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Keywords: bilge keel
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Proceedings Papers

Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-336
... and aspects of the numerical setup optimization in order to enhance understanding of factors influencing precision, computational efficiency and reliability in such numerical applications. Moreover, different bilge keel configurations along with the presence of other submerged appendages are studied...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-516
... ABSTRACT Tugs have a simple hull form and good maneuverability. This paper works on the hydrodynamic performance of a harbor tug with a skeg and bilge keels at full drifting conditions. Virtual oblique towing tank (OTT) tests are conducted via Volume of Fraction (VOF) method by solving...
Proceedings Papers

Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-378
... by existing experimental data, and the influences of rudder and bilge keels are studied by varied forward speeds, roll amplitudes and roll periods. The results show that the rudder and bilge keels contribute noticeably to roll damping with higher speed and larger roll amplitude, and the bilge keel interacts...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-3169
... and medium-sized rescue ships, small transport ships and so on. Compared to the ship of large displacement, because of the limitation of tonnage measurement of this kind of ship, the seakeeping especially rolling performance under the high sea condition is bad. Anti-rolling devices such as bilge keels...
Proceedings Papers

Paper presented at the The 26th International Ocean and Polar Engineering Conference, June 26–July 2, 2016
Paper Number: ISOPE-I-16-657
... such as Reynolds or Froude are not satisfied for the drag forces. wind tunnel test numerical simulation experimental result force coefficient coefficient ocean basin test velocity profile boundary layer form drag maximum cx current load coefficient basin test bilge keel pressure distribution...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-673
...$57SDJHV KWWSZZZ NULVR UH NU HQJ VWXG\ LQVWLWXWLRQ KWPO DW )HE 1199 ship magnitude emergence static heel test result characteristic history bilge keel heel angle model ship equation mathematical model passenger transportation coefficient coordinate system test result model test ro...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-677
... Abstract The roll damping of a conventional ship cross-section, equipped with bilge-keels, is studied using an efficient, hybrid numerical code called PVC3D, based on Finite Volume Method, for different oscillation periods and amplitudes. It is shown that the linear free-surface boundary...
Proceedings Papers

Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-524
... ABSTRACT Bilge keels of FPSO units are often connected to the vessel hull through doubler plates. These connections are difficult to inspect in-service. Fatigue tests are performed on the welds from doubler plate to vessel hull. A procedure is presented to calculate the fatigue strength...
Proceedings Papers

Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-573
... ABSTRACT In the structural design of bilge keels, hydrodynamic loads may threaten the structural integrity of both the bilge keel and of the hull itself. In the former case, it is the direct load from differential pressure that causes bending and shear at the root of the bilge keel...
Proceedings Papers

Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-483
... ABSTRACT: This paper presents a validated methodology to calculate the oscillatory loads on bilge keels of ships operating at zero forward speed in irregular sea states. To calculate these loads, the local relative fluid velocities acting normal to the bilge keel are combined with a KC...
Proceedings Papers

Paper presented at the The Nineteenth International Offshore and Polar Engineering Conference, July 21–26, 2009
Paper Number: ISOPE-I-09-412
... performed. For a proper comparison, hull in fully appended configuration, (i.e. with the rudders, bilge keels, fins, and propeller apparatus, including struts, A-brackets and the propeller shaft) has been considered. To properly understand the effect of the rotating propeller on the roll damping, model...
Proceedings Papers

Paper presented at the The Nineteenth International Offshore and Polar Engineering Conference, July 21–26, 2009
Paper Number: ISOPE-I-09-452
... demonstrated. Lastly, the effect of bilge keels on the prevention of parametric roll is investigated. KEY WORDS: Parametric roll; tumblehome hull; nonlinear dynamics; bilge keel. INTRODUCTION Recently, a tumblehome vessel is under development as a new generation high-speed monohull ship. Tumblehome hull could...
Proceedings Papers

Paper presented at the The Seventeenth International Offshore and Polar Engineering Conference, July 1–6, 2007
Paper Number: ISOPE-I-07-487
... issue of viscous roll damping simulation for ship in forced roll motion. multi-block mesh principia mesh ship sea-keeping simulation sea-keeping simulation upstream oil & gas reservoir simulation bilge keel roll angle simulation dynamometer numerical simulation hull cfd code...
Proceedings Papers

Paper presented at the The Sixteenth International Offshore and Polar Engineering Conference, May 28–June 2, 2006
Paper Number: ISOPE-I-06-230
... ABSTRACT The objective of this research is to model the physics of the separated unsteady viscous flow over the bilge keels of an FPSO hull subject to roll motions. A cell center based Finite Volume Method (FVM) scheme is implemented for the solution of the 2-D Navier-Stokes equations (NS2D...
Proceedings Papers

Paper presented at the The Fifteenth International Offshore and Polar Engineering Conference, June 19–24, 2005
Paper Number: ISOPE-I-05-024
... ABSTRACT The objective of this research is to understand the physics of the separated unsteady viscous flow over the bilge keels of an FPSO hull subject to roll motions and to predict the corresponding hydrodynamic coefficients. A numerical scheme which is based on the Finite Volume Method...
Proceedings Papers

Paper presented at the The Fourteenth International Offshore and Polar Engineering Conference, May 23–28, 2004
Paper Number: ISOPE-I-04-311
... in a given sea spectra can be evaluated during the design stage or when an operating area change is being considered. random seaway vakakis nonlinear falzarano coefficient vishnubhotla pm spectra bilge keel offshore supply vessel radiation phase plane prediction excitation equation ship...
Proceedings Papers

Paper presented at the The Fourteenth International Offshore and Polar Engineering Conference, May 23–28, 2004
Paper Number: ISOPE-I-04-022
... ABSTRACT Several roll motion reduction devices are reviewed and suggested for the application in FPSO. The firstly suggested solution is the shape of the bilge. The next is a bilge keel. The last suggestion is the ART (antirolling tank). Typical U-tube type ART is designed for a FPSO...
Proceedings Papers

Paper presented at the The Fourteenth International Offshore and Polar Engineering Conference, May 23–28, 2004
Paper Number: ISOPE-I-04-092
... shedding strength from bilge keels and pressure distribution on the hull surface generated by them are taken into account. The predicted results are compared with experimental results to confirm the accuracy of the prediction method. Using the method some effects on the roll damping of a FPSO...
Proceedings Papers

Paper presented at the The Thirteenth International Offshore and Polar Engineering Conference, May 25–30, 2003
Paper Number: ISOPE-I-03-275
... cylinder bilge keel coefficient vorticity-diffusion theory time history free-surface random-vortex method configuration bilge-keel configuration free surface boundary condition roll hydrodynamic blob hydrodynamic coefficient frequency amplitude fsrvm Sway and Roll Hydrodynamics...

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