Open AccessTHE STUDY OF ACOUSTIC CHARACTERISTICS OF THE PERFORATED AND HOMOGENOUS PLATES WITH SIMILAR GEOMETRICAL DIMENSIONS
Author(s) -
V. Kirpichnikov,
Lyudmila Drozdova,
Alexei Koscheev,
Ernst Myshinsky
Publication year - 2019
Publication title -
akustika
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.162
H-Index - 7
eISSN - 2570-8775
pISSN - 1801-9064
DOI - 10.36336/akustika20193279
Subject(s) - homogeneous , vibration , resonance (particle physics) , flexural strength , acoustics , materials science , acoustic radiation , range (aeronautics) , acoustic resonance , radiation , physics , composite material , optics , atomic physics , thermodynamics
The resonance frequencies of the flexural vibrations, input vibration excitability and acoustic radiation of the homogeneous and perforated plates were investigated. It is established that the average reduction range of the lower resonant frequency of flexural vibrations of the tested plates with the holes virtually coincides with the predictive estimate. The levels of the input vibration excitability of the perforated plate at the lower resonant frequencies exceeded the levels at the corresponding frequencies of the homogeneous plates greater than the calculated value. The levels of resonance acoustic radiation of the perforated plate were significantly less than of the homogeneous one.