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  4. Leg-seabed interactions of jack-up vessels due to motions in irregular waves
 
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Leg-seabed interactions of jack-up vessels due to motions in irregular waves

Publikationstyp
Conference Paper
Date Issued
2014-06
Sprache
English
Author(s)
Kreuzer, Edwin  
Solowjow, Eugen  
Qiu, Gang  
Hamann, Thorben  
Grabe, Jürgen  
Institut
Geotechnik und Baubetrieb B-5  
Mechanik und Meerestechnik M-13  
TORE-URI
http://hdl.handle.net/11420/10960
Volume
1B
Citation
International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2014)
Contribution to Conference
ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2014  
Publisher DOI
10.1115/OMAE2014-24303
Scopus ID
2-s2.0-84911434489
This paper analyzes the leg-seabed interaction due to motions of a 3rd generation jack-up vessel in irregular waves. The proposed model considers hydrodynamic forces on the hull as well as on the legs. The sea floor reaction forces are analyzed with a Coupled Eulerian-Lagrangian (CEL) method. The results are used to develop a mechanical rheological model for the sea floor. With computational efficiency in mind a state-space representation in time domain is derived. The excitation of the system is caused by irregular waves, which are described by the JONSWAP spectrum. The proposed method allows the efficient computation of short term (2-15 min) scenarios and events through sampling of realizations. It is used to compute the impact forces on the legs from the seabed induced by irregular vessel motions. The presented framework is suitable for the planning of jack-up operations in the offshore wind industry. It can also be applied for the design of dynamic positioning and jacking systems.
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