Research on ultimate limit state for liquid natural gas cargo containment system

Tank sloshing study of large liquefied natural gas(LNG)carriers is very important when ship size and working state change vastly.This paper described the characteristics of liquid natural gas cargo containment system structure,calculated the ultimate limit state of 156 800 cubic meters of liquid natural gas cargo containment system structure using nonlinear finite element,and analyzed comparably results of three kinds of boundary conditions.Finally the nonlinear finite element method proved by test and formula which is feasible for engineering design.