A DIRECT ASSESSMENT APPROACH FOR STRUCTURAL STRENGTH EVALUATION OF CARGO CONTAINMENT SYSTEM UNDER SLOSHING INSIDE LNGC TANKS BASED ON FLUID STRUCTURE INTERACTION

摘要

The sloshing phenomenon is one of the most important and challenging issues for the design of cargo containment systems of LNG carriers and is being studied by various research groups in many countries. In this paper, a direct assessment approach based on fluid structure interaction is proposed to assess the structural safety of cargo containment systems against extreme sloshing loads. In the course of developing the methodology, two technical issues are mainly dealt with; (1) how to efficiently apply a numerical method for sloshing phenomena and (2) how to verify the structural safety criteria of cargo containment system against sloshing. The developed methodology is applied to a membrane-type cargo containment system of a large LNG carrier built in Samsung Shipyard.