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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">10.21266/2079-4304.2025.256.451-467</article-id><article-id custom-type="elpub" pub-id-type="custom">isplta-665</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>ТЕХНОЛОГИЯ И ОБОРУДОВАНИЕ ЛЕСОЗАГОТОВОК</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>TECHNOLOGY AND EQUIPMENT OF LOGGING INDUSTRIES</subject></subj-group></article-categories><title-group><article-title>Экспериментальные исследования по определению давления на грунт колесного сортиментоподборщика ТРОМ 25</article-title><trans-title-group xml:lang="en"><trans-title>Experimental Studies to Determine the Ground Pressure of the TROM 25 Wheeled Log Picker</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2997-4947</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кацадзе</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Katsadze</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>КАЦАДЗЕ Владимир Аркадьевич – доцент кафедры технологии лесозаготовительных производств, кандидат технических наук</p><p>194021, Институтский пер., д. 5, лит. У, Санкт-Петербург</p></bio><bio xml:lang="en"><p>KATSADZE Vladimir A. – PhD (Technical), Associate Professor of the Department of Logging Technology </p><p>194021. Institute per. 5. Let. U. St. Petersburg</p></bio><email xlink:type="simple">tlzp@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/0000-0002-8507-9584</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Свойкин</surname><given-names>Ф. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Svoykin</surname><given-names>F. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>СВОЙКИН Федор Владимирович – доцент кафедры компьютерной графики и информационного права, кандидат технических наук</p><p>190121, ул. Лоцманская, д. 3, Санкт-Петербург</p><p>ResearcherID: AAC-4074-2020</p></bio><bio xml:lang="en"><p>SVOYKIN Fedor V. – PhD (Technical), Associate Professor of the Department of Computer Graphics and Information Law </p><p>190121. Lotsmanskaya str. 3. St. Petersburg</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гринкевич</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Grinkevich</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>ГРИНКЕВИЧ Всеволод Алексеевич – системный администратор </p><p>628401, ул. Инженерная, д. 23, г. Сургут</p></bio><bio xml:lang="en"><p>GRINKEVICH Vsevolod A. – System administrator </p><p>628401. Inzhenernaya str. 23. Surgut</p></bio><email xlink:type="simple">grinseva900@gmail.com</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Россихин</surname><given-names>К. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Rossikhin</surname><given-names>K. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>РОССИХИН Кирилл Вадимович – аспирант </p><p>194021, Институтский пер., д. 5, лит. У, Санкт-Петербург</p></bio><bio xml:lang="en"><p>ROSSIKHIN Kirill V. – PhD student</p><p>194021. Institute per. 5. Let. U. St. Petersburg</p></bio><email xlink:type="simple">krossihin@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Санкт-Петербургский государственный лесотехнический университет имени С.М. Кирова<country>Россия</country></aff><aff xml:lang="en">St.Petersburg State Forest Technical University<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Санкт-Петербургский государственный морской технический университет<country>Россия</country></aff><aff xml:lang="en">St.Petersburg State Marine Technical University<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru">Завод вездеходной техники «ТРОМ»<country>Россия</country></aff><aff xml:lang="en">all-terrain vehicle plant “TROM”<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>12</day><month>03</month><year>2026</year></pub-date><volume>0</volume><issue>256</issue><elocation-id>451–467</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Кацадзе В.А., Свойкин Ф.В., Гринкевич В.А., Россихин К.В., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Кацадзе В.А., Свойкин Ф.В., Гринкевич В.А., Россихин К.В.</copyright-holder><copyright-holder xml:lang="en">Katsadze V.A., Svoykin F.V., Grinkevich V.A., Rossikhin K.V.</copyright-holder><license 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/665">https://izvestiya-lta.spbftu.ru/jour/article/view/665</self-uri><abstract><p>Приведено обоснование разработки технического решения на основе промышленных снегоболотоходов на пневматических шинах сверхнизкого давления. Реализация для лесной промышленности заключается в проектировании и изготовлении исследуемого колесного сортиментоподборщика ТРОМ 25. Измерены значения контурной площади пятна контакта протектора каждого измеренного колеса колесного сортиментоподборщика ТРОМ 25. Определено максимальное нормальное давление на почву колесного сортиментоподборщика «ТРОМ 25» (колёсная формула 8×8 с колёсным оборудованием Тром – 1960×900R38, давление в шинах 50 000 Па). Указана измеренная опытным путём площадь пятна контакта колесного сортиментоподборщика «ТРОМ 25» (колёсная формула 8×8 с колёсным оборудованием Тром – 1960×900R38, давление в шинах 50 000 Па). Научной новизной для лесной промышленности обладает методика определения значения контурной площади пятна контакта протектора каждого измеренного колеса, а также определение пятна контакта пневматических шин сверхнизкого давления с конечной опорной поверхностью. В результате исследований определено реальное измеренное удельное давление колесного сортиментоподборщика «ТРОМ 25», даны рекомендации о применении результатов исследований в реальных природно-производственных условиях.</p></abstract><trans-abstract xml:lang="en"><p>This paper presents a rationale for developing a technical solution based on industrial all-terrain vehicles with ultra-low-pressure pneumatic tires. The implementation for the forestry industry consists of the design and manufacture of the studied TROM 25 wheeled timber picker. The values of the contour contact area of the tread contact patch of each measured wheel of the TROM 25 wheeled timber picker were measured. The maximum normal pressure on the soil of the TROM 25 wheeled timber picker( 8x8 wheel arrangement with Trom wheel equipment, 1960x900R38, and tire pressure of 50,000 Pa) were determined. The experimentally measured contact area of the TROM 25 wheeled timber picker (8x8 wheel arrangement with Trom wheel equipment, is indicated – 1960x900R38, and tire pressure is 50,000 Pa). A scientific innovation has been developed to determine the values of the contour contact area of the tread of each of the steering wheels, as well as to determine the contact patch of an ultra-low pressure pneumatic tire with the final support surface for forestry. The research resulted in the determination of the actual measured ground pressure of the TROM 25 wheeled timber picker, and recommendations for applying the results in real-world environmental and production conditions were provided.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>колесный сортиментоподборщик</kwd><kwd>ТРОМ 25</kwd><kwd>промышленный снегоболотоход</kwd><kwd>пневматические шины сверхнизкого давления</kwd><kwd>пятно контакта</kwd><kwd>максимально нормальное давление на почву</kwd><kwd>реальное измененное удельное давление</kwd></kwd-group><kwd-group xml:lang="en"><kwd>wheeled timber picker</kwd><kwd>TROM 25</kwd><kwd>industrial all-terrain vehicle</kwd><kwd>ultra-low-pressure pneumatic tires</kwd><kwd>contact patch</kwd><kwd>maximum normal ground pressure</kwd><kwd>actual measured ground pressure</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">Гайнуллин И.А., Зайнуллин А.Р. 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