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 <front>
  <journal-meta>
   <journal-id journal-id-type="publisher-id">Forestry Engineering Journal</journal-id>
   <journal-title-group>
    <journal-title xml:lang="en">Forestry Engineering Journal</journal-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Лесотехнический журнал</trans-title>
    </trans-title-group>
   </journal-title-group>
   <issn publication-format="print">2222-7962</issn>
  </journal-meta>
  <article-meta>
   <article-id pub-id-type="publisher-id">104695</article-id>
   <article-id pub-id-type="doi">10.34220/issn.2222-7962/2025.3/13</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>Технологии. Машины и оборудование</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject>TECHNOLOGIES. MACHINERY AND EQUIPMENT</subject>
    </subj-group>
    <subj-group>
     <subject>Технологии. Машины и оборудование</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">Mathematical model and methodology of express assessment crisis-deformed state of the machine frame for the care of forest crops</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Математическая модель и методика экспресс оценки  напряженно-деформированного состояния рамы машины  для ухода за лесными культурами</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Бухтояров</surname>
       <given-names>Леонид Дмитриевич</given-names>
      </name>
      <name xml:lang="en">
       <surname>Bukhtoyarov</surname>
       <given-names>Leonid Dmitrievich</given-names>
      </name>
     </name-alternatives>
     <email>vglta-mlx@yandex.ru</email>
     <bio xml:lang="ru">
      <p>кандидат технических наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>candidate of technical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-1"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Гнусов</surname>
       <given-names>Максим Александрович</given-names>
      </name>
      <name xml:lang="en">
       <surname>Gnusov</surname>
       <given-names>Maksim Aleksandrovich</given-names>
      </name>
     </name-alternatives>
     <email>mgnusov@yandex.ru</email>
     <xref ref-type="aff" rid="aff-2"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Лысыч</surname>
       <given-names>Михаил Николаевич</given-names>
      </name>
      <name xml:lang="en">
       <surname>Lysych</surname>
       <given-names>Mikhail Nikolaevich</given-names>
      </name>
     </name-alternatives>
     <email>miklynea@yandex.ru</email>
     <bio xml:lang="ru">
      <p>кандидат технических наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>candidate of technical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-1"/>
    </contrib>
   </contrib-group>
   <aff-alternatives id="aff-1">
    <aff>
     <institution xml:lang="ru">Воронежский государственный лесотехнический университет имени Г.Ф. Морозова</institution>
    </aff>
    <aff>
     <institution xml:lang="en">Voronezh State University of Forestry and Technologies named after G.F. Morozov</institution>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-2">
    <aff>
     <institution xml:lang="ru">Воронежский государственный лесотехнический университет имени Г.Ф. Морозова</institution>
     <city>Воронеж</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Воронежский государственный лесотехнический университет имени Г.Ф. Морозова</institution>
     <city>Воронеж</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <pub-date publication-format="print" date-type="pub" iso-8601-date="2025-09-25T00:00:00+03:00">
    <day>25</day>
    <month>09</month>
    <year>2025</year>
   </pub-date>
   <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2025-09-25T00:00:00+03:00">
    <day>25</day>
    <month>09</month>
    <year>2025</year>
   </pub-date>
   <volume>15</volume>
   <issue>3</issue>
   <fpage>201</fpage>
   <lpage>216</lpage>
   <history>
    <date date-type="received" iso-8601-date="2025-06-02T00:00:00+03:00">
     <day>02</day>
     <month>06</month>
     <year>2025</year>
    </date>
    <date date-type="accepted" iso-8601-date="2025-09-15T00:00:00+03:00">
     <day>15</day>
     <month>09</month>
     <year>2025</year>
    </date>
   </history>
   <self-uri xlink:href="http://lestehjournal.ru/sites/default/files/journal_pdf/201-216.pdf">http://lestehjournal.ru/sites/default/files/journal_pdf/201-216.pdf</self-uri>
   <abstract xml:lang="ru">
    <p>При разработке лесных машин и орудий активно используют метод конечных элементов (МКЭ), для расчета влияния внешних нагрузок на прочностные и частотные характеристики конструкций. Как правило для этого используются дорогостоящие коммерческие пакеты программ ANSYS, LS-DYNA и др. На ранних стадиях проектирования проверка неудовлетворительных решений дорогостоящими пакетами программ не является целесообразной. Авторами разработан метод, экспресс-оценки напряжённо-деформированного состояния (НДС) протестированный на конструкции кустореза, который работает прямо с геометрической моделью, выполненной в системе автоматизированного проектирования (САПР) и предоставляет возможность инженеру получать показатели прочности и жёсткости, имеющие важное значение для технологического процесса. Предлагаемый метод включает в себя: импорт САПР модели в формате STL; вокселизацию и построение регулярной сетки HEX8 с управляемым шагом h; задание условий Дирихле в зоне заделки и эквивалентной нагрузки Неймана через распределённое давление на нагруженных участках; сборку и решение линейно-упругой задачи; вычисление полей напряжений и эквивалентных напряжений Мизеса, а также оценку максимальных перемещений; экспорт результатов для последующего анализа. На примере балки кустореза продемонстрирована работа экспресс-методики. Установлено что при заданных нагрузках F=3000 Н максимальное напряжение у балки L=500, 40х40x3 мм составило 268 МПа что превышает предел текучести стали – 220 МПа. Методика позволила отбраковать эту балку и заменить на новую, с параметрами L=500, 80х80x3 мм, получены напряжения 58,3 МПа. Таким образом неудовлетворительный вариант был исключен ещё до тяжёлых мультифизических расчётов. Представленная методика предназначена для предварительной отбраковки слабых решений для снижения стоимости дальнейшей разработки лесных машин. Область применения – крупногабаритные механические узлы лесных машин и орудий.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>In the development of forestry machines and tools, the finite element method (FEM) is actively used to calcu-late the effect of external loads on the strength and frequency characteristics of structures. As a rule, expensive com-mercial software packages ANSYS, LS-DYNA, etc. are used for this. At the early stages of design, checking unsatisfac-tory solutions with complex software packages is not advisable. The authors have developed a method for expressly assessing the stress-strain state (SSS) of tested brush cutter designs, working directly with a geometric model created in a computer-aided design (CAD) system and allowing the engineer to obtain strength and rigidity indicators that are im-portant for the technological process. The proposed method includes: import of a CAD model in STL format; voxeliza-tion and construction of a regular HEX8 grid with a controlled step h; setting Dirichlet conditions in the embedment zone and the equivalent Neumann load through the distributed pressure on the loaded areas; assembly and solution of a linear elastic problem; calculation of stress fields and von Mises equivalent stresses, as well as assessment of maxi-mum displacements; export of results for subsequent analysis. The express method is demonstrated using a brush cut-ter beam as an example. It was found that under the given loads F=3000 N, the maximum stress in the beam L=500, 40x40x3 mm was 268 MPa, and the yield strength was 220 MPa. The method allows to reject this beam and replace it with a new one, with parameters L=500, 80x80x3 mm, the resulting stress was 58.3 MPa. Thus, the unsatisfactory op-tion was excluded even before the difficult multiphysical calculations.. The presented method is intended for prelimi-nary rejection of weak solutions to reduce the cost of further development of forestry machines. The scope of applica-tion is large-sized mechanical units of forestry machines and tools.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>кусторез</kwd>
    <kwd>уход за лесными культурами</kwd>
    <kwd>лесные машины</kwd>
    <kwd>методика</kwd>
    <kwd>математическое моделирование</kwd>
    <kwd>метод конечных элементов (МКЭ)</kwd>
    <kwd>системы автоматизированного проектирования (САПР).</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>brush cutter</kwd>
    <kwd>care of forest crops</kwd>
    <kwd>forestry machines</kwd>
    <kwd>methodology</kwd>
    <kwd>mathematical modeling</kwd>
    <kwd>finite element method (FEM)</kwd>
    <kwd>computer-aided design systems (CAD).</kwd>
   </kwd-group>
   <funding-group>
    <funding-statement xml:lang="ru">Исследование выполнено за счет гранта Российского научного фонда №25-19-00876, https://rscf.ru/project/25-19-00876/.</funding-statement>
    <funding-statement xml:lang="en">Mathematical model and methodology of express assessment crisis-deformed state of the machine frame for the care of forest crops</funding-statement>
   </funding-group>
  </article-meta>
 </front>
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