Electrometallurgy Today (Sovremennaya Elektrometallurgiya), 2024, #3, 3-12 pages
Influence of high damping coatings on the resonant vibrations of a titanium plate
O.S. Kremenchutskyi, A.I. Ustinov
E.O. Paton Electric Welding Institute of the NAS of Ukraine
11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: kremens44@gmail.com
Abstract
The results of a study of the influence of high damping Co‒Ni and Co‒Fe coatings on the resonant vibrations of the
titanium plate-coating system are presented. It has been established that when the amplitude of the resonant vibrations
of the system increases to a certain critical value, the dependence of the characteristics of its resonant vibrations on the
parameters of external excitation becomes nonlinear. The value of the critical vibrations amplitude, at which a transition
from weakly linear to nonlinear vibrations is observed, depends on the slope of the amplitude dependence of the
damping capacity (DC) of the system: the steeper the amplitude dependence of the DC, the lower the critical amplitude
value, at which the system transition to nonlinear vibrations occurs. Nonlinearity of vibrations manifests itself both
in an abrupt change in amplitude with a slight change in the frequency of forced vibrations, and in the occurrence of
hysteresis in the amplitude-frequency dependences. The transition of a system to vibrations mode with strong nonlinearity
can affect the efficiency of suppression of resonant vibrations with large amplitude in it. 19 Ref., 2 Tabl., 10 Fig.
Keywords: damping coating, resonant vibration, amplitude-frequency dependence, damping capacity, logarithmic decrement
Received: 05.03.2024
Received in revised form: 17.06.2024
Accepted: 06.09.2024
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