Accession Number : ADA262348


Title :   Sound Radiation from Infinite Laminated Composite Shell with Periodic Rib Stiffening


Descriptive Note : Technical memo


Corporate Author : DEFENCE RESEARCH AGENCY GOSPORT (UNITED KINGDOM)


Personal Author(s) : James, J H


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a262348.pdf


Report Date : Oct 1992


Pagination or Media Count : 35


Abstract : A theory of sound radiation from an infinite cylindrical shell which is stiffened periodically by ribs is given. Both shell and ribs are laminated composites. The shell is modelled by the differential equations of a thin shell theory. The flexible ribs, which exert both forces and moments on the shell's surface, are modelled by thin conical shell finite elements; degrees of freedom other than those at the shell's surface are removed by receptance methods. Excitations are time-harmonic mechanical forces at arbitrary points on the shell's surface and ribs, and acoustic monopoles in the exterior and interior fluids.... Sound radiation, Composite shell, Fiber reinforced material, Rib stiffening, Theoretical model.


Descriptors :   *UNDERWATER SOUND , *RADIATED NOISE , *RING STIFFENED CYLINDERS , RADIATION , MODELS , MATERIALS , EXCITATION , THEORY , FIBER REINFORCED COMPOSITES , HARMONICS , MOMENTS , TIME , DEGREES OF FREEDOM , DIFFERENTIAL EQUATIONS , ACOUSTICS , RIBS


Subject Categories : Submarine Engineering
      Acoustics


Distribution Statement : APPROVED FOR PUBLIC RELEASE