Open AccessParametric vibrations of viscoelastic orthotropic cylindrical panels of variable thickness
Author(s) -
Bakhodir Normuminov,
Rustamkhan Abdikarimov,
Mirziyod Mirsaidov,
Dadakhan Khodzhaev,
Bakhadir Мirzaev
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/869/5/052034
Subject(s) - orthotropic material , vibration , parametric statistics , galerkin method , viscoelasticity , ordinary differential equation , nonlinear system , polynomial , buckling , differential equation , structural engineering , mathematical analysis , mathematics , materials science , physics , engineering , acoustics , composite material , finite element method , statistics , quantum mechanics
In modern engineering and construction, thin-walled plates and shells of variable thickness, subjected to various static and dynamic loads, are widely used as structural elements. Advances in the technology of manufacturing thin-walled structural elements of any shape made it possible to produce structures with predetermined patterns of thickness variation. Calculations of strength, vibration and stability of such structures play an important role in design of modern apparatuses, machines and structures. The paper considers nonlinear vibrations of viscoelastic orthotropic cylindrical panels of variable thickness under periodic loads. The equation of motion for cylindrical panels is based on the Kirchhoff-Love hypothesis in a geometrically nonlinear statement. Using the Bubnov-Galerkin method, based on a polynomial approximation of deflections, the problem is reduced to the study of a system of ordinary integro-differential partial differential equations, where time is an independent variable. The solution to the resulting system is found by a numerical method based on the feature elimination in the Koltunov-Rzhanitsyn kernel used in the calculations. The behavior of a cylindrical panel with a wide range of changes in physico-mechanical and geometrical parameters is investigated.