CLOSED-FORM SOLUTIONS TO THE VIBROACOUSTIC RESPONSE OF STRIP STRUCTURES

This paper presents some closed form expressions for the radiated powe r from flat elastic radiating strip structures of infinite length and finite width in an ambient light acoustic medium. New analytical expre ssions for the structural displacements, the wave number transforms of the structural displacements, the far-field pressure, and the total r adiated sound power associated with an arbitrary strip that has been s ubjected to constant frequency loads including concentrated loads, bou ndary loads, or incident plane pressure waves are developed through th e method of distributed transfer functions. With the exception of the radiated power from a structure subjected to a plane pressure wave, al l of the expressions obtained are in closed form. The solutions presen ted are independent of the specific differential equations and boundar y conditions governing the structure, An example analysis of a structu re consisting of a bare aluminum strip with an active control scheme u sing boundary actuation that is subjected to an incident plane pressur e wave is performed to illustrate the advantages of the new solutions. (C) 1997 Acoustical Society America.