Građevinar, Vol. 74 No. 10., 2022.
Professional paper
https://doi.org/10.14256/JCE.3276.2021
Numerical modelling of floating structure with coupled Eulerian–Lagrangian technique
Engin Gücüyen
R. Tuğrul Erdem
Abstract
Floating structures are complex systems composed of superstructure, floating-mooring components, and anchors. In this study, the behaviours of a pontoon, which is used as a floating structure, and four mooring elements under different wave loading conditions were investigated. A numerical analysis of the coupled motions of the pontoon, mooring lines, and marine environment was performed. While the mooring lines were modelled as wire elements, the pontoon was modelled as a rigid body with six degrees of freedom. Wave loading conditions were represented using two different wave spectra. The first spectrum (Case I) was generated based on a single sinusoidal wave utilising the JONSWAP spectrum, whereas the second one (Case II) was generated based a superimposed multi-sinusoidal wave. Time-varying motions of the pontoon and tensions of the mooring lines were determined based on the numerical analyses for Cases I and II. Critical values were determined using the results of both cases. The numerical solutions were based on bidirectional fluid–structure interaction (FSI) analysis. A fully non-linear free surface simulation was performed using the coupled Eulerian–Lagrangian (CEL) technique. Furthermore, numerical results were compared with the results obtained from analytical solutions of free surface elevations.
Keywords
floating structure; fluid–structure interaction; finite elements analysis; coupled Eulerian–Lagrangian technique
Hrčak ID:
286211
URI
Publication date:
20.11.2022.
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