TY - JOUR
T1 - Equivalent linear roll damping of a FPSO coupled with liquid sloshing in a pair of two-row tanks
AU - Igbadumhe, Jane Frances
AU - Sallam, Omar
AU - Bonoli, Jack
AU - Dzielski, John
AU - Fürth, Mirjam
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/7/1
Y1 - 2022/7/1
N2 - The increased risk of reduced transverse stability by free surfaces in cargo tanks in floating vessels such as Floating Production Storage and Offloading (FPSO) units, is well known. Roll decay testing remains the most common method for determining roll damping characteristics. Few works evaluating roll characteristics coupled with the effect of liquid motion exist. In this paper, a series of roll decay tests are carried out for a FPSO model with a pair of two-row prismatic tanks. The four compartment tanks are filled to different levels, and the equivalent linear damping is obtained using the Quasilinear (Logarithmic Decrement) method and the Froude Energy method. The effect of draft change for each loading condition is analyzed based on the average equivalent linear damping coefficient and the effect of the liquid cargo sloshing is also discussed. The results show that an increase in liquid cargo, the location of cargo load, and the geometry of the cargo tank affect the damping of the vessel.
AB - The increased risk of reduced transverse stability by free surfaces in cargo tanks in floating vessels such as Floating Production Storage and Offloading (FPSO) units, is well known. Roll decay testing remains the most common method for determining roll damping characteristics. Few works evaluating roll characteristics coupled with the effect of liquid motion exist. In this paper, a series of roll decay tests are carried out for a FPSO model with a pair of two-row prismatic tanks. The four compartment tanks are filled to different levels, and the equivalent linear damping is obtained using the Quasilinear (Logarithmic Decrement) method and the Froude Energy method. The effect of draft change for each loading condition is analyzed based on the average equivalent linear damping coefficient and the effect of the liquid cargo sloshing is also discussed. The results show that an increase in liquid cargo, the location of cargo load, and the geometry of the cargo tank affect the damping of the vessel.
KW - Equivalent linear damping
KW - FPSO
KW - Froude Energy method
KW - Quasilinear method (logarithmic decrement method)
KW - Roll damping
KW - Roll decay
KW - Sloshing
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U2 - 10.1016/j.oceaneng.2022.111162
DO - 10.1016/j.oceaneng.2022.111162
M3 - Article
AN - SCOPUS:85130174912
SN - 0029-8018
VL - 255
JO - Ocean Engineering
JF - Ocean Engineering
M1 - 111162
ER -