A passive isolation approach to reduce the sound pressure radiated by a submarine is presented. The submerged vessel is modeled as a stiffened cylindrical hull partitioned by bulkheads and with two end caps of conical shape. Fluctuating forces from the propeller are transmitted to the hull through the shaft and a rigid foundation, resulting in axisymmetric excitation of the hull. The hull surface motion is mainly in the axial direction with a small radial component due to the coupling between the two orthogonal shell displacements. The sound pressure resulting from the axial motion is radiated from the end caps of the submarine. This work investigates reduction of the far field sound pressure by passive isolation of the end caps from the main hull. Isolation of the axial motion of the end caps from the cylindrical hull results in significant reduction of the radiated sound at low frequencies. The fluid loading approximation for a finite cylindrical shell in the low frequency range is also discussed.
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e-mail: maurorestaca@yahoo.it
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June 2011
Research Papers
Reduction of the Sound Pressure Radiated by a Submarine by Isolation of the End Caps
Mauro Caresta,
Mauro Caresta
School of Mechanical and Manufacturing Engineering,
e-mail: maurorestaca@yahoo.it
University of New South Wales
, Sydney, NSW 2052, Australia
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Nicole J. Kessissoglou
Nicole J. Kessissoglou
School of Mechanical and Manufacturing Engineering,
University of New South Wales
, Sydney, NSW 2052, Australia
Search for other works by this author on:
Mauro Caresta
School of Mechanical and Manufacturing Engineering,
University of New South Wales
, Sydney, NSW 2052, Australiae-mail: maurorestaca@yahoo.it
Nicole J. Kessissoglou
School of Mechanical and Manufacturing Engineering,
University of New South Wales
, Sydney, NSW 2052, AustraliaJ. Vib. Acoust. Jun 2011, 133(3): 031008 (7 pages)
Published Online: March 29, 2011
Article history
Received:
November 6, 2009
Revised:
August 4, 2010
Online:
March 29, 2011
Published:
March 29, 2011
Citation
Caresta, M., and Kessissoglou, N. J. (March 29, 2011). "Reduction of the Sound Pressure Radiated by a Submarine by Isolation of the End Caps." ASME. J. Vib. Acoust. June 2011; 133(3): 031008. https://doi.org/10.1115/1.4003198
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