Sloshing assessment of the LNG floating units with membrane type containment system where we are?

The paper gives an overview of the current status of the methods and methodologies which are in use for the evaluation of the structural response induced by sloshing impacts. First the overall problem (seakeeping, sloshing, impacts, statistics…) is discussed and then the accent is put on the modeling of hydro-structure interactions which occur during the severe sloshing impacts in the tanks of the Liquefied Natural Gas (LNG) Carriers of membrane type. The main conclusion is that the sloshing assessment procedures are still under investigations and there are still no fully satisfactory methods and methodologies available to solve the problem fully consistently within the so called direct calculation approach. That is why, for the time being, a relatively simplified procedures are used in practice.