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The application of three-dimensional hydroelastic analysis of ship structures in Pekeris hydro-acoustic waveguide environment

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Acta Mechanica Sinica 2014年第1期30卷 59-66页

作者： Ming-Song Zou You-Sheng Wu Yan-Min Liu China Ship Scientific Research Center

The hydroelastic analysis and sonoelastic analysis methods are incorporated with the Green＇s function of the Pekeris ocean hydro-acoustic waveguide model to produce a three-dimensional sonoelastic analysis method for ships in the ocean hydro-acoustic environment. The seabed condition is represented by a penetrable boundary of prescribed density and sound speed. This method is employed in this paper to predict the vibration and acoustic radiation of a 1 500 t Small Water Area Twin Hull （SWATH） ship in shallow sea acoustic environment. The wet resonant frequencies and radiation sound source levels are predicted and compared with the measured results of the ship in trial.

关键词： Hydroelasticity sonoelasticity Acousticwaves Shallow sea Free surface effect Seabed effect -SWATH ship

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A three-dimensional hydroelasticity theory for ship structures in acoustic field of shallow sea

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Journal of Hydrodynamics 2013年第6期25卷 929-937页

作者：邹明松吴有生刘艳敏林长刚 China Ship Scientific Research Center

Nowadays the development of green ship technology requires the vibration and noise control of oceangoing ships. The three-dimensional hydroelasticity theory of ships was previously extended to include the effect of fluid compressibility. This enables the dynamic responses and the acoustic radiations of a ship excited by onboard machineries or fluid fluctuation loads to be predicted. In this paper the hydroelastic analysis and sonoelastic analysis methods are fixrther incorporated with the Green＇s function in the Pekeris ocean hydro-acoustic waveguide model to work out a three-dimensional sonoelastic analysis method for ships in the ocean hydro-acoustic environment. As examples, the sound radiations of a floating elastic spherical shell excited by a concentrated force and a traveling LNG ship excited by the propeller induced pulsating forces acting on the wetted bottom plate of the stem in the shallow sea environment are predicted. The influences of the free surface and the sea bed on the generalized hydrodynamic coefficients and the acoustic pressure distributions in fluid domain are illustrated and discussed.

关键词： hydroelasticity sonoelasticity acoustic waves shallow sea environment LNG ship

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