIENCE. MECHANICAL WOODWORKING INDUSTRY</subject></subj-group></article-categories><title-group><article-title>Изменчивость скорости ультразвуковых колебаний в древесине сосны (Pinus sylvestris L.) поперек волокон по радиусу</article-title><trans-title-group xml:lang="en"><trans-title>Radial Variability of Ultrasonic Wave Velocity Across the Grain in Scots Pine (Pinus sylvestris L.) Wood</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0000-1370-1285</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Королев</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Korolev</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>КОРОЛЕВ Александр Сергеевич – старший научный сотрудник департамента научной и международной деятельности, доцент кафедры строительных конструкций и водоснабжения, кандидат технических наук</p><p>424000, пл. Ленина, д. 3, г. Йошкар-Ола</p></bio><bio xml:lang="en"><p>KOROLEV Aleksandr S. – PhD (Technical), Senior Researcher, Department of Scientific and International Activities, Associate Professor, Department of Building Structures and Water Supply</p><p>424000. Lenina sq. 3. Yoshkar-Ola</p></bio><email xlink:type="simple">KorolevAS@volgatech.net</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6500-5377</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шарапов</surname><given-names>Е. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Sharapov</surname><given-names>E. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>ШАРАПОВ Евгений Сергеевич – профессор кафедры строительных конструкций и водоснабжения, доцент, доктор технических наук</p><p>ResearcherID: D-7953-2015</p><p>424000, пл. Ленина, д. 3, г. Йошкар-Ола</p></bio><bio xml:lang="en"><p>SHARAPOV Evgeniy S. – DSc (Technical), Professor, Department of Building Structures and Water Supply, Associate Professor</p><p>424000. Lenina sq. 3. Yoshkar-Ola</p></bio><email xlink:type="simple">SharapovES@volgatech.net</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0002-8076-8345</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Егошин</surname><given-names>О. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Egoshin</surname><given-names>O. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>ЕГОШИН Олег Сергеевич – аспирант кафедры строительных конструкций и водоснабжения </p><p>424000, пл. Ленина, д. 3, г. Йошкар-Ола</p></bio><bio xml:lang="en"><p>EGOSHIN Oleg S. – PhD student, Department of Building Structures and Water Supply</p><p>424000. Lenina sq. 3. Yoshkar-Ola</p></bio><email xlink:type="simple">egoshin.o.s@mail.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/0009-0006-3429-5902</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Быков</surname><given-names>А. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Bykov</surname><given-names>A. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>БЫКОВ Антон Олегович – магистрант кафедры строительных конструкций и водоснабжения</p><p>424000, пл. Ленина, д. 3, г. Йошкар-Ола</p></bio><bio xml:lang="en"><p>BYKOV Anton O. – master’s student, Department of Building Structures and Water Supply</p><p>424000. Lenina sq. 3. Yoshkar-Ola</p></bio><email xlink:type="simple">anton_bykov02@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Поволжский государственный технологический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Volga State University of Technology</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>08</day><month>07</month><year>2026</year></pub-date><volume>0</volume><issue>258</issue><fpage>367</fpage><lpage>378</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Королев А.С., Шарапов Е.С., Егошин О.С., Быков А.О., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Королев А.С., Шарапов Е.С., Егошин О.С., Быков А.О.</copyright-holder><copyright-holder xml:lang="en">Korolev A.S., Sharapov E.S., Egoshin O.S., Bykov A.O.</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://izvestiya-lta.spbftu.ru/jour/article/view/761">https://izvestiya-lta.spbftu.ru/jour/article/view/761</self-uri><abstract><p>В работе представлены результаты исследования изменчивости скорости распространения ультразвуковых волн в древесине сосны (Pinus sylvestris L.) поперёк волокон по радиусу ствола. Исследования проведены на 23 образцах, выпиленных из сердцевинных досок. Скорость ультразвуковых волн измерялась прибором «Пульсар 2.2» с номинальной частотой преобразователей 60 кГц методом прохождения. Показано, что скорость распространения волн варьирует в пределах 1262–2149 м/с, при этом максимальные значения фиксируются в сердцевинной части ствола, а минимальные – вблизи тангенциальных направлений волокон. Построена комбинированная экспоненциально-линейная регрессионная модель, описывающая распределение скорости ультразвуковых волн по радиусу ствола с высокой точностью (R² = 0,92). Сравнение полученных данных с результатами других исследований подтвердило сопоставимость диапазонов скорости, измеренной как на образцах древесины, так и на растущих деревьях. Обнаруженное превышение скорости в сердцевинной части объясняется особенностями анатомической структуры ювенильной древесины и радиально-направленной анизотропией. Предложенный диапазон скоростей и регрессионная модель могут быть использованы при неразрушающем контроле деревяных конструкций из древесины сосны, включая плиты из перекрёстно-клеёной древесины, а также для корректировки данных акустической томографии и повышения точности идентификации скрытых дефектов.</p></abstract><trans-abstract xml:lang="en"><p>This study presents the results of investigating the variability of ultrasonic wave propagation velocity in Scots pine (Pinus sylvestris L.) wood across the grain along the radial direction of the stem. The research was conducted on 23 specimens cut from pithcentered boards. Ultrasonic wave velocity was measured using the Pulsar 2.2 device, equipped with transducers operating at a nominal frequency of 60 kHz, by applying the through-transmission method. The results demonstrated that the ultrasonic velocity ranged between 1262 and 2149 m/s, with the highest values observed in the pith zone and the lowest values near the tangential directions of the grain. A combined exponential–linear regression model was developed to describe the radial distribution of ultrasonic velocity, achieving high accuracy (R² = 0.92). Comparison of the obtained data with previous studies confirmed the consistency of the velocity ranges measured both in wood specimens and in standing trees. The increased velocity in the pith region is attributed to the anatomical characteristics of juvenile wood and the radially oriented anisotropy of the material.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>ультразвуковые волны</kwd><kwd>неразрушающий контроль</kwd><kwd>сосна обыкновенная</kwd><kwd>анизотропия древесины</kwd><kwd>акустическая томография</kwd></kwd-group><kwd-group xml:lang="en"><kwd>ultrasonic waves</kwd><kwd>non-destructive testing</kwd><kwd>Scots pine</kwd><kwd>wood anisotropy</kwd><kwd>acoustic tomography</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена за счет гранта Российского научного фонда № 23-16-00220, https://rscf.ru/project/23-16-00220/ с использованием оборудования ЦКП «Экология, биотехнологии и процес получения экологически чистых энергоносителей» Поволжского государственного технологического университета, г. 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