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X-WR-CALNAME:EuroNoise 2015 Numerical determination of equivalent damping parameters for a finite element model to predict the underwater noise due to offshore pile driving
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TZID:Europe/Paris
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CREATED:19700101T000000Z
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SUMMARY:EuroNoise 2015 Numerical determination of equivalent damping parameters for a finite element model to predict the underwater noise due to offshore pile driving
DTSTART;TZID=Europe/Paris:20150601T162000
DTSTAMP:20150601T162000Z
SEQUENCE:1
DESCRIPTION: Kristof Heitmann --- Due to the massive construction of offshore wind parks in the German North \nSea, an increasing attention has been directed to underwater noise. In \nparticular, to protect marine life, limiting values for the sound pressure \nlevel during construction have been introduced by the German authorities. \nState of the art for the erection of the wind turbines is impact pile driving. \nHence, a reliable prediction technique for the noise due to pile driving with \nan impact hammer becomes increasingly important. At present, different \nnumerical methods are under development for these forecasts. The most common \ntechnique used to calculate the sound pressure in the area close the pile is \nthe finite element method. In several publications, an equivalent damping in \nthe embedded part of the pile is chosen to take the losses, e.g. the \nplasticity of the soil, into account. In this contribution, a method to \ndetermine the equivalent damping with the Â“Wave Equation Analysis of Pile \nDrivingÂ” (WEAP) is shown. During a drivability study performed with WEAP, the \nRayleigh damping coefficients are extracted. Finally, these coefficients are \nvalidated by comparing modelling results based on the finite element method \n(FEM) with measured data.\n
LOCATION:0.2 Berlin (90)
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