Scattering of acoustic waves by finite elastic cylinders immersed in water

Abstract

Backscattering measurements using short acoustic pulses were made for finite elastic cylinders immersed in water. These solid aluminum cylinders were terminated with solid hemispherical caps. The overall length of the cylinders is four times the radius. For frequency scaling the factor 12kl (or 2ak) was used. Measurements were made perpendicular to the cylinder axis, end on, and at 45°. Results ranging from less than 4.0 to greater than 5.0 in 12kl were compared with the theoretical predictions using a T-matrix formulation made by Varadan, Varadan, and Flax [V. V. Varadan, V. K. Varadan, and L. Flax, J. Acoust. Soc. Am. 60, S81 (1979)].