Toward a Probabilistic Approach to Determine Nominal Values of Tank Sloshing Loads in Structural Design of Liquefied Natural Gas FPSOs

The aim of this study is to develop a new probabilistic approach to determine nominal values for tank sloshing loads in structural design of LNG FPSO (liquefied natural gas, floating production, storage, and offloading units). Details of the proposed procedure are presented in a flow chart showing the key subtasks. The applicability of the method is demonstrated using an example of a hypothetical LNG FPSO operating in a natural gas site off a hypothetical oceanic region. It is noted that the proposed method is still under development for determining reliable estimates of extreme sloshing induced impact loads. It is concluded that the developed method is useful for determining the sloshing design loads in ship-shaped offshore LNG installations in combination with virtual metocean data and operational conditions.

[1]  Pandeli Temarel,et al.  Comparison of experimental and numerical sloshing loads in partially filled tanks , 2011 .

[2]  D. L. Garrett,et al.  Mooring- and Riser-Induced Damping in Fatigue Seastates , 2002 .

[3]  Bas Buchner,et al.  THE NUMERICAL SIMULATION OF LNG SLOSHING WITH AN IMPROVED VOLUME OF FLUID METHOD , 2004 .

[4]  Odd M. Faltinsen,et al.  Coupling of Sloshing and Ship Motions , 2003 .

[5]  Kenji Kawano,et al.  Dynamic Coupling of Seakeeping And Sloshing , 2003 .

[6]  Jianmin Yang,et al.  Recent developments on the hydrodynamics of floating liquid natural gas (FLNG) , 2011 .

[7]  Jae-Myung Lee,et al.  Direct Assessment of Structural Capacity Against Sloshing Using Dynamic Nonlinear FE Analysis , 2014 .

[8]  R. M. Isherwood.  WIND RESISTANCE OF MERCHANT SHIPS , 1972 .

[9]  Moo-Hyun Kim,et al.  The Effects of Tank Sloshing On the Coupled Responses of LNG Vessel And Floating Terminal , 2008 .

[10]  David P. Doane,et al.  Aesthetic Frequency Classifications , 1976 .

[11]  D. Darling,et al.  A Test of Goodness of Fit , 1954 .

[12]  Torgeir Moan,et al.  A probabilistic assessment of design sloshing pressure time histories in LNG tanks , 2008 .

[13]  Jeom Kee Paik,et al.  Ship-Shaped Offshore Installations: Design, Building, and Operation , 2007 .

[14]  C. G. Paton,et al.  Investigation of Sway/Yaw Motions of Deepwater FPSOs , 2006 .

[15]  Jeom Kee Paik,et al.  Quantitative assessment of hydrocarbon explosion and fire risks in offshore installations , 2011 .

[16]  Arthur Veldman,et al.  Modeling two-phase flow with offshore applications , 2005 .

[17]  Torgeir Moan,et al.  Extreme sloshing and whipping-induced pressures and structural response in membrane LNG tanks , 2007 .

[18]  Odd M. Faltinsen,et al.  Resonant three-dimensional nonlinear sloshing in a square-base basin. Part 2. Effect of higher modes , 2005, Journal of Fluid Mechanics.

[19]  J.E.W. Wichers,et al.  Effect of Coupling of Mooring Lines And Risers On the Design Values For a Turret Moored FPSO In Deep Water of the Gulf of Mexico , 2001 .

[20]  Do Kyun Kim,et al.  Advanced method for the development of an empirical model to predict time-dependent corrosion wastage , 2012 .

[21]  T. W. Yung,et al.  LNG Tank Sloshing Assessment Methodology - The New Generation , 2009 .

[22]  Helio Mitio Morishita,et al.  DYNAMIC BEHAVIOUR OF A TURRET FPSO IN SINGLE AND TANDEM CONFIGURATIONS IN REALISTIC SEA ENVIRONMENTS , 2002 .

[23]  E. Fontaine,et al.  Coupled Dynamic Response of Moored FPSO With Risers , 2001 .

[24]  Jaap de Wilde,et al.  Time Domain Simulations of Side-by-Side Moored Vessels: Lessons Learnt From a Benchmark Test , 2007 .

[25]  Bo Wang,et al.  A Direct Assessment Approach for Structural Strength Evaluation of Cargo Containment System Under Sloshing Inside LNGC Tanks Based on Fluid Structure Interaction , 2008 .

[26]  Yoon-Rak Choi,et al.  Experimental Study on Behavior of Tandem and Side-by-side Moored Vessels , 2002 .

[27]  J.E.W. Wichers,et al.  A simulation model for a single point moored tanker , 1988 .

[28]  Moo-Hyun Kim,et al.  A parametric sensitivity study on LNG tank sloshing loads by numerical simulations , 2007 .

[29]  Jeom Kee Paik,et al.  A methodology for determining efficient gas detector locations on offshore installations , 2013 .

[30]  J R MacGregor,et al.  SOME TECHNO-ECONOMIC CONSIDERATIONS IN THE DESIGN OF NORTH SEA PRODUCTION MONOHULLS , 1994 .

[31]  Y. S. Shin,et al.  Structural damage and strength criteria for ship stiffened panels under impact pressure actions arising from sloshing, slamming and green water loading , 2006 .

[32]  Jaap de Wilde,et al.  Numerical Multiple-Body Simulations of Side-by-Side Mooring to an FPSO , 2001 .

[33]  S. Koshizuka.  A particle method for incompressible viscous flow with fluid fragmentation , 1995 .

[34]  Kenny Q. Ye.  Orthogonal Column Latin Hypercubes and Their Application in Computer Experiments , 1998 .

[35]  Jianmin Yang,et al.  Effects of sloshing on the global motion responses of FLNG , 2013 .

[36]  T. E. Schellin,et al.  Sloshing in rectangular and cylindrical tanks , 2002 .

[37]  Krish Thiagarajan,et al.  Weathervaning Instabilities of a FPSO in Regular Waves and Consequence on Response Amplitude Operators , 2007 .

[38]  Jeom Kee Paik,et al.  A time-dependent corrosion wastage model for seawater ballast tank structures of ships , 2004 .