LNG船液舱围护系统结构极限承载力研究

摘要

在船舶尺度和营运状态与传统条件发生很大变化的情况下,大型液化天然气船(LNG)液舱晃荡研究显得尤为重要.本文首先介绍了LNG船液舱围护系统的结构特点,然后以15.68万立方LNG船液舱围护系统结构为对象,采用非线性有限元方法计算其极限强度,并比较分析3种边界条件下的结果,最后用试验和解析公式验证本文方法是可行的,适用于工程设计.%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.