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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">vdgtu</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Дагестанского государственного технического университета. Технические науки</journal-title><trans-title-group xml:lang="en"><trans-title>Herald of Dagestan State Technical University. Technical Sciences</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2073-6185</issn><issn pub-type="epub">2542-095X</issn><publisher><publisher-name>Daghestan State Technical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21822/2073-6185-2018-45-3-8-17</article-id><article-id custom-type="elpub" pub-id-type="custom">vdgtu-586</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>ФИЗИКО-МАТЕМАТИЧЕСКИЕ НАУКИ . МЕХАНИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICAL-MATEMATICAL SCIENCE. MECHANICS</subject></subj-group></article-categories><title-group><article-title>СВОБОДНЫЕ ПРОДОЛЬНЫЕ КОЛЕБАНИЯ ВЕРТИКАЛЬНОГО СТЕРЖНЯ С ДИСКРЕТНЫМИ МАССАМИ ПРИ НАЛИЧИИ СИЛ ДЕМПФИРОВАНИЯ</article-title><trans-title-group xml:lang="en"><trans-title>FREE LONGITUDINAL VIBRATIONS OF A VERTICAL ROD WITH DISCRETE MASSES WITH DAMPING FORCES</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Культербаев</surname><given-names>Х. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Kulterbaev</surname><given-names>H. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>360004, г. Нальчик, ул. Чернышевского, 173.</p><p>Культербаев Хусен Пшимурзович - доктор технических наук, профессор кафедры «Строительные конструкции и механика».</p></bio><bio xml:lang="en"><p>173 Chernyshevsky Str., Nalchik 3360004.</p><p>Husen P. Kulterbaev –Dr. Sci. (Technical), Prof., Department of Building construction and mechanics.</p><p> </p></bio><email xlink:type="simple">kulthp@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Абдул Салам</surname><given-names>И. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Abdul-Salam</surname><given-names>I. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>360004, г. Нальчик, ул. Чернышевского, 173.</p><p>Абдул-Салам Игаб Мазен – магистрант.</p></bio><bio xml:lang="en"><p>173 Chernyshevsky Str., Nalchik 3360004.</p><p> Abdul-Salam Igab Mazen – undergraduate.</p></bio><email xlink:type="simple">ehabmazenabdulsalam@hotmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пайзулаев</surname><given-names>М. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Payzulaev</surname><given-names>M. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>367026, г. Махачкала, пр. Имама Шамиля, 70.</p><p>Пайзулаев Магомед Муртазалиевич - кандидат технических наук, доцент, заведующий кафедрой сопротивления материалов, теоретической и строительной механики.</p></bio><bio xml:lang="en"><p>70 I. Shamil Ave, Makhachkala 367026.</p><p>Magomed M. Payzulaev – Cand. Sci. (Technical), As. Prof., Head of the Department Resistance of Materials, Theoretical and Construction Mechanics.</p></bio><email xlink:type="simple">smdstu@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Кабардино-Балкарский государственный университет им. Х.М. Бербекова.</institution><country>Россия</country></aff><aff xml:lang="en"><institution>H.M. Berbekov Kabardino-Balkaria State University.</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Дагестанский государственный технический университет.</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Daghestan State Technical University.</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>12</day><month>05</month><year>2019</year></pub-date><volume>45</volume><issue>3</issue><fpage>8</fpage><lpage>17</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Культербаев Х.П., Абдул Салам И.М., Пайзулаев М.М., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Культербаев Х.П., Абдул Салам И.М., Пайзулаев М.М.</copyright-holder><copyright-holder xml:lang="en">Kulterbaev H.P., Abdul-Salam I.M., Payzulaev M.M.</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.dgtu.ru/jour/article/view/586">https://vestnik.dgtu.ru/jour/article/view/586</self-uri><abstract><sec><title>Цель</title><p>Цель. Рассматриваются продольные колебания вертикального стержня континуально-дискретной системы при кинематических сейсмических возмущениях в виде стационарного случайного процесса.</p></sec><sec><title>Метод</title><p>Метод. Предложен и реализован метод определения дисперсии выходного процесса перемещений, использующий представление входного случайного процесса в виде суммы гармонических детерминированных возмущений.</p></sec><sec><title>Результат</title><p>Результат. Определена функция зависимости дисперсии перемещений от продольной координаты. Продольные колебания вертикальных стержней, находящихся вблизи эпицентра землетрясений, являются опасными для их прочности и устойчивости. Методы конечных разностей и координатного спуска позволяют создавать универсальные алгоритмы и компьютерные программы, легко решающие сложные спектральные задачи.</p></sec><sec><title>Вывод</title><p>Вывод. До настоящего времени исследования о случайных колебаниях зданий и строительных сооружений, а также и нормативные документы посвящались горизонтальным сейсмическим воздействиям и вызванным ими поперечным изгибным колебаниям. Примеры свидетельствуют о необходимости расширения тематики исследований с включением и других типов колебаний: комбинаций продольных с поперечными, угловыми, крутильными, пара-метрическими и т. д. Данную разработку можно легко адаптировать к колебаниям стержней переменного сечения, к колебаниям континуально-дискретных стержней.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Objectives</title><p>Objectives. The longitudinal oscillations of a vertical rod of a continually discrete system with kinematic seismic disturbances in the form of a stationary random process are considered.</p></sec><sec><title>Method</title><p>Method. A method for determining the variance of the output process of displacements, using the representation of the input random process as a sum of harmonic deterministic perturbations, is proposed and implemented.</p></sec><sec><title>Result</title><p>Result. The dependence function of the dispersion of displacements on the longitudinal coordinate is determined. Longitudinal vibrations of vertical rods near the epicenter of earthquakes are dangerous for their strength and stability. The methods of finite differences and coordinate descent allow you to create universal algorithms and computer programs that easily solve complex spectral problems.</p></sec><sec><title>Conclusion</title><p>Conclusion. To date, research on random vibrations of buildings and structures, as well as regulatory documents, has been devoted to horizontal seismic effects and transverse bending vibrations caused by them. Examples indicate the need to expand the scope of research with the inclusion of other types of vibrations: combinations of longitudinal with transverse, angular, torsional, parametric, etc. This design can be easily adapted to vibrations of rods of variable cross section, to vibrations of continually discrete rods.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>продольные колебания</kwd><kwd>свободные колебания</kwd><kwd>дискретные массы</kwd><kwd>демпфирование колебаний</kwd><kwd>метод конечных разностей</kwd></kwd-group><kwd-group xml:lang="en"><kwd>longitudinal oscillations</kwd><kwd>free oscillations</kwd><kwd>discrete masses</kwd><kwd>vibration damping</kwd><kwd>finite difference method</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">Корчинский В.Л., Бородин Л.А. и др. Сейсмостойкое строительство зданий. 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