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Validation of a 3D pile driving noise model with noise mitigation measures
Publikationstyp
Conference Paper
Date Issued
2021
Sprache
English
Author(s)
Institut
Volume
44
Issue
1
Start Page
070014
Citation
Proceedings of Meetings on Acoustics 44 (1) : 2021)
Publisher DOI
Scopus ID
Piles are the state-of-the-art foundation for offshore wind structures. The piling process leads to high sound pressure levels in the water reaching levels that are potentially harmful to the marine life. Numerical models are used to predict the sound pressure levels and to optimize the sound mitigation set-up prior to construction. Such models are often based on a hybrid modelling approach with a close-range and a far- range model. Thereby, the close-range model is used to derive the starting field for the far-range model. Often, the close-range model is based on the finite element method (FEM). Far-range models usually use underwater acoustics propagation models such as the parabolic equation (PE) modelling approach. Within this contribution, a hybrid three-dimensional (3D) pile driving noise model is validated with measurement data from offshore sites with a dedicated bathymetry. The model is based on a FE modelling approach for the close-range and a 3D PE model for the far-range. The measurements were conducted with two different noise mitigation measures. The method of including these measures into the PE model as well as the influence of bathymetry-induced 3D effects on the sound pressure levels are presented.