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 inconsideration of sloshing impact pressure, it is very difficult to figureout its dynamic response behaviors due to its very complex structuralarrangements/materials and complicated phenomena of sloshing impactloading. In this study, diverse parametric studies for the 2D water entryproblem of symmetric wedges were carried out using ALE2D option ofLS-DYNA code and validated with wet drop test results, and wet dropimpact response analyses of Mark III membrane-type LNG CCS wereperformed again using Fluid-Structure Interaction (FSI) analysistechnique of LS-DYNA code in considering the effects of thecorrugation flexibility for the enhancement of shock response analysistechnique accuracy.