Dynamic Stress-Strain State Of Three-Layer Viscoelastic Plates Under Harmonic Loading And Reduction Of The Resonance Amplitude
Keywords:
dynamic stress-strain state, global resonance amplitudeAbstract
This article investigates the dynamic stress-strain state (DSSS) of a three-layer plate lying on a viscoelastic n-layer deformable half-space under a vertical harmonic load. The concept of the global resonance amplitude (GRA) is introduced, a numerical analysis of the frequency dependence of the stress amplitude (frequency response) is performed for dissipative-homogeneous and inhomogeneous mechanical systems, and the influence of the middle layer stiffness (Efill/Epl) on the resonance amplitude is established. For an acrylonitrile-duralumin pair, the maximum stress amplitude is shown to decrease from 3.2 MPa to 0.94 MPa at the "role-switching" point. A practical implementation result of the developed methodology is presented — a reduction of up to 27% in the resonance amplitude of a 24 NDS (D6300-80) pump unit
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