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<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Archiving and Interchange DTD with OASIS Tables with MathML3 v1.4 20241031//EN" "https://jats.nlm.nih.gov/archiving/1.4/JATS-archive-oasis-article1-4-mathml3.dtd">
<article xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" dtd-version="1.4" article-type="research-article" xml:lang="en"><front><journal-meta><journal-title-group><journal-title xml:lang="ru">Проблемы прочности и пластичности</journal-title></journal-title-group><issn publication-format="print">1814-9146</issn></journal-meta><article-meta><article-id pub-id-type="doi">10.32326/1814-9146-2026-88-3-79-96</article-id><article-categories><subj-group><subject>Other</subject></subj-group></article-categories><title-group><article-title xml:lang="ru">Модели деформирования стержня-полосы, соединенного с жестким опорным элементом через упругую прослойку конечной длины. 1. Модель Кирхгофа-Лява</article-title><trans-title-group xml:lang="en"><trans-title>DEFORMATION MODELS OF RODSTRIP CONNECTED WITH RIGID SUPPORT ELEMENT THROUGH ELASTIC SPACER FINAL LENGTH. 1. KIRCHHOFF – LOVE MODEL</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Паймушин</surname><given-names>В.Н.</given-names></name><name xml:lang="en"><surname>Paymushin</surname><given-names>V.N.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/><email>vpajmushin@mail.ru</email></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Шишкин</surname><given-names>В.М.</given-names></name><name xml:lang="en"><surname>Shishkin</surname><given-names>V.M.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff3"/><xref ref-type="aff" rid="aff4"/></contrib><aff-alternatives id="aff1"><aff><institution xml:lang="en">Kazan National Research Technical University n.a. A.N. Tupolev</institution><city xml:lang="en">Kazan</city><country xml:lang="en">Russia</country></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="ru">Казанский национальный исследовательский технический университет им. А.Н. Туполева</institution><city xml:lang="ru">Казань</city><country xml:lang="ru">Россия</country></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Vyatka State University</institution><city xml:lang="en">Kirov</city><country xml:lang="en">Russia</country></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="ru">Вятский государственный университет</institution><city xml:lang="ru">Киров</city><country xml:lang="ru">Россия</country></aff></aff-alternatives></contrib-group><pub-date pub-type="epub" iso-8601-date="2026-09-30"><day>30</day><month>09</month><year>2026</year></pub-date><volume>88</volume><issue>3</issue><fpage>79</fpage><lpage>96</lpage><history><date date-type="received" iso-8601-date="2026-05-19"><day>19</day><month>05</month><year>2026</year></date></history><self-uri xlink:href="http://ppp.mech.unn.ru/index.php/ppp/article/view/970" xlink:title="http://ppp.mech.unn.ru/index.php/ppp/article/view/970">http://ppp.mech.unn.ru/index.php/ppp/article/view/970</self-uri><self-uri content-type="pdf" xlink:href="publication-282d71ff-36df-4027-ba32-b0336ce388ad.pdf" xlink:title="PDF"/><abstract xml:lang="ru"><p>Построена трансформационная модель динамического деформирования стержняполосы, состоящего по длине из односторонне закрепленного и двух незакрепленных (консольных) участков. Предполагается, что стержень на закрепленном участке соединен с абсолютно жестким и неподвижным опорным элементом через упругую прослойку конечной длины, у которой отсутствуют перемещения точек соединения с опорным элементом. Перемещения точек как закрепленного, так и незакрепленных участков стержня описываются классической моделью Кирхгофа – Лява, при использовании которой введение в рассмотрение на закрепленном участке упругой трансверсально-мягкой прослойки позволяет описать процесс прохождения изгибных колебаний от одного незакрепленного участка к другому. Сформулированы условия кинематического сопряжения закрепленного и незакрепленных участков стержня, при учете которых, исходя из вариационного принципа Даламбера – Лагранжа, получены для введенных в рассмотрение участков соответствующие уравнения движения и граничные условия, а также силовые условия сопряжения участков. На закрепленном участке проведено упрощение построенных уравнений путем перехода к известной модели винклеровского основания, с помощью которых найдено точное аналитическое решение задачи о вынужденных гармонических колебаниях стержня рассматриваемого класса. Проведены численные эксперименты по влиянию степени прохождения изгибных колебаний в ненагруженную консоль дюралюминиевого стержня-полосы в зависимости от величины нормального модуля прослойки, ее толщины и длины закрепленного участка при изменении одной из данных величин и фиксированных значениях двух других параметров. Показана возможность получения решения задачи о статическом изгибе стержня при действии постоянной силы на одном из концов на основе стационарного решения уравнений движения при весьма малой частоте циклического деформирования</p></abstract><abstract xml:lang="en" abstract-type="summary"><p>A transformational model of dynamic deformation of the rodstrip was built, consisting along the length of onesided fixed and two nonfixed (solo) sections. It is assumed that the rod on the fixed section is connected to the absoluty rigid and fixed support element through an elastic layer of finite length, which does not have movements of the connection points with the support element. Alterations of points of both fixed and nonfixed sections of the rod are described by the classical Kirchhoff – Love model, when using which the introduction of an elastic transversalsoft layer into consideration on the fixed section makes it possible to describe the process of passage of bending vibrations from one nonfixed section to another. The conditions of kinematic conjugation of the fixed and loose sections of the rod are formulated, when taking into account which, based on the Dalembert – Lagrange variation principle, the corresponding equations of motion and boundary conditions are obtained for the sections introduced into consideration, as well as force conditions for conjugation of the sections. Simplification of the constructed equations was carried out at the locked section by transition to the known Winkler base model, on the basis of which an exact analytical solution to the problem of forced harmonic oscillations of the rod of the given class was found. Numerical experiments were carried out on the effect of the degree of passage of bending coforests into the unloaded console of the duralumin rodstrip depending on the value of the normal modulus of the interlayer, its thickness and the length of the fixed section when one of these values changes and fixed values of two other parameters. The possibility of obtaining a solution to the problem of static bending of the rod under the action of a constant force at one of the ends based on the stationary solution of the equations of motion at a very low frequency of cyclic deformation is shown.</p></abstract><kwd-group xml:lang="ru"><kwd>стержень-полоса</kwd><kwd>модель Кирхгофа – Лява</kwd><kwd>опорный элемент</kwd><kwd>трансверсально-мягкая прослойка</kwd><kwd>незакрепленный и закрепленный участки</kwd><kwd>трансформационная модель деформирования</kwd><kwd>вынужденные колебания</kwd><kwd>аналитическое решение.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>barstrip</kwd><kwd>Kirchhoff – Love model</kwd><kwd>support element</kwd><kwd>transversalsoft interlayer</kwd><kwd>loose and fixed sections</kwd><kwd>transformation deformation model</kwd><kwd>forced oscillations</kwd><kwd>analytical solution.</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Выполнено за счет средств РНФ (проект № 23-19-00021-П).</funding-statement></funding-group></article-meta></front><back><ref-list><ref id="ref1"><mixed-citation publication-type="other" xml:lang="ru">Algazin S.D., Selivanov I.A. 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