Sound radiation of the resonator in the form of a vibrating circular plate embedded in the outlet of the circular cylindrical cavity. (English) Zbl 1360.74103
Summary: The Neumann axisymmetric boundary value problem is considered for a vibrating thin clamped circular plate embedded in the flat rigid screen in the outlet of the circular cylindrical cavity. It is assumed that the two pistons, one cylindrical and the other one annular/circular, are vibrating inside the cavity with the same single frequency and different initial phases. The pistons are the only sources of excitation of the fluid. The acoustic pressure difference on both sides of the plate forces its vibrations. The acoustic waves are radiated into the half-space above it. A rigorous theoretical analysis of sound radiation has been performed based on the exact solution of the problem of free vibrations of the plate. The system of three coupled partial differential equations is solved. They are the two Helmholtz equations for the cavity and for the half-space, and the equation of motion of the plate. Consequently, the acoustic pressure distribution in both spaces is presented as well as the acoustic power radiated.
MSC:
| 74K20 | Plates |
| 74H45 | Vibrations in dynamical problems in solid mechanics |
| 74J05 | Linear waves in solid mechanics |
| 76Q05 | Hydro- and aero-acoustics |
Keywords:
Neumann boundary value problem; clamped circular plate; acoustic pressure; acoustic power; modal coefficients; acoustic impedance; circular cylindrical cavity; fluid-structure interactionsReferences:
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