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Modeling of offshore pile driving noise using a semi-analytical variational formulation

Modeling of offshore pile driving noise using a semi-analytical variational formulation
Modeling of offshore pile driving noise using a semi-analytical variational formulation
Underwater noise radiated from offshore pile driving got much attention in recent years due to its threat to the marine environment. This study develops a three-dimensional semi-analytical method, in which the pile is modeled as an elastic thin cylindrical shell, to predict vibration and underwater acoustic radiation caused by hammer impact. The cylindrical shell, subject to the Reissner–Naghdi’s thin shell theory, is decomposed uniformly into shell segments whose motion is governed by a variational equation. The sound pressures in both exterior and interior fluid fields are expanded as analytical functions in frequency domain. The soil is modeled as uncoupled springs and dashpots distributed in three directions. The sound propagation characteristics are investigated based on the dispersion curves. The case study of a model subject to a non-axisymmetric force demonstrates that the radiated sound pressure has dependence on circumferential angle. The case study including an anvil shows that the presence of the anvil tends to lower the frequencies and the amplitudes of the peaks of sound pressure spectrum. A comparison to the measured data shows that the model is capable of predicting the pile driving noise quantitatively. This mechanical model can be used to predict underwater noise of piling and explore potential noise reduction measures to protect marine animals
structural–acoustic modeling, underwater noise, pile driving, cylindrical shell
0003-682X
85-100
Deng, Qingpeng
8c4c8e7f-0797-4928-b4da-5117ed0097d8
Jiang, Weikang
ad42380b-f514-4f88-9ee9-13bfb958b537
Tan, Mingyi
4d02e6ad-7915-491c-99cc-a1c85348267c
Xing, Jingtang
d4fe7ae0-2668-422a-8d89-9e66527835ce
Deng, Qingpeng
8c4c8e7f-0797-4928-b4da-5117ed0097d8
Jiang, Weikang
ad42380b-f514-4f88-9ee9-13bfb958b537
Tan, Mingyi
4d02e6ad-7915-491c-99cc-a1c85348267c
Xing, Jingtang
d4fe7ae0-2668-422a-8d89-9e66527835ce

Deng, Qingpeng, Jiang, Weikang, Tan, Mingyi and Xing, Jingtang (2016) Modeling of offshore pile driving noise using a semi-analytical variational formulation. Applied Acoustics, 104, 85-100. (doi:10.1016/j.apacoust.2015.11.002).

Record type: Article

Abstract

Underwater noise radiated from offshore pile driving got much attention in recent years due to its threat to the marine environment. This study develops a three-dimensional semi-analytical method, in which the pile is modeled as an elastic thin cylindrical shell, to predict vibration and underwater acoustic radiation caused by hammer impact. The cylindrical shell, subject to the Reissner–Naghdi’s thin shell theory, is decomposed uniformly into shell segments whose motion is governed by a variational equation. The sound pressures in both exterior and interior fluid fields are expanded as analytical functions in frequency domain. The soil is modeled as uncoupled springs and dashpots distributed in three directions. The sound propagation characteristics are investigated based on the dispersion curves. The case study of a model subject to a non-axisymmetric force demonstrates that the radiated sound pressure has dependence on circumferential angle. The case study including an anvil shows that the presence of the anvil tends to lower the frequencies and the amplitudes of the peaks of sound pressure spectrum. A comparison to the measured data shows that the model is capable of predicting the pile driving noise quantitatively. This mechanical model can be used to predict underwater noise of piling and explore potential noise reduction measures to protect marine animals

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Modelling_of_offshore_pile_driving_noise.pdf - Accepted Manuscript
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Applied Acoustcis 2015_Modeling of offshore pile driving noise using a semi-analytical variational formulation.pdf - Other
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More information

Submitted date: 25 March 2015
Accepted/In Press date: 5 September 2015
Published date: 2016
Keywords: structural–acoustic modeling, underwater noise, pile driving, cylindrical shell
Organisations: Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 384314
URI: http://eprints.soton.ac.uk/id/eprint/384314
ISSN: 0003-682X
PURE UUID: 51f208ab-29ac-479e-9b2c-c12e3ad3d0d9

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Date deposited: 21 Dec 2015 10:08
Last modified: 22 Jul 2022 19:39

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Contributors

Author: Qingpeng Deng
Author: Weikang Jiang
Author: Mingyi Tan
Author: Jingtang Xing

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