Wave Exciting Forces of a Free Floating Semi Submersible in Regular Waves
DOI:
https://doi.org/10.11113/jt.v74.4641Keywords:
Semi submersible, floating structures, 3D source density distribution techniqueAbstract
Drilling and production of oil by semi submersible take place in many locations throughout the world. Generally, floating structures play an important role in exploring the oil and gas from the sea. The force and motion prediction of offshore structures may be carried out using time domain or frequency domain models or model tests. In this paper the frequency domain analysis used because it is the simplified and linearized form of the equations of motion. The time domain analysis, unlike frequency domain models, is adequate to deal with non-linearities such as viscous damping and mooring forces, but it requires sophisticated solution techniques and it is expensive to employ. In this paper, the wave exciting forces of a free floating semi-submersible were carried out using 3D source distribution method within the scope of the linear wave theory. The results obtained from computations were also compared with the results obtained using commercial software MOSES and WAMIT. Â
References
J. L. Hess, A. M. O. Smith. 1964. Calculation of Nonlifting Potential Flow About Arbitrary 3D Bodies. Journal of Ship Research.
G. Oortmerssen. 1979. Hydrodynamic Interaction between Two Structures Floating in Waves. Proceeding Boss’79, Second International Conference of Behavior of Offshore Structures, London.
O. Yilmaz, A. Incecik. 1996. Extreme Motion Response Analysis of Moored Semi Submersibles. Journal of Ocean Engineering. 23(6).
S, Wu, J. J. Murray, G. S. Virk. 1997. The Motion and Internal Forces of a Moored Semi Submersible in Regular Waves. Journal of Ocean Engineering. 24(7).
M. Soylemez. 1998. Motion Response Simulation of Twin-Hulled Semi Submersible. Journal of Ocean Engineering. 25(4–5).
WAMIT-MOSES Hydrodynamic Analysis Comparison Study. [Online]. From: www.ultramarine.com/hdesk/document/wamit_moses.pdf. [Accessed on 24 Jan 2015].
J. V. Wehausen, Laitone. 1969. Surface Waves. Handbuch der physik, 9. Berlin: Springer-Verlag.
G. F. Clauss, C. Schmittner, K. Stutz. 2002. June 23-28, 2002. Time-Domain Investigation of a Semi Submersible in Rogue Waves. Paper presented at the 21st International Conference on Offshore Mechanics and Arctic Engineering (OMAE2002), Oslo, Norway.
J. N. Newman. 2004. Progress In Wave Load Computations on Offshore Structures. Paper presented at the OMAE 2004, Vancouver.
Downloads
Published
Issue
Section
License
Copyright of articles that appear in Jurnal Teknologi belongs exclusively to Penerbit Universiti Teknologi Malaysia (Penerbit UTM Press). This copyright covers the rights to reproduce the article, including reprints, electronic reproductions, or any other reproductions of similar nature.
