Investigations on scour development at tripod foundations for offshore wind turbines: Modeling and application

Research output: Contribution to conference › Paper › Research › peer review

Authors

  • A. Stahlmann
  • T. Schlurmann

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Original languageGerman
Publication statusPublished - 2012

Abstract

Regarding offshore constructions, there is still a lack in knowledge of scour progression for complex structures like foundations for offshore wind energy converters at present, which is however necessary for its dimensioning. As an example of such complex structure types, Tripod foundations are constructed in German offshore wind farms at present. In order to describe physical processes and influencing factors on scour progression from a scientific point of view, comprehensive investigations on the scouring phenomena for Tripod foundations have been carried out and will be partly presented here. The overall investigation method consists of a combination of 1:40 small and 1:12 large scale physical model tests in wave flumes, numerical simulations using CFD methods and in-situ measured scour data. For the numerical modeling part, a sediment transport model formulation has been implemented into OpenFOAM software code. The results show a general variability of scour depending on the load boundary conditions and structural parameters. Scours occur both at the foundation piles and directly under the structure, which in this form could not be predicted using standard approaches, but which has to be taken into account when regarding the soil mechanical stability and the final dimensioning of the foundations.

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Investigations on scour development at tripod foundations for offshore wind turbines: Modeling and application. / Stahlmann, A.; Schlurmann, T.
2012.

Research output: Contribution to conference › Paper › Research › peer review

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abstract = "Regarding offshore constructions, there is still a lack in knowledge of scour progression for complex structures like foundations for offshore wind energy converters at present, which is however necessary for its dimensioning. As an example of such complex structure types, Tripod foundations are constructed in German offshore wind farms at present. In order to describe physical processes and influencing factors on scour progression from a scientific point of view, comprehensive investigations on the scouring phenomena for Tripod foundations have been carried out and will be partly presented here. The overall investigation method consists of a combination of 1:40 small and 1:12 large scale physical model tests in wave flumes, numerical simulations using CFD methods and in-situ measured scour data. For the numerical modeling part, a sediment transport model formulation has been implemented into OpenFOAM software code. The results show a general variability of scour depending on the load boundary conditions and structural parameters. Scours occur both at the foundation piles and directly under the structure, which in this form could not be predicted using standard approaches, but which has to be taken into account when regarding the soil mechanical stability and the final dimensioning of the foundations.",
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Download

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AU - Stahlmann, A.

AU - Schlurmann, T.

N1 - Cited By :11 Export Date: 1 February 2021

PY - 2012

Y1 - 2012

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AB - Regarding offshore constructions, there is still a lack in knowledge of scour progression for complex structures like foundations for offshore wind energy converters at present, which is however necessary for its dimensioning. As an example of such complex structure types, Tripod foundations are constructed in German offshore wind farms at present. In order to describe physical processes and influencing factors on scour progression from a scientific point of view, comprehensive investigations on the scouring phenomena for Tripod foundations have been carried out and will be partly presented here. The overall investigation method consists of a combination of 1:40 small and 1:12 large scale physical model tests in wave flumes, numerical simulations using CFD methods and in-situ measured scour data. For the numerical modeling part, a sediment transport model formulation has been implemented into OpenFOAM software code. The results show a general variability of scour depending on the load boundary conditions and structural parameters. Scours occur both at the foundation piles and directly under the structure, which in this form could not be predicted using standard approaches, but which has to be taken into account when regarding the soil mechanical stability and the final dimensioning of the foundations.

KW - CFD

KW - Numerical Modeling

KW - Offshore Wind

KW - Physical Modeling

KW - Scour

KW - Tripod

KW - Anchorages (foundations)

KW - Coastal engineering

KW - Computational fluid dynamics

KW - Mechanical stability

KW - Numerical methods

KW - Numerical models

KW - Offshore oil well production

KW - Offshore wind turbines

KW - Sediment transport

KW - Soil testing

KW - Investigation methods

KW - Large-scale physical model tests

KW - Offshore constructions

KW - Offshore wind energy converters

KW - Offshore winds

KW - Physical model

KW - Sediment transport model

KW - Offshore wind farms

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DO - 10.9753/icce.v33.sediment.90

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