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Information × Registration Number 0216U005927, 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 come with an increase in the eccentricity of the cross-section of the shell. Product Description popup.authors Григоренко Олександр Ярославович Григоренко Ярослав Михайлович popup.nrat_date 2020-04-02 Close