Accession Number : AD0774699

Title :   Acoustic Radiation from a Nonconcentric Circular Cylinder,

Corporate Author : STATE UNIV OF NEW YORK BUFFALO DEPT OF ENGINEERING SCIENCE

Personal Author(s) : Shaw,Richard Paul ; Tai,George

Report Date : DEC 1973

Pagination or Media Count : 35

Abstract : The effect of a nonconcentricity of inner and outer surfaces of a circular cylindrical 'acoustic' shell submerged in an infinite acoustic medium is considered. The shell is driven by an internal time harmonic pressure in a jth spatial mode. First-order effects of the nonconcentricity introduce 'nearest neighbor' modes, i.e., (j + 1) and (j - 1) spatial modes. Numerical values are calculated for a particular thin shell geometry--these results indicate a negligible effect for these nonconcentricities which may reasonably be expected. A thick walled shell may allow for more substantial effects since larger nonconcentricities are possible. (Author)

Descriptors :   *UNDERWATER OBJECTS, *CYLINDRICAL BODIES, *ACOUSTIC WAVES, *UNDERWATER SOUND, SERIES(MATHEMATICS)

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE