150504 (Осесиметричні коливання дискретно підкріплених оболонкових елементів конструкцій на пружній основі при імпульсних навантаженнях), страница 4
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Документ из архива "Осесиметричні коливання дискретно підкріплених оболонкових елементів конструкцій на пружній основі при імпульсних навантаженнях", который расположен в категории "". Всё это находится в предмете "физика" из , которые можно найти в файловом архиве . Не смотря на прямую связь этого архива с , его также можно найти и в других разделах. Архив можно найти в разделе "рефераты, доклады и презентации", в предмете "физика" в общих файлах.
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Ключевые слова: оболочка, ребристая оболочка, упругое основание, колебания, численные методы, трьохкомпонентный грунт.
ABSTRACT
Golovko K.G. Axially symmetric vsbrations of discretely reinforced shell elements of structures on elastic foundation under pulsed loads. Manuscript.
Thesis for a Candidate’s Degree in Technical sciences on speciality 01.02.04 – mechanic of deformable solids. – S.P.Timoshenko Institute of Mechanics of National Academy of Sciences of Ukraine, Kiev, 2008.
The dissertation is dedicated to solving the dynamic problems for discretely reinforsed axially symmetric shells on elastic foundation under action of pulsed forsces.
In dissertation the elaboration and realization of numerical approach to analysis of dynamic behavior of discretely reinforced shells with arial symmetry are performed. It is supposed thet the shell contacts with external medium under nonstationary loads. The equations of the shell dynamics are deduced on the basis of the S.P.Timoshenko theory in the geometrically non-linear statement with the help of the Hamilton-Ostrogradsky principle with account made for the elastic foundation action. Analytic Solution of the problem about harmonic wave propagation is obtained for the linear version of the structurally orthotropic model of the reinforsed cylindrical shell on two-parametric elastic foundation. Numerical solution of the joint problems about interaction of cylindrical and spherical shells with non-linear three-component soil obtained by the Mac-Kormic method is used for the evaluation of the elastic foundation parameters. The problems about axially symmetric vibrations of discretely reinforsed cylindrical and spherical shells on one – and two-parametric elastic foundation are solved on the on the basis of integro-differential method with the us of elaborated numerical algorithms. The analysis of influence of the ambient elastic medium property and the reinforcing ribs arrangement on the mechanical effects in the heterogeneous shell structure elements is performed.
Keywords: shell, reinforced shell, elastic foundation, vibrations, numerical methods, three-component soil.
