Numéro : 2621 - Year : 2012
Sloshing loads determination – application to floating gas storage and liquefaction units (FLNG, FSRU)
Louis DIEBOLD, Bureau Veritas – Département Recherche – Neuilly-Sur-Seine
Nicolas MOIROD, Bureau Veritas – Département Recherche – Neuilly-Sur-Seine
Thomas GAZZOLA, Bureau Veritas – Département Recherche – Neuilly-Sur-Seine
Eric BAUDIN, Bureau Veritas – Département Recherche – Neuilly-Sur-Seine
Nowadays, the offshore LNG (Liquefied Natural Gas) terminals (FLNG, FSRU, LNG FPSO) have become a reality, and the initial feasibility studies evolved to the actual project achievements like the SHELL-FLNG which will hold the title of the world’s largest floating object ever constructed. These floating LNG terminals (FLNG, FSRU…) shall operate at all filling levels unlike standard LNGC which operate only at low or high filling levels during navigation. Especially, tanks’ walls shall withstand the possible high sloshing pressures caused by violent LNG flows at low partial fillings. First, this paper will present the different parameters that influence sloshing phenomenon. Then Bureau Veritas sloshing assessment which enables to determine sloshing loads in order to evaluate the hull scantling will be presented. Each step of this methodology will be illustrated with some validations relying on comparisons between calculations and experiments.