Study on Structural Strength of Mark III type LNG Cargo Containment System by Idealized Triangular Impulse Load

Abstract

It has been well known the sloshing pressure has complex shape and various patterns. The pattern of sloshing pressure is variously characterized by the pressure amplitude, duration time and skewness. The structural response induced by the sloshing pressure is also affected by the pattern of sloshing pressure and the type of structural members. In order to understand the structural response by the perspective view of categorized pattern, it is more efficient to make simple sloshing pressure pattern than to reflect the complex pressure history. In this study, the sloshing pressures obtained by the small scale model test are simplified with respect to their duration and skewness. Dynamic analyses of Mark-III LNG CCS are then parametrically performed with the consideration of various types of sloshing impact. Meanwhile, the failure pressures given the duration and skewness are investigated after parametric calculations are conducted to investigate the effect of pressure parameters on the structural response.

Strength Analysis of Mark III Cargo Containment System using Anisotropic Failure Criteria

“…Previously mentioned, monotonically increasing loads with regular time steps are used in the strength analysis procedure for the purpose of providing the basic strength design information of Mark III CCS plate in the preliminary design stage. If dynamic loads having very short duration time are considered in the strength analysis of Mark III CCS plate, larger failure loads are expected especially for the initial failure state (Hwang et al, 2014).…”