Peer Reviewed Publication
Journal of the European Acoustical Association
Lippert, T., and von Estorff, O.
Due to the massive, worldwide increase in the number of constructed offshore wind farms, the ecological impact of construction sites has become an important issue. Hereby, the topic of sound radiation from the needed pile driving procedures for the pile foundations of the turbines has gained a lot of attention lately. Therefore, several numerical models are currently developed to accurately predict sound pressure levels (SPLs) in several kilometers distance to the pile. The topic of parameter uncertainties, being important for every numerical model, is of special significance for these predictions. The extremely large dimensions of the domain of interest and the difficulties in determining, for example the bottom parameters, inevitably lead to a significant degree of uncertainty for the input parameters of the model. In this contribution, a coupled finite element/wavenumber integration model is presented and validated by measurements. Subsequently, the validated model is used to exemplify the effect of parameter uncertainties on the resulting SPLs in the water column, using Monte Carlo simulations. Hereby, the sensitivity of the model to different input parameters is given, as well as a quantification of the resulting prediction accuracy.
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