2023_programme: Frequency Dependent Scaling Laws for Offshore Pile Driving Noise
- Session: 23. Ambient Noise Sources
Organiser(s): -
- Lecture: Frequency Dependent Scaling Laws for Offshore Pile Driving Noise
Paper ID: 2050
Author(s): von Pein Jonas, Lippert Tristan, Lippert Stephan, von Estorff Otto
Presenter: von Pein Jonas
Abstract: The state-of-the-art foundations for offshore wind turbines are based on piles. These can be monopiles with relatively large diameters or anchoring piles of the foundation structure with smaller diameters. Both types of piles are usually driven into the seabed to their final penetration depth using percussive pile driving. This process induces high sound pressure levels in the water reaching magnitudes that are potentially dangerous to the marine fauna. In order to protect the marine environment, in many countries limit values for the emitted sound pressure levels must be respected. Consequently, noise mitigation systems are usually necessary to comply with these limits. Numerical modelling is often required to verify and optimize the noise mitigation concept prior to wind farm construction. Despite their high accuracy, these models have the disadvantage that they are only accessible to a few experts and require many input parameters that are often not available at an early planning stage. Simplified scaling laws for estimating the expected sound levels represent an easy to apply alternative and have recently been published for the broadband SEL. However, the influence of the considered parameters on the one-third octave band spectrum is also of great interest. The present contribution shows ways of scaling the influence of the pile diameter, water depth, and pile head excitation on the one-third octave band spectrum of the SEL.
- Corresponding author: Mr Jonas von Pein
Affiliation: Hamburg University of Technology
Country: Germany
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