Details

Autor(en) / Beteiligte

• Wisse, C. J.
• Smeulders, D. M. J.
• Chao, G.
• van Dongen, M. E. H.

Titel

Guided wave modes in porous cylinders: Theory

Ist Teil von

• The Journal of the Acoustical Society of America, 2007-10, Vol.122 (4), p.2049-2056

Ort / Verlag

Woodbury, NY: Acoustical Society of America

Erscheinungsjahr

2007

Quelle

American Institute of Physics

Beschreibungen/Notizen

• The classical theory of wave propagation in elastic cylinders is extended to poro-elastic mandrel modes. The classical theory predicts the existence of undamped L modes and damped C, I, and Z modes. These waves also appear in poro-elastic mandrels, but all of them become damped because of viscous effects. The presence of the Biot slow bulk wave in the poro-elastic material is responsible for the generation of additional mandrel modes. One of them was already discussed by Feng and Johnson, and the others can be grouped together as so-called D modes. The damping of these D modes is at least as high as the damping of the free-field slow wave.