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.
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