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Analysis of Underwater Acoustic Radiation of SWATH vessel using Transfer Function Method  

김재호 (국방과학연구소 제2체계개발본부)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.6, no.2, 2003 , pp. 20-34 More about this Journal
Abstract
The good sea-keeping capability of the SWATH(Small Waterplane Area Twin Hull) ship has been attractive for research or surveillance vessels. Especially, for the naval ships accomplishing the underwater acoustic missions, it is necessary to access and minimize the underwater radiated noise level generated by the ships. Therefore, acoustic signature management and control are very important topics for these vessels. Underwater radiation pattern in the low frequency range is dominated by the tonals from the vibration of onboard machinery. In this work, the radiated noise level generated by the propulsion machine in the submerged hull is predicted using the transfer function technique and the hull transfer function for the submerged hull is determined by analyzing the longitudinal/circumferential stiffened infinitely long cylindrical shell and considering the empirical database of the previous vessels. It is confirmed that the transfer function technique can give useful information for identifying the noise source and estimating its contribution to the total radiatied noise level.
Keywords
SWATH; Infinite Stiffened Cylindrical Shell; Hull Transfer Function; Underwater Acoustic Radiation;
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  • Reference
1 Court B. Burroughs, 1983, 'Acoustic radiation from fluid-loaded infinite cylindrical shell with doubly periodic ring supports', J. Acoust. Soc. Am. 75. 715-721(1984)
2 Court B. Burroughs and J. Eric Hallander, 1983, 'Acoustic radiation from fluid-loaded, ribbed cylindrical shells excitede by different types of concentrated mechanical drives', J. Acoust. Soc. Am. 91. 2721-2739(1992)
3 Migual C. Junger and David Feit, 'Sound, Structures, and Their Interaction', Chap. 7, ASA, 1993
4 S.-H. Choi, J. D. Achenbach and T. Igus, 'The effect of periodically attached substructures on the excitation of submerged cylindrical shells', J. Sound Vib. 177(3). 379-392(1994)
5 BAE SYSTEM 'LPX Stealth Design, Underwater Radiated Noise Design Criteria', YDl484/URN/TRAl/v1, 2000
6 BAE SYSTEM 'KDX-II Stealth Design, Radiated Noise Signature Design Guidelines', YD1184/URN/N3/v1, 1997
7 W. Soedel, 'Vibration of Shells and Plates', Chap. 4, Macel Dekker, Inc., 1981