Accession Number : AD0761618

Title :   Scattering of Sound by a Viscoelastic, Cylindrical Shell.

Descriptive Note : Research rept.,

Corporate Author : NAVAL UNDERSEA CENTER SAN DIEGO CALIF

Personal Author(s) : Hageman,D. H. ; Glass,V. L.

Report Date : MAY 1973

Pagination or Media Count : 27

Abstract : The pressure in the scattered wave resulting from irradiation of an infinitely long, circularly cylindrical, thin, isotropic, viscoelastic shell by a plane, monochromatic sound wave is calculated. The shell is assumed to be freely suspended in an ideal fluid, and to enclose a second, ideal fluid. The motion of the shell is described by means of Lagrange's equations, altered so as to account for viscoelasticity. The result for the scattered wave has the form of that for the elastic case except that an expression involving elastic constants is replaced by an impedance function involving viscoelastic parameters. Some properties of this impedance function are drawn from electrical circuit theory and used in discussing the usefulness of the viscoelastic parameters relative to modifying the scattered wave. (Author)

Descriptors :   (*UNDERWATER SOUND, SCATTERING), (*UNDERWATER OBJECTS, VIBRATION), ELASTIC SHELLS, CYLINDRICAL BODIES, VISCOELASTICITY, EQUATIONS OF MOTION, KINETIC ENERGY, POTENTIAL ENERGY

Subject Categories : Acoustic Detection and Detectors
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE