Seismo-acoustic effects in the presence of sedimentary basins: impact on noise generated by pile driving and pseudo-3D modeling of the interaction of two distant pile driving operations - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2023

Seismo-acoustic effects in the presence of sedimentary basins: impact on noise generated by pile driving and pseudo-3D modeling of the interaction of two distant pile driving operations

Résumé

Pile driving is a major source of noise generated by human activities in the ocean. The complex wave field generated by this activity depends not only on the characteristics of the water column but also on the structure of the underlying sedimentary layers from a rheological and geometric point of view. The sedimentary structure is generally considered as a horizontally stratified medium with a gradient of mechanical properties. In this presentation, we propose to study a sedimentary configuration with a heterogeneous structure in the range that includes two sedimentary basins. For this purpose, we performed several numerical simulations using a 2D time-domain spectral element method that allows us to accurately deal with the characteristics of the complex marine environment (complex bathymetry and elastic sediments). We highlight the presence of interface waves of the Stoneley-Scholte type. Furthermore, we propose a method to generate pseudo-3D SEL maps of the interaction of two distant pile-driving operations using a single 2D simulation. Our results show the importance of taking into account the phase of the signals to properly evaluate the interference between the two operations.
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Dates et versions

hal-04174413 , version 1 (31-07-2023)

Identifiants

  • HAL Id : hal-04174413 , version 1

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Paul Cristini, Louise Pacaut, Nathalie Favretto-Cristini. Seismo-acoustic effects in the presence of sedimentary basins: impact on noise generated by pile driving and pseudo-3D modeling of the interaction of two distant pile driving operations. UACE2023, Jun 2023, Kalamata, Greece. ⟨hal-04174413⟩
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