Open AccessAcoustic scattering from the finite periodically ribbed two concentric cylindrical shells
Author(s) -
An Pan,
Fan Jun,
Bin Wang,
Zhigang Chen,
Gangtie Zheng
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.214301
Subject(s) - scattering , concentric , physics , shell (structure) , plane (geometry) , spectral line , plane wave , optics , equations of motion , excited state , spherical shell , classical mechanics , mechanics , materials science , geometry , atomic physics , mathematics , astronomy , composite material
Acoustic scattering from the submerged finite periodically ribbed two concentric cylindrical shells, insonified by an incident plane wave, is studied. Motion of the shell is described by Donnell equations, while the motion of the disks is described by thin plate motion equations and plane ströss equations ignoring the effects of axial forces on the disks. Through angle-frequency spectra, besides the elastic waves of the shells, the contributions of the fluid between the inner and outer shells and the interaction of the inner and outer shells with the disks play an important role in the far scattering field. There are fine echo waves such as Bragg scattering and fluid-added waves excited on the angle-frequency spectra. Finally the theories are verified by experiments.