Author:

Keywords:

saturated porous-media, acoustic materials, complex modulus, propagation, specimen, air, Science & Technology, Technology, Acoustics, ACOUSTIC MATERIALS, COMPLEX MODULUS, PROPAGATION, 0203 Classical Physics, 0913 Mechanical Engineering, 1201 Architecture, 3302 Building, 4017 Mechanical engineering, 5103 Classical physics

Abstract:

The dispersion relations of acoustic modes in poroelastic cylinders with and without elastic shell coating are determined and solved. The influence of elastic frame parameters and the Biot parameters on the dispersion curves is studied in the configuration with and without coating. The dispersive Rayleigh and whispering gallery waves are highly sensitive to the density and the shear modulus of the skeleton, opening a perspective for the evaluation of the mechanical parameters of poroelastic materials confined in cylindrical tubes during the manufacturing process. The predicted dispersion curves are validated with experimental results obtained by use of different experimental set-up in the case of a porous circular cylinder.