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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">sibadi</journal-id><journal-title-group><journal-title xml:lang="ru">Научный рецензируемый журнал "Вестник СибАДИ"</journal-title><trans-title-group xml:lang="en"><trans-title>The Russian Automobile and Highway Industry Journal</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2071-7296</issn><issn pub-type="epub">2658-5626</issn><publisher><publisher-name>The Siberian State Automobile and Highway University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26518/2071-7296-2022-19-2-144-155</article-id><article-id custom-type="elpub" pub-id-type="custom">sibadi-1429</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>ТРАНСПОРТНОЕ, ГОРНОЕ И СТРОИТЕЛЬНОЕ МАШИНОСТРОЕНИЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>TRANSPORT, MINING AND BUILDING MACHINERY ENGINEERING</subject></subj-group></article-categories><title-group><article-title>Условие квазинулевой жесткости статической силовой характеристики параллелограммного механизма виброзащитной системы сиденья</article-title><trans-title-group xml:lang="en"><trans-title>Quasi-zero rigidity condition for static force characteristic of parallelogram mechanism for seat vibration protection system</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5104-7568</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Корытов</surname><given-names>М. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Korytov</surname><given-names>M. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Корытов Михаил Сергеевич – д-р техн. наук, доц.</p><p>г. Омск</p></bio><bio xml:lang="en"><p>Mikhail S. Korytov – Dr. of Sci., Associate Professor</p><p>Omsk</p></bio><email xlink:type="simple">kms142@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/0000-0002-0631-564X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кашапова</surname><given-names>И. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Kashapova</surname><given-names>I. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кашапова Ирина Евгеньевна – аспирант</p><p>г. Омск</p></bio><bio xml:lang="en"><p>Irina E. Kashapova – Post-graduate student of the Process Automation and Electrical Engineering Department</p><p>Omsk</p></bio><email xlink:type="simple">iriska-97-17-13@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/0000-0002-3084-2271</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Щербаков</surname><given-names>В. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Shcherbakov</surname><given-names>V. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Щербаков Виталий Сергеевич – д-р техн. наук, проф.</p><p>г. Омск</p></bio><bio xml:lang="en"><p>Vitaliy S. Shcherbakov – Dr. of Sci., Professor</p><p>Omsk</p></bio><email xlink:type="simple">sherbakov_vs@sibadi.org</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Сибирский государственный автомобильно-дорожный университет (СибАДИ)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Siberian State Automobile and Highway University (SibADI)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>19</day><month>05</month><year>2022</year></pub-date><volume>19</volume><issue>2</issue><fpage>144</fpage><lpage>155</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Корытов М.С., Кашапова И.Е., Щербаков В.С., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Корытов М.С., Кашапова И.Е., Щербаков В.С.</copyright-holder><copyright-holder xml:lang="en">Korytov M.S., Kashapova I.E., Shcherbakov V.S.</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://vestnik.sibadi.org/jour/article/view/1429">https://vestnik.sibadi.org/jour/article/view/1429</self-uri><abstract><p>Введение. Снижение вибрационных воздействий на операторов машин является актуальной задачей, позволяет минимизировать влияние вибраций на здоровье, повысить работоспособность и внимание. Могут быть повышены точность и производительность работ. Проблема защиты от вибраций актуальна для всех видов машин, рабочие органы которых взаимодействуют с грунтом и дорожным покрытием. Одним из направлений снижения воздействий, наряду с виброзащитой кабин, является разработка систем виброзащиты сидений операторов. Перспективным является применение эффекта квазинулевой жесткости, что позволяет эффективно подавлять низкочастотные колебания. Для предложенной конструкции на основе параллелограммного механизма необходимо определить условие горизонтальности среднего участка статической силовой характеристики.Материалы и методы. Для разработанной расчетной схемы с использованием известных силовых статических и геометрических соотношений выведены обладающие новизной аналитические зависимости между параметрами исходных данных и вертикальной подъемной силой механизма. К исходным параметрам относятся линейные размеры механизма, размер зоны квазинулевой жесткости, масса кресла с оператором и жесткость пружины. При выводе аналитических зависимостей использовались координаты подвижных и неподвижных относительно собственного основания точек механизма.Результаты. Применение разработанных аналитических зависимостей позволяет для заданных параметров исходных данных построить статическую силовую характеристику механизма. Средний участок характеристики близок к горизонтальному, но в общем случае не является горизонтальным. В качестве примера для набора значений исходных данных приведена статическая характеристика, средняя часть которой не горизонтальна. Приравнивание значений вертикальной силы механизма в левой и правой граничной точках средней части характеристики позволило вывести аналитические зависимости обеспечения квазинулевой жесткости.Обсуждение и заключение. Полученные аналитические выражения обеспечения горизонтальности среднего участка статической силовой характеристики были верифицированы. Применение выведенных условий уменьшает на единицу число параметров исходных данных. Увеличение двух размерных параметров механизма существенно уменьшает требуемую жесткость пружины механизма, что снижает металлоемкость.</p></abstract><trans-abstract xml:lang="en"><p>Introduction. Reducing vibration effects on machine operators is an urgent task; it allows to minimize the impact of vibrations on health, increase efficiency and attention. Accuracy and productivity can be improved. The problem of vibration protection is relevant for all types of machines, the working bodies of which interact with the soil and road surface. One of the impact reduction directions, along with vibration protection of cabs, is the development of vibration protection systems for operator seats. It is promising to use the effect of quasi-zero rigidity, which makes it possible to effectively damp low-frequency oscillations. For the proposed design based on a parallelogram mechanism, it is necessary to determine the condition for the horizontalness of the middle section of the static power characteristic.Materials and Methods. For the developed design scheme, using well-known power static and geometric relationships, novel analytical relationships between the parameters of the initial data and the vertical lifting force of the mechanism were derived. The initial parameters include the linear dimensions of the mechanism, the size of the quasi-zero rigidity zone, the weight of the chair with the operator, and the spring stiffness. When deriving analytical dependencies, the coordinates of the points of the mechanism moving and stationary relative to their own base were used.Results. The use of the developed analytical dependencies allows, for the given parameters of the initial data, to build a static power characteristic of the mechanism. The middle section of the characteristic is close to horizontal, but in general it is not horizontal. As an example, a static characteristic is given for a set of initial data values, the middle part of which is not horizontal. Equating the values of the vertical force of the mechanism at the left and right boundary points of the middle part of the characteristic made it possible to determine analytical dependences for ensuring quasi-zero rigidity.Discussion and conclusions. The obtained analytical expressions for ensuring the horizontalness of the middle section of the static power characteristic were verified. Applying the derived conditions decreases the number of parameters in the original data by one. An increase in the two dimensional parameters of the mechanism significantly reduces the required rigidity of the mechanism spring, which reduces the metal consumption.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>вибрации</kwd><kwd>виброзащита</kwd><kwd>статическая характеристика</kwd><kwd>аналитический</kwd><kwd>квазинулевая жесткость</kwd></kwd-group><kwd-group xml:lang="en"><kwd>vibration</kwd><kwd>vibration protection</kwd><kwd>static characteristic</kwd><kwd>analytical</kwd><kwd>quasi-zero rigidity</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Авторы статьи выражают благодарность за нелегкий труд и экспертное мнение рецензенту, работавшему с данной статьей.</funding-statement><funding-statement xml:lang="en">The authors of the article express their gratitude for the hard work and expert opinion to the reviewer who worked with this article.</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">Korchagin P., Teterina I., Korchagina E. 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