Total Acoustic Power of Two Concentric Clamped Circular Plates Vibrating in a Fluid
W.P. Rdzanek
University of Rzeszów, Department of Mechatronics and Control Science, Faculty of Mathematics and Natural Sciences, Prof. St. Pigonia 1, 35-310 Rzeszów, Poland
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This study focuses on the problem of sound radiation by two concentric clamped flat plates, circular and annular, into the half-space. The system of three coupled differential equations comprising two equations of motions of plates and the wave equation, is solved exactly. Vibrations of plates are axisymmetric and time-harmonic with a single excitation frequency. The initial phase difference of excitations can be nonzero. Attenuation due to fluid loading and material damping is included. Kirchoff-Love and Kelvin-Voigt theories are applied. The effect of initial phase difference of excitations on the acoustic power radiated is examined as well as errors resulting from neglecting the fluid loading.

DOI: 10.12693/APhysPolA.128.A-41
PACS numbers: 43.20.Bi, 43.20.El, 43.20.Fn, 43.20.Rz