IJME 436

Paper Title: Pressure Impulse Diagram of the FLNG Tanks Under Sloshing Loads

Authors

S E Lee, The Korea Sip and Offshore Research Institute (Lloyd's Register Research Centre of Excellence) at Pusan National University, Korea and Southampton Marine and Maritime Institute, University of Southampton, UK
J K Paik, Pusan National University, Korea and University College London, UK

Summary 

Sloshing impact loads can cause severe structural damage to cargo tanks in liquefied natural gas floating production storage offloading units (LNG-FPSOs or FLNGs). Studies of sloshing can be classified into two types, namely, hydrodynamics-related and structural mechanics-related studies. This study is a sequel to the authors’ previous studies (Paik et al. 2015; Lee et al. 2015), but is more related to issues of structural mechanics. In this study, a new method for probabilistic sloshing assessment, which has been previously developed by the authors, is briefly explained. The nonlinear impact structural response characteristics under sloshing impact loads are examined by a nonlinear finite element ANSYS/LS-DYNA method. An iso-damage curve, representing a pressure-impulse diagram, is derived for the self-supporting prismatic-shape IMO B type LNG cargo containment system of a hypothetical FLNG. The insights developed from this work can be useful for the damage-tolerant design of cargo tanks in FLNGs.

Reference

Transactions RINA, Vol 160, Part A2, International Journal Maritime Engineering, Apr-Jun 2018 

DOI Number

DOI No: 10.3940/rina.ijme.2018.a2.436

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