Abstract
The acoustic scattering from a finite bilaminar cylindrical shell is analyzed using the exact theory of three-dimensional elasticity. The two lamina are perfectly bonded having the same lateral dimension but have different radii and material properties. The finite shell is submerged in an infinite fluid medium terminated by two semi-infinite rigid cylindrical baffles. The shell has shear-diaphragm supports at the ends z = 0, L and is internally filled with an acoustic medium. It is insonified by an incident plane wave at an oblique incidence angle. The scattered acoustic farfield is evaluated for various incident wave wavenumbers, shell thicknesses, shell dimensions, radii, and material properties. A uniform steel shell in water was initially analyzed to study the influence of shell geometries on the scattered acoustic farfield. A second shell made up of an outer elastomer shell bonded to an inner steel shell was also analyzed to study the influence of elastomeric properties on acoustic scattering. [Work supported by NAVSEA Division Newport under ONR Summer Faculty Program.]
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