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Numerical modelling of multi-body hydrodynamics in multi-phase simulations
Citation Link: https://doi.org/10.15480/882.3081
Publikationstyp
Doctoral Thesis
Date Issued
2020-11
Sprache
English
Author(s)
Advisor
Referee
Title Granting Institution
Technische Universität Hamburg
Place of Title Granting Institution
Hamburg
Examination Date
2020-07-10
Institut
TORE-DOI
TORE-URI
First published in
Number in series
721
Citation
Schriftenreihe Schiffbau (721): (2020)
Publisher
Technische Universität Hamburg
This thesis is concerned with the simulation of mechanically coupled bodies in a multi-phase environment. While the applications of such cases are very wide, they are of particular interest for offshore wind parks, where numerical investigations can support the safety margins of an operation. The computational focus of the present study is to supplement a viscous three-phase fluid-soil solver featuring the overset grids technique by appropriate mechanical models to analyse the hydrodynamics of complex systems composed of multiple mechanically coupled bodies. A quaternion-based motion modeller featuring several basic joint elements is used to model their influence in a multi-body arrangement or the mechanical interaction between different moving parts of a structure, which can be seen as a multi-body system. Implicit seaway boundary conditions allow the use of compact domain sizes and variable headings of incident waves. Validation examples included refer to rigid links, ropes, fenders or guide frames restricting the motion in experiments, which aim to illustrate the predictive capabilities of the procedure. Finally, investigations on the simulation of a floating tug in waves, boatlanding for safe transfer, grounding of gravity foundations for wind turbines and the installation process of jack-up rigs in seaway involving structure-seabed interactions has been considered for application purposes while utilizing all features of the computational framework.
Subjects
coupled bodies
mechanical joints
multi-body hydrodynamics
seaway
offshore application
DDC Class
600: Technik
Publication version
publishedVersion
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