THE INFLUENCE OF BUOYANCY PARAMETERS ON THE DYNAMIC BEHAVIOR OF ARTICULATED TOWER
Keywords:
Articulated Tower, buoyancy parameter, dynamic behavior, natural frequency, exciting moment energy, extreme pitch response, RAOAbstract
A study to develop a better understanding towards the dynamic behavior of articulated
tower is considered necessary in view of anticipating the growth of its demand in the
South East Aston region. This paper describes such study emphasizing on the effects of
buoyancy parameter variations for both regular and random wave behaviors. Results of
the study shows that +/- 20% changes in the outside diameter could affect the natural
frequency as much as +/- 27.3% and the excuing moment energy by as much as 28.2%
for increasing outside diameter and -22.4% for decreasing outside diameter. It seems to
be significant, but in term of its value the change is fairly small. Variations at the
buoyancy chamber length give the same effect. but it is smaller then varying the outside
diameter. The variation ofposition gives much smaller effect from both study above, the
only notable effect of position variation is on the extreme pitch response at medium range
significant wave height (Hs). From overall study results, it could be concluded that AT is
very feasible to be operate at extreme wave condition because of the natural frequency
and maximum Response Amplitude Operator (RAO) is relatively small. This condition
make the AT much suitable for the South East Asia region.
References
Scbastiani, G., Brandi, R, Lena, F.D. and Nista, A., ( 1984), "Highly Compliant Column for Tanker Mooring and Oil Production in lOOOm Water Depth", Proceedings of the I6th Offshore Technology Conf erence, Houston, Texas
Helvacioglu, I.H. and Incecik, A., (1990), "Dynamics of Double Articulated Tower", Proceedings of the 4'h International Symposium on Integrity of Offshore 'Structures, Glasgow, Scotland
Bar-Avi, P. and Benaroya, H., (1996), "Planar Motion of an Articulated Tower", Journal ofSound and Vibration, 190 (I)
Kuchnicki, S.N. and Bcnaroya, H., (2002), "A Parametric Study of a Flexible Ocean Tower, Chaos, Solitons & Fractals, 14
Kim, C.H. and Luh, P.A., (1982), "Prediction of Pitching Motions and Loads of an Articulated Loading Platform in Waves", Proceedings of the 14th Offshore Technology Conference, Houston, Texas
Jain, R.K. and Kirk, C.L., (1981), "Dynamic Response of a Double Articulated Offshore Loading Structure to Noncollinear Waves and Current", Journal ofEnergy Resources Technology, 103
Chakrabarti, S.K. and Corter, D.C., (1980), "Transverse Motion of Articulated Tower", Journal ofthe Waterway. Port. Coastal and Ocean Division, ASCE, 107
Helvacioglu, I.H. and Incecik, A., (1988), "Dynamic Analysis of Coupled Articulated Tower and Floating Production Systems", Proceedings of the fA International Conference on Offshore Mechanics and Arctic Engineering, ASME, Houston
Hoft, J. P., (1982), Advanced Dynamics of Marine Structures, John Wiley and Sons Inc, New York
Dahong, Q. and Qhihua, Z., (1982), "The Dynamic Response of an Underwater Column Hinged at the Sea Bottom under the Wave Action", Proceedings ofBehavior ofOffshore Structures, MIT, Boston
II. Lloyd, ARJM, (1989), Ship Behavior in Rough Weather, Ellis Horwood Ltd., Chichester, UK
Hallam, M.G., Hear, N.J. and Wooton, L.R., (1978), Dynamics of Marine Structures: Methods of Calculating the Dynamic Response ofFixed Structures Subjected to Wave and Current Action, CIRIA Underwater Engineering Group, London
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