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    Numerical modeling of radiated sound for impact pile driving in offshore environments

    235907_235907.pdf (1.101Mb)
    Access Status
    Open access
    Authors
    Wilkes, D.
    Gourlay, T.
    Gavrilov, Alexander
    Date
    2016
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Wilkes, D. and Gourlay, T. and Gavrilov, A. 2015. Numerical modeling of radiated sound for impact pile driving in offshore environments. IEEE Journal of Oceanic Engineering. 41 (4): pp. 1072-1078.
    Source Title
    IEEE Journal of Oceanic Engineering
    DOI
    10.1109/JOE.2015.2510860
    ISSN
    1558-1691
    0364-9059
    School
    Centre for Marine Science and Technology
    Remarks

    Copyright © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

    URI
    http://hdl.handle.net/20.500.11937/59658
    Collection
    • Curtin Research Publications
    Abstract

    In this paper, a coupled near-to-far-field numerical model for predicting the acoustic emissions from impact pile driving in offshore environments is presented. The near-field region of the pile is modeled via an axisymmetric finite element method (FEM) model which is solved in the frequency domain. The calculated radiated field at a chosen radial distance in the FEM model is then expanded into a series of local normal modes (NMs) which are propagated into the far field, to predict the piling sound characteristics, such as the peak pressure and sound exposure levels, at large ranges. Numerical examples are presented for the same pile configuration adopted for the COMPILE 2014 benchmark workshop on predicting offshore pile-driving noise, and these results are compared in both the near and far fields to those of several other research groups who presented results at the workshop. Results from the present FEM-NM near-to-far-field model are shown to be generally in good agreement with those results from the other research groups. In the near field, similar signal waveforms are predicted by the various models which employ the same pile wall boundary conditions. In the far field, the selected models showed a variation of ±1 dB at 1.5 km, and ±4 dB at 50 km for the predicted peak pressure levels, and a variation of ±1.5 dB over the 50-km range for the predicted sound exposure levels.

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