Impulse based substructuring for coupling offshore structures and wind turbines in aero-elastic simulations

P. L.C. van der Valk, D. J. Rixen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

11 Scopus citations

Abstract

In order to achieve the goal of 20% renewable energy in 2020, as set by the European Union, large offshore wind farms are either under construction or in development through- out Europe. As many of the "easy" locations are already under development, offshore wind farms are moving further offshore into deeper waters, which results in a set of new technical challenges. One of these challenges comes from the fact that the traditional solution of placing monopile-foundations is possibly no longer suffcient to anchor the latest generation of wind turbines to the seabed. This requires that different and more complex types of offshore structures, such as jackets, are used as foundations. Appropriate models for these more complex foundations, are often not available in aero-elastic simulation software. The currffshore structure, could lead to errors in the coupled simulations due to dynamics that are not modeled. In this paper an alternative method, Impulse Based Substructuring, is proposed to efficiently and accurately include the dynamic behavior of the support structure in the load simulations. The method is demonstrated using the NREL 5MW reference turbine and UpWind reference jacket. It is shown that the method is able to accurately compute the coupled dynamics and requires only a number of small augmentations to the standard Newmark time integration scheme for nonlinear finite element models.

Original languageEnglish
Title of host publication53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 2012
StatePublished - 2012
Externally publishedYes
Event53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 2012 - Honolulu, HI, United States
Duration: 23 Apr 201226 Apr 2012

Publication series

Name53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 2012

Conference

Conference53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 2012
Country/TerritoryUnited States
CityHonolulu, HI
Period23/04/1226/04/12

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