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THE DETECTION OF THE STRUCTURE-ORIGINATED WAVES AND THE FLUID-ORIGINATED WAVES IN AN ELASTIC CYLINDRICAL FLUID-FILLED SHELL THROUGH THE ANALYSIS OF THE PHASE VELOCITIES
Ter-akopyants G.L. 1, Ter-akopyants L.G. 1

1. Sankt-Petersburg State Marine Technical University

Abstract:

This paper considers the propagation of elastic waves in a cylindrical compressible fluid-filled shell for non-axisymmetric mode, for breathing mode and for beam mode. The phase velocities were compared for the compressible fluid-filled shell, for the incompressible fluid-filled shell and for the absolutely rigid cylindrical compressible fluid-filled duct. It allows us to identify the mainly structure-originated waves and the mainly fluid-originated waves. The method is based on the fact, that in the incompressible fluid-filled shell only structure-originated waves can propagate and in the rigid compressible fluid-filled duct only fluid-originated waves can propagate

Keywords: elastic cylindrical fluid-filled shell; wave propagation; phase velocity

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