Structural Mechanics of Engineering Constructions and BuildingsStructural Mechanics of Engineering Constructions and BuildingsСтроительная механика инженерных конструкций и сооружений1815-52352587-8700Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)2301010.22363/1815-5235-2020-16-1-54-61Numerical methods of structures’ analysisЧисленные методы расчета конструкцийResearch ArticleNumerical analysis of stability of the stiffened plates subjected aliquant critical loadsЧисленный анализ устойчивости подкрепленных пластин с некратными критическими нагрузкамиManuylovGaik A.МануйловГайк Александрович

Ph.D., Associate Professor

кандидат технических наук, доцент кафедры cтроительной механики

kositsyn-s@mail.ru9390-7610KositsynSergey B.КосицынСергей Борисович

adviser of the RAACS, D.Sc. in Engineering, Professor of the Department of Theoretical Mechanics

советник РААСН, доктор технических наук, профессор, заведующий кафедрой теоретической механики

kositsyn-s@mail.ruGrudtsynaIrina E.ГрудцынаИрина Евгеньевна

postgraduate student of the Department of Theoretical Mechanics

аспирант кафедры теоретической механики

kositsyn-s@mail.ruRussian University of TransportРоссийский университет транспорта15122020161VOL 16, NO1 (2020)ТОМ 16, №1 (2020)546127022020Copyright ©; 2020, Manuylov G.A., Kositsyn S.B., Grudtsyna I.E.Copyright ©; 2020, Мануйлов Г.А., Косицын С.Б., Грудцына И.Е.2020Manuylov G.A., Kositsyn S.B., Grudtsyna I.E.Мануйлов Г.А., Косицын С.Б., Грудцына И.Е.http://creativecommons.org/licenses/by/4.0https://journals.rudn.ru/structural-mechanics/article/view/23010

The aim of the work is to research the precritical and postcritical equilibrium of the stiffened plates subjected aliquant critical loads. Methods. The finiteelement complex MSC PATRAN - NASTRAN was used in the paper. To simulate the plates, flat four-node elements were used. Calculations taking into account geometric nonlinearity were carried out. The material of the shells was considered absolutely elastic. Results. A technique has been developed to study the stability of reinforced longitudinally compressed plates; the critical forces of the stiffened plates of various thicknesses had been calculated. Graphs of deflections dependences on the value of the compressive load had been constructed. The influence of initial geometric imperfections on the value of the critical loads for stiffened plates has been investigated.

Цели. Исследование докритических и начальных послекритических равновесий подкрепленных продольно сжатых пластин с некратными критическими нагрузками. Методы. Для решения поставленных задач использован конечно-элементный комплекс MSC PATRAN - NASTRAN. Подкрепленные пластины смоделированы плоскими четырехузловыми элементами. Проведены расчеты с учетом геометрической нелинейности. Материал считался абсолютно упругим. Результаты. Разработана методика исследования устойчивости подкрепленных продольно сжатых пластин, определены критические силы подкрепленных пластин различных толщин. Построены графики зависимостей прогибов от величин сжимающих нагрузок. Исследовано влияние начальных геометрических несовершенств на величины критических сил для подкрепленных пластин.

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