SEAKEEPING AND SLOSHING ASSESSMENT METHODOLOGY FOR FLOATING LNG TERMINALS

摘要

A methodology for prediction of life-time design slosh-induced loads for floating liquefied natural gas (LNG) terminals is presented. The methodology is in general common to slosh-induced load assessment of all LNG vessels. Additional considerations specific to FLNGs and FSRU terminals are discussed. Vessel motion responses and slosh loads are computed for strength assessment of pump tower and containment system structure. Present paper demonstrates the numerical simulation based methodology by considering two design conditions, a transit LNG carrier mode and a site-specific terminal mode. Slosh coupling effects are accounted in determining the vessel motion responses. Slosh-induced loads are determined using multiphase finite volume method (FVM) based open-source CFD solver OpenFOAM. Dependency of statistical analysis on design basis, assessment methodology and its consequences on derived sloshing loads are discussed. Finally, application of these loads for structural analysis is discussed.