Abstract
Experimental and numerical studies are performed to investigate drillship moonpool gap resonance in both stationary and transit conditions in a wave flume. This study contains an assessment of the influence of size and depth of the moonpool on the gap resonance phenomenon. An openfoam-based computational fluid dynamics (CFD) model was established, and the numerical data show good agreement with measurements from the model tests. Both piston and sloshing mode gap resonances are clearly observed. This study shows that the gap resonance frequency and wave elevation response amplitude operator (RAO) inside the moonpool are dependent on its dimensions, and the transit speed of the drillship and wave direction significantly influences the characteristics of gap resonances. It is noticed that the nearness of the wave flume sidewalls significantly influences the piston and sloshing wave elevation RAO at certain frequencies regardless of moonpool length and draft.
Issue Section:
Ocean Engineering
References
1.
Molin
, B.
, 2001
, “On the Piston and Sloshing Modes in Moonpools
,” J. Fluid Mech.
, 430
, pp. 27
–50
. 10.1017/S00221120000028712.
Faltinsen
, O.
, Rognebakke
, O.
, and Timokha
, A.
, 2007
, “Two-Dimensional Resonant Piston-Like Sloshing in a Moonpool
,” J. Fluid Mech.
, 575
, pp. 359
–397
. 10.1017/S002211200600440X3.
Molin
, B.
, Zhang
, X.
, Huang
, H.
, and Remy
, F.
, 2018
, “On Natural Modes in Moonpools and Gaps in Finite Depth
,” J. Fluid Mech.
, 840
, pp. 530
–554
. 10.1017/jfm.2018.694.
Zhang
, X.
, Huang
, H.
, and Song
, X.
, 2019
, “On Natural Frequencies and Modal Shapes in Two-Dimensional Asymmetric and Symmetric Moonpools in Finite Water Depth
,” Appl. Ocean Res.
, 82
, pp. 117
–129
. 10.1016/j.apor.2018.08.0145.
Huijsmans
, R.
, Pinkster
, J.
, and Wilde
, J.
, 2001
, “Diffraction and Radiation of Waves Around Side-by-Side Moored Vessels
,” Proceedings of the 11th International Offshore and Polar Engineering Conference
, Stavanger, Norway
, June 17–22
, pp. 406
–412
.6.
Newman
, J.
, 2003
, “Application of Generalized Modes for the Simulation of Free Surface Patches in Multi Body Hydrodynamics
,” The 4th annual WAMIT Consortium Report
, Woods Hole, MA
, Oct. 8–9
, pp. 29
–40
.7.
Chen
, X.
, 2004
, “Hydrodynamics in Offshore and Naval Application
,” Proceedings of the 6th International Conference on Hydrodynamics
, Perth, Australia
, Nov. 24–26
, pp. 1
–28
.8.
Lu
, L.
, Teng
, B.
, Sun
, L.
, and Chen
, B.
, 2011
, “Modelling of Multi-Bodies in Close Proximity Under Water Waves-Fluid Forces on Floating Bodies
,” Ocean Eng.
, 38
(13
), pp. 1403
–1416
. 10.1016/j.oceaneng.2011.06.0089.
Faltinsen
, O.
, and Timokha
, A.
, 2015
, “On Damping of Two-Dimensional Piston-Mode Sloshing in a Rectangular Moonpool Under Forced Heave Motions
,” J. Fluid Mech.
, 772
(R1
), p. 467
. 10.1017/jfm.2015.23410.
Kristiansen
, T.
, and Faltinsen
, O.
, 2008
, “Application of a Vortex Tracking Method to the Piston-Like Behaviour in a Semi-Entrained Vertical Gap
,” Appl. Ocean Res.
, 30
(1
), pp. 1
–16
. 10.1016/j.apor.2008.02.00311.
Kristiansen
, T.
, and Faltinsen
, O.
, 2010
, “A Two-Dimensional Numerical and Experimental Study of Resonant Coupled Ship and Piston-Mode Motion
,” Appl. Ocean Res.
, 32
(2
), pp. 158
–176
. 10.1016/j.apor.2009.10.00112.
Kristiansen
, T.
, and Faltinsen
, O.
, 2012
, “Gap Resonance Analyzed by a New Domain-Decomposition Method Combining Potential and Viscous Flow Draft
,” Appl. Ocean Res.
, 34
, pp. 198
–208
. 10.1016/j.apor.2011.07.00113.
Fredriksen
, A.
, Kristiansen
, T.
, and Faltinsen
, O.
, 2014
, “Experimental and Numerical Investigation of Wave Resonance in Moonpools At Low Forward Speed
,” Appl. Ocean Res.
, 47
, pp. 28
–46
. 10.1016/j.apor.2014.03.00514.
Molin
, B.
, Remy
, F.
, Camhi
, A.
, and Ledoux
, A.
, 2009
, “Experimental and Numerical Study of the Gap Resonances In-Between Two Rectangular Barges
,” Proceedings of the 13th Congress of International Maritime Association of Mediterranean
, Istanbul, Turkey
, Oct. 12–15
, pp. 1
–8
.15.
Ning
, D.
, Zhu
, Y.
, Zhang
, C.
, and Zhao
, M.
, 2018
, “Experimental and Numerical Study on Wave Response At the Gap Between Two Barges of Different Draughts
,” Appl. Ocean Res.
, 77
, pp. 14
–25
. 10.1016/j.apor.2018.05.01016.
Abeil
, B.
, 2017
, “Experimental Determination of Water Motions Inside a Moonpool
,” Proceedings of the 36th International Conference on Ocean, Offshore and Arctic Engineering
, Trondheim, Norway
, June 25–30
, pp. 1
–12
.17.
Lu
, L.
, Cheng
, L.
, Teng
, B.
, and Zhao
, M.
, 2010
, “Numerical Investigation of Fluid Resonance in Two Narrow Gaps of Three Identical Rectangular Structures
,” Appl. Ocean Res.
, 32
(2
), pp. 177
–190
. 10.1016/j.apor.2009.10.00318.
Feng
, X.
, Bai
, W.
, Chen
, X.
, Qian
, L.
, and Ma
, Z.
, 2017
, “Numerical Investigation of Viscous Effects on the Gap Resonance Between Side-by-Side Barges
,” Ocean Eng.
, 145
, pp. 44
–58
. 10.1016/j.oceaneng.2017.08.06019.
Moradi
, N.
, Zhou
, T.
, and Cheng
, L.
, 2015
, “Effect of Inlet Configuration on Wave Resonance in the Narrow Gap of Two Fixed Bodies in Close Proximity
,” Ocean Eng.
, 103
, pp. 88
–102
. 10.1016/j.oceaneng.2015.04.06320.
Yang
, S.
, Lee
, S.
, Park
, J.
, Han
, S.
, Choi
, Y.
, Do
, J.
, Kwon
, S.
, and Molin
, B.
, 2016
, “Experimental Study on Piston-and Sloshing-Mode Moonpool Resonances
,” J. Marine Sci. Technol.
, 21
(4
), pp. 715
–728
. 10.1007/s00773-016-0386-x21.
Molin
, B.
, 2017
, “On Natural Modes in Moonpools with Recesses
,” Appl. Ocean Res.
, 67
, pp. 1
–8
. 10.1016/j.apor.2017.05.01022.
Sivabalan
, P.
, and Surendran
, S.
, 2017
, “Numerical and Experimental Study on Varying Cross-Section of Moonpool for a Drill Ship
,” Ships Offshore Struct.
, 12
(6
), pp. 885
–892
. 10.1080/17445302.2017.130134023.
Zhang
, X.
, and Bandyk
, P.
, 2013
, “On Two-Dimensional Moonpool Resonance for Twin Bodies in a Two-Layer Fluid
,” Appl. Ocean Res.
, 40
, pp. 1
–13
. 10.1016/j.apor.2012.11.00424.
Zhang
, X.
, and Bandyk
, P.
, 2014
, “Two-Dimensional Moonpool Resonances for Interface and Surface-Piercing Twin Bodies in a Two-Layer Fluid
,” Appl. Ocean Res.
, 47
, pp. 204
–218
. 10.1016/j.apor.2014.05.00525.
Jiang
, S.
, Bai
, W.
, and Tang
, G. Q.
, 2018
, “Numerical Simulation of Wave Resonance in the Narrow Gap Between Two Non-Identical Boxes
,” Ocean Eng.
, 156
, pp. 38
–60
. 10.1016/j.oceaneng.2018.02.05526.
Jiang
, S.
, Bai
, W.
, Cong
, P.
, and Yan
, B.
, 2019
, “Numerical Investigation of Wave Forces on Two Side-by-Side Non-Identical Boxes in Close Proximity Under Wave Actions
,” Marine Struct.
, 63
, pp. 16
–44
. 10.1016/j.marstruc.2018.08.00727.
Jiang
, S.
, Bai
, W.
, and Tang
, G.
, 2019
, “Numerical Investigation of Piston-Modal Wave Resonance in the Narrow Gap Formed by a Box in Front of a Wall
,” Phys. Fluids
, 31
(5
), p. 052105
. 10.1063/1.509254228.
Zhao
, W.
, Wolgamot
, H.
, Taylor
, P.
, and Eatock Taylor
, R.
, 2017
, “Gap Resonance and Higher Harmonics Driven by Focused Transient Wave Groups
,” J. Fluid Mech.
, 812
, pp. 905
–939
. 10.1017/jfm.2016.82429.
Wang
, H.
, Wolgamot
, H.
, Draper
, S.
, Zhao
, W.
, Taylor
, P.
, and Cheng
, L.
, 2019
, “Resolving Wave and Laminar Boundary Layer Scales for Gap Resonance Problems
,” J. Fluid Mech.
, 866
, pp. 759
–775
. 10.1017/jfm.2019.11530.
Tan
, L.
, Lu
, L.
, Tang
, G.
, Cheng
, L.
, and Chen
, X.
, 2019
, “A Viscous Damping Model for Piston Mode Resonance
,” J. Fluid Mech.
, 871
, pp. 510
–533
. 10.1017/jfm.2019.30231.
Hirt
, C.
, and Nichols
, B.
, 1981
, “Volume of Fluid (VOF) Method for the Dynamics of Free Boundaries
,” J. Comput. Phys.
, 39
(1
), pp. 201
–225
. 10.1016/0021-9991(81)90145-532.
Jacobsen
, N. G.
, Fuhrman
, D. R.
, and Fredsøe
, J.
, 2012
, “A Wave Generation Toolbox for the Open-source Cfd Library: Openfoam®
,” Int. J. Numer. Methods Fluids
, 70
(9
), pp. 1073
–1088
. 10.1002/fld.272633.
Segur
, H.
, Henderson
, D.
, Carter
, J.
, Hammack
, J.
, Li
, C.
, Pheiff
, D.
, and Socha
, K.
, 2005
, “Stabilizing the Benjamin–Feir Instability
,” J. Fluid Mech.
, 539
, pp. 229
–271
. 10.1017/S002211200500563X34.
Feng
, A.
, and Price
, W.
, 2018
, “Numerical Simulations of the Hydrodynamic Responses of a Body Interacting with Wave and Current Over a Sloping Seabed
,” Appl. Ocean Res.
, 79
, pp. 184
–196
. 10.1016/j.apor.2018.08.00435.
Chen
, X.
, 1994
, “On the side wall effects upon bodies of arbitrary geometry in wave tanks
,” Appl. Ocean Res.
, 16
(6
), pp. 337
–345
. 10.1016/0141-1187(94)00017-4Copyright © 2020 by ASME
You do not currently have access to this content.
