A three-dimensional sono-elastic method of ships in finite depth water with experimental validation

Zou, Ming-Song; Wu, Yusen; Liu, Shu-Xiao

doi:10.1016/j.oceaneng.2018.06.052

Cited by 49 publications

(11 citation statements)

References 17 publications

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“…Fluid-structure interaction of flexible structures is a common phenomenon in both engineering and natural environments [1,2]. In general, the surface vessels and submarines belong to flexible structure.…”

Section: Introductionmentioning

confidence: 99%

“…e underwater acoustic radiation of the submarine occurs in the complex environment with an interaction of the structural vibration and water medium. Zou et al [1] pointed out that the interaction belongs to a strong coupling problem, which could not be neglected. us, for underwater acoustic radiation problems, the acoustic-structure coupling effect has to be considered.…”

Section: Introductionmentioning

confidence: 99%

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Structure‐Acoustic Coupling Analysis of Vibration and Underwater Acoustic Radiation of a Ring‐Stiffened Conical Shell

Gong¹,

Chen

Gui

et al. 2021

Shock and Vibration

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The underwater acoustic radiation of the submarine power cabin has recently become a hot topic in the industry and also in the academia. In this article, the vibration and underwater acoustic radiation of a ring-stiffened conical shell with bases are investigated numerically by means of the combination of the finite element method and boundary element method. The acoustic radiation field is obtained by the traditional acoustic field model and ISO acoustic field model, respectively. A series of numerical examples are given, and the results are compared. Besides, the sound pressure at different positions with frequency is further studied. It is shown that the sound radiated by the structure mainly propagates to the side directions of the shell and propagates relatively less to the front side and the rear side.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structure‐Acoustic Coupling Analysis of Vibration and Underwater Acoustic Radiation of a Ring‐Stiffened Conical Shell

Gong¹,

Chen

Gui

et al. 2021

Shock and Vibration

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show abstract

“…However, shipping noise is usually considered as noise source from the vessel itself [49], ignoring the wave breaking noise generated from the vessel hull (bow, stern, and body). Studies on the propeller-shaft-hull acoustic radiation and the three-dimensional sono-elasticity method about the acoustic radiation of a ship have been active in the last decades [51,52]. To date, there are few civilian analyses of the directivity of shipping noise contributing to the seafloor noise.…”

Section: Introductionmentioning

confidence: 99%

Seafloor noise ensemble from vessel manoeuvre in the central North Sea

White

Roche

2020

Ocean Engineering

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Anthropogenic noise, e.g., shipping noise, are usually unavoidable and radiate over a certain area, e.g., 10 km depending on the noise source level and acoustic propagation channel, which might affect seabed acoustic engineering as well as species' communication, behaviour, fitness and consequently their survival. Therefore, better understanding of these noise sources allows better prediction of performance of seafloor acoustic research, engineering, and biological environment. Measurements from a hydrophone system mounted on the seafloor in the central North Sea permit comparisons between temporal and spectral seafloor noise as a vessel transits nearby. The measured data indicates that the peak energy in the power spectral density (PSD) of seafloor noise is dominated by that of multiple vessel tonal noise. The tidal level has a strong negative correlation with the seafloor noise variance, and the vessel to hydrophone angle has a modest negative correlation with both the noise variance and kurtosis, particularly within a certain distance (6.6 km at depth 150 m here). As the vessel approaches, the seafloor noise is sensitive to the noise radiated from the vessel manoeuvre dominated at frequencies 400-900 Hz. Further, as the vessel speed increases from 2 knots to 15 knots, the vessel tonal increases the PSD by 10-20 dB at multiple narrow frequency bands (770 and 850 Hz). Results reported here advance the knowledge of seafloor acoustic sensitivity to nearby transit vessels.

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“…Zhang and Cao 24,25 used the FEM to investigate the longitudinal and transverse vibrations of a shaft-hull structure excited by harmonic propeller forces. Zou et al 26,27 developed a three-dimensional sono-elastic method introducing the frequency domain Green's functions to analyze the FSIs, acoustic radiation and acoustic propagation of a ship. The method was validated by calculating the acoustic radiation of a floating elastic spherical shell and an experiment of the underwater acoustic radiation of two ring-stiffened cylindrical shell models.…”

Section: Introductionmentioning

confidence: 99%

Coupled vibration characteristics of a submarine propeller-shaft-hull system at low frequency

Chen

2019

Journal of Low Frequency Noise, Vibration and Active Control

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The coupled longitudinal and transverse vibration characteristics of a submarine propeller-shaft-hull system at low frequency are studied in this paper. Two substructures, which are the propeller-shaft subsystem and the submarine hull, are first modelled using the finite element method. The two substructures are then connected through bearings, which are simplified as longitudinal and lateral springs and dampers. The modes, the natural frequencies and the coupled vibration characteristics of the two substructures and their synthesized system are simulated. An experiment studying the dynamic characteristics of a large-scale submarine test-rig is proceeded and compared with the numerical results, showing great consistency. Finally, transfer path analysis of the low frequency excitation forces using power flow method is discussed.

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A three-dimensional sono-elastic method of ships in finite depth water with experimental validation

Cited by 49 publications

References 17 publications

Structure‐Acoustic Coupling Analysis of Vibration and Underwater Acoustic Radiation of a Ring‐Stiffened Conical Shell

Structure‐Acoustic Coupling Analysis of Vibration and Underwater Acoustic Radiation of a Ring‐Stiffened Conical Shell

Seafloor noise ensemble from vessel manoeuvre in the central North Sea

Coupled vibration characteristics of a submarine propeller-shaft-hull system at low frequency

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