036 - Underwater surface ship signature
Gloza I.
Abstract
In the paper the results of intensive investigations of the underwater–radiated noise by different kinds of surface ships have been presented. To identify the sources of underwater noise sources the level of vibrations was also measured in the same time by means of the set of accelerometers inside each ship section. Radiation at discrete frequencies caused by low frequency hull vibrations, exited by the machinery is relatively easily detected and must be reduced as much as possible. The radiated underwater noise spectra show high-level tonal frequencies originated from propellers and also main engines. They varied with speed of the vessel in a complex manner. Ship’s service diesel generator creates series of harmonics which amplitudes and frequencies are independent of ship speed. The paper documents series characteristics of the surface ships radiated underwater noise data which are discussed in details.
Citation
Gloza I.: Underwater surface ship signature, CD-ROM Proceedings of the Thirtheenth International Congress on Sound and Vibration (ICSV13), July 2-6, 2006, Vienna, Austria, Eds.: Eberhardsteiner, J.; Mang, H.A.; Waubke, H., Publisher: Vienna University of Technology, Austria, ISBN: 3-9501554-5-7
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