船用LNG储罐和管道因传输特殊性质的LNG介质，储罐和管道必须满足相关的强度要求。因此，对储罐和管道应力计算十分必要。储罐的外罐体直接与管道相连接，外罐在管道接口处的变形，对LNG管道应力值和分布有很大影响。文本运用有限元方法，对某型船用LNG储罐和管道分别进行建模分析，将外罐体管道接口处的应变作为管道位移载荷，对管道一次应力和二次应力校核，探索船用LNG储罐和管道应力分析方法，为储罐和管道设计提供理论依据。
For the specific characteristics of LNG, marine LNG tank and pipelines have to meet certain requirements for strength. Therefore, the strength calculation on the tank and pipelines is indispensable. The outer tank wall connects to the pipelines directly. Hence, its deformation at the pipeline connections has a great impact on the value and distribution of the pipeline stress. With the aid of FEM, this paper completed the modeling analysis of marine LNG tank and pipeline respectively, as well as twice stress check on the pipeline, taking the deformation at the pipeline connections as displacement loading. Finally, the stress analysis method on marine LNG tank and pipelines has been explored, which will provide the theoretical basis for the designs of tank and pipelines.
2018,(): 35-40 收稿日期：2016-12-06
DOI：10.3404/j.issn.1672-7649.2018.01.006
分类号：U664.84
基金项目：工信部江海直达节能环保集装箱示范船开发资助项目（20151g0006）
作者简介：甘绍警(1991-),男,硕士研究生,研究方向为船舶动力装置性能分析及振动噪声控制
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