| Analysis of Underwater Acoustic Radiation of SWATH vessel using Transfer Function Method |
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| 전달함수법을 이용한 SWATH선의 수중 음향 방사 해석 |
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김재호 |
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국방과학연구소 제2체계개발본부 |
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| Abstract |
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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. |
| Key Words:
SWATH, Infinite Stiffened Cylindrical Shell, Hull Transfer Function, Underwater Acoustic Radiation |
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