Effect of sound pressure sampling duration on the assessment of ship&rsquo;s sound source level in the Pekeris hydroacoustic waveguide environment

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (6) : 207-211.

Effect of sound pressure sampling duration on the assessment of ship’s sound source level in the Pekeris hydroacoustic waveguide environment

ZOU Mingsong1,2,3 LIU Shuxiao1,2

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Abstract

A fullscale numerical model was established to evaluate the acoustic radiation of a singleshell underwater ship, considering typical mechanical exciting loads on the ship. The sonoelastic method in Pekeris hydroacoustic waveguide was adopted to simulate the noisetesting state of a ship with forward speed in finite depth water. The radiated noise induced by inner excitation sources was measured at an observation point on one side of the ship. The effect of the sound pressure signal sampling duration on the assessment of the sound source level was investigated. On this basis, some suggestions on the selection of signal sampling duration were given to obtain the frequency spectral characteristics of the ship’s radiation more comprehensively and to make the observed results more stable.

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Ship / Sono-elasticity / Pekeris hydro-acoustic waveguide / Sound pressure signal / Sampling duration

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ZOU Mingsong1,2,3 LIU Shuxiao1,2. Effect of sound pressure sampling duration on the assessment of ship’s sound source level in the Pekeris hydroacoustic waveguide environment[J]. Journal of Vibration and Shock, 2018, 37(6): 207-211

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