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ORIGINAL PAPER
Dynamic Vibration Extinguished on a Viscously Elastic Base
1
Navoi State Mining Institute, Higher Mathematics Department, Galaba Shokh Street, Navoi, Uzbekistan
2
Navoi State Mining Institute, Mechanical Engineering Department, Galaba Shokh Street, Navoi, Uzbekistan
Online publication date: 2021-06-22
Publication date: 2021-06-01
International Journal of Applied Mechanics and Engineering 2021;26(2):1-10
KEYWORDS
dynamic dampersoscillationsviscoelastic plateintegro-differential equationamplitude-frequency dependenceBoltzmann-Voltaire integral
ABSTRACT
The aim of the work is to develop algorithms and a set of programs for studying the dynamic characteristics of viscoelastic thin plates on a deformable base on which it is installed with several dynamic dampers. The theory of thin plates is used to obtain the equation of motion for the plate. The relationship between the efforts and the stirred plate obeys in the hereditary Boltzmann Voltaire integral. With this, a system of integro-differential equations is obtained which is solved by the method of complex amplitudes. As a result, a transcendental algebraic equation was obtained to determine the resonance frequencies, which is solved numerically by the Muller method. To determine the displacement of the point of the plate with periodic oscillations of the base of the plate, a linear inhomogeneous algebraic equation was obtained, which is solved by the Gauss method. The amplitude - frequency response of the midpoint of the plate is constructed with and without regard to the viscosity of the deformed element. The dependence of the stiffness of a deformed element on the frequency of external action is obtained to ensure optimal damping of vibrational vibrations of the plate.
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