Power radiated by an infinite plate subject to fluid loading and line drive

• Published in: Journal of sound and vibration Vol. 123; no. 3; pp. 437 - 450
• Main Authors: Innes, D., Crighton, D.G.
• Format: Journal Article
• Language: English
• Published: London Elsevier Ltd 22.06.1988; Elsevier
• Subjects: Exact sciences and technology; Fundamental areas of phenomenology (including applications); Physics; Solid mechanics; Structural and continuum mechanics; Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...); Thin plate; Vibration; Fluid structure interaction; Elastic plate
• ISSN: 0022-460X; 1095-8568
• DOI: 10.1016/S0022-460X(88)80161-5

Fluid-loading effects on the acoustic and vibration response of a thin elastic plate can be specified by a phase Mach number or frequency parameter M=k o/k p and an intrinsic fluid-loading parameter ε. In this paper asymptotic expressions are given for the acoustic power radiated by a thin plate under line force drive, covering the entire frequency range 0< M<∞ in the limit ε→0. These expressions reflect the balance of physical mechanisms in each of four principal frequency ranges and, for the case of steel plates with water loading, are shown to agree extremely well with previously published numerical evaluations of the acoustic power.