NDLI: Intrinsic mode characteristic analysis and extraction in underwater cylindrical shell acoustic radiation

Content Provider	Springer Nature Link
Author	Liu, QingYu Fang, ShiLiang Cheng, Qiang Cao, Jin An, Liang Luo, XinWei
Copyright Year	2013
Abstract	Target dimension is important information in underwater target classification. An intrinsic mode characteristic extraction method in underwater cylindrical shell acoustic radiation was studied in this paper based on the mechanism of shell vibration to gain the information about its dimension instead of accurate inversion processing. The underwater cylindrical shell vibration and acoustic radiation were first analyzed using mode decomposition to solve the wave equation. The characteristic of acoustic radiation was studied with different cylindrical shell lengths, radii, thickness, excitation points and fine structures. Simulation results show that the intrinsic mode in acoustic radiation spectrum correlates closely with the geometry dimensions of cylindrical shells. Through multifaceted analysis, the strongest intrinsic mode characteristic extracted from underwater shell acoustic radiated signal was most likely relevant to the radiated source radius. Then, partial information about unknown source dimension could be gained from intrinsic mode characteristic in passive sonar applications for underwater target classification. Experimental data processing results verified the effectiveness of the method in this paper.
Starting Page	1339
Ending Page	1345
Page Count	7
File Format	PDF
ISSN	16747348
Journal	Science in China Series G
Volume Number	56
Issue Number	7
e-ISSN	18691927
Language	English
Publisher	SP Science China Press
Publisher Date	2013-05-23
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	cylindrical shell mode decomposition acoustic radiation characteristic Physics Classical Continuum Physics Astronomy, Observations and Techniques
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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