000			01561nam a22001577a 4500
003			OSt
005			20160720121154.0
008			160720b xxu||||| |||| 00| 0 eng d
040			_cNational Acoustic Laboratories
100			_aKinns, Roger
245			_aSIMPLIFIED PREDICTION OF SOUND RADIATION DUE TO BENDING MODE RESONANCES OF SUBMERGED CYLINDERS
520	3		_aThe aim of this work is to explore the nature of radiation from bending modes of a submerged tube with variation in mass distribution along the length of the tube. The bending modes of a fluid-loaded tube are initially predicted using a simple finite element shell model, where the effects of water loading are modelled by adding mass to that of the tube itself. The sound radiation is then predicted using an array of transverse dipoles whose strengths are proportional to the local cross-sectional area and vibration amplitude. The effects of retarded time are taken into account for directions that are not normal to the tube. For comparison with the semi-analytical approach, a fully coupled finite element/boundary element model of the fluid-loaded tube was also developed. Results from both techniques show that variation of the mass distribution of the fluid-loaded tube has a large impact on the radiated sound power and directivity of the radiated sound pressure due to low order bending modes.
773	0		_tAcoustics 2015 Hunter Valley 15-18 November 2015
856			_uhttp://dspace.nal.gov.au/xmlui/bitstream/handle/123456789/414/p78.pdf?sequence=1&isAllowed=y
942			_2udc _cARTICLE
999			_c2602 _d2602