Wet Drop Impact Response Analysis of Cargo Containment System in Membrane-type LNG Carrier using FSI Technique of LS-DYNA

摘要

While the structural safety assessment of Cargo Containment System (CCS) in membrane type LNG carriers has to be carried out in consideration of sloshing impact pressure, it is very difficult to figure out its dynamic response behaviors due to its very complex structural arrangements/materials and complicated phenomena of sloshing impact loading. In this study, diverse parametric studies for the 2D water entry problem of symmetric wedges were carried out using ALE2D option of LS-DYNA code and validated with wet drop test results, and wet drop impact response analyses of Mark III membrane-type LNG CCS were performed again using Fluid-Structure Interaction (FSI) analysis technique of LS-DYNA code in considering the effects of the corrugation flexibility for the enhancement of shock response analysis technique accuracy.