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Information × Registration Number 0216U005929, 0111U002032 , R & D reports Title The solution of the two-dimensional problems of the theory of the thick inhomogeneous anisotropic shell on the basis of the spline- approximation popup.stage_title Head Vlajkov Georgij Georgijovych, Registration Date 22-03-2016 Organization National Academy of Sciences of Ukraine Technical center popup.description2 Investigation of the problem of natural vibrations of rectangular shallow isotropic and orthotropic shells of variable thickness, taking into account the shear deformations and isotropic elliptical shells of constant thickness based on the method of spline approximation of unknown function. Various types of boundary conditions on the contours of the shell. The influence of the middle surface curvature on the spectrum of the natural frequencies of oscillations of shallow shells. The comparison and the analysis of natural frequencies and modes of free oscillations of shallow isotropic and orthotropic shells of constant and variable thickness. In the case of non-circular cylindrical shells found that if the weight of elliptic and circular cylindrical shells frequency of free oscillations of non-circular cylindrical shells decrease with increasing eccentricity of the cross-section of the shell. On the basis of the developed approach to the solution of two-dimensional problems of statics non-thin conical shells of variable thickness, based on the spline approximation and implementation of sustainable numerical method for solving one-dimensional problems, we studied the effect of changes in geometrical parameters on the stress-strain state of the shells. The stress state of the non-thin shells of non-circular elliptical cross section under certain boundary conditions on the ends, depending on the variation of the thickness and the degree of ellipticity of the shell. A comparative analysis of the results and the set limits of applicability of the revised theory to the solution of this class of problems. Stress analysis of orthotropic and transversely isotropic elliptical hollow cylinder and the distribution of stresses and displacements in the non-thin spherical shells, depending on the placement of a distributed load as well as the parameters change skins thickness. Product Description popup.authors Григоренко Олександр Ярославович Григоренко Ярослав Михайлович popup.nrat_date 2020-04-02 Close