Numerical modelling of fluid-structure interactions for floating wind turbine foundations

Axelle Viré, Jiansheng Xiang, Matthew Piggott, Johannes Spinneken, Christopher Pain

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

4 Citations (Scopus)

Abstract

The aim of this study is to model the interactions between fluids and solids using fully nonlinear models. Non-linearity is important in the context of floating wind turbines, for example, to model breaking waves impacting on the structure and the effect of the solids elasticity. In this work, the fluid- and solid-dynamics equations are solved using separate finite-element models, which are coupled at every time step. This enables the mutual interactions between fluids and moving solids to be modelled. Importantly, the coupling algorithm ensures that the action-reaction principle is satisfied at a discrete level, independently of the order of representation of the discrete fields in each model. To the authors knowledge, the present algorithm is novel in that it can simultaneously handle (i) non-matching fluid and solid meshes, (ii) different polynomial orders of the basis functions on each mesh, and (iii) different fluid and solid time steps. Results are shown for: (i) a bottom-mounted pile subjected to small-amplitude waves in a numerical wave tank, and (ii) a truncated pile floating at an interface between air and water.

Original languageEnglish
Title of host publicationProceedings of the 23rd International Offshore and Polar Engineering Conference, ISOPE 2013
Pages377-382
Number of pages6
Publication statusPublished - 2013
Externally publishedYes
Event23rd International Offshore and Polar Engineering Conference, ISOPE 2013 - Anchorage, AK, United States
Duration: 30 Jun 20135 Jul 2013

Conference

Conference23rd International Offshore and Polar Engineering Conference, ISOPE 2013
CountryUnited States
CityAnchorage, AK
Period30/06/135/07/13

Keywords

  • Cylindrical pile
  • Finite-element methods
  • Floating wind turbines
  • Fluid-structure interactions
  • Numerical wave tank
  • Unstructured meshes

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