液化天然气船在运输过程中由于船体的运动引起货物重心加速度而产生压力，常采用二维加速度椭圆法或三维加速度椭球法计算。本文基于《国际散装运输液化气体船舶构造与设备规则》（IGC）相关规则，在对液货舱内部压力解析分析基础上, 编制相关三维加速度计算应用程序，开展三维加速度椭球法、二维加速度椭圆法、DNV船级社法对典型液舱内部压力计算精度对比研究。对某22 000 m3液化气船C型液货舱内部压力计算分析，获得其内部压力分布规律，并开展横稳心高GM值对C型液货舱内部压力的影响研究。
In the transportation process of liquefied natural gas (LNG) ship, the pressure is caused by the acceleration of cargo center of gravity due to the motion of the ship.This article is based on the international bulk transport liquefied gas ship construction and equipment of rules rules (IGC), based on the resolution of the cargo tank internal pressure, prepare the relevant three-dimensional acceleration computing applications, carry out three-dimensional acceleration ellipsoid method, two-dimensional acceleration ellipse method, DNV classification method for typical tank internal pressure calculation accuracy analysis. Then, the internal pressure of a 22 000 m3 liquefied gas carrier C type cargo tank is calculated and analyzed, and the internal pressure distribution law is obtained. Finally, the influence of high GM value of transverse metacenter on internal pressure of cargo tank is studied.
2023,45(18): 45-50 收稿日期：2022-07-01
DOI：10.3404/j.issn.1672-7649.2023.18.008
分类号：U663.2
基金项目：江苏省博士后科研资助计划项目（2021K562C）
作者简介：董国忠(1996-),男,硕士研究生,研究方向为船舶与海洋结构物设计制造
参考文献：
[1] 钟小晶, 胡可一, 庄友榕. 液化气船A型独立液货舱内部压力计算方法和软件[J]. 造船技术, 1999(3): 27–29
[2] 黎志昌, 方江敏, 付小方. LNG运输船C型独立液货舱载荷及应力分析[J]. 船舶工程, 2011, 33(1): 1–4
[3] 吴嘉蒙, 吕立伟, 蔡诗剑. 液化天然气船货舱内部压力研究[J]. 上海造船, 2011(1): 37–42
[4] 朱达新. 对液货舱内部压力计算的研究[J]. 广州航海学院学报, 2021, 29(2): 33–37
[5] 娄本强, 张洪军, 孙立, 等. 独立C型LNG运输船鞍座结构的数值模拟方法研究[J]. 江苏科技大学学报(自然科学版), 2021, 35(6): 1–8
[6] IMO. International code for the construction and equipment of ships carrying liquefied gases in bulk (IGC Code)[S]. 2016.
[7] Lloyd’s Register. Rules and regulations for the construction and classification of ships for the carriage of liquefied gases in bulk[S]. 2008.
[8] Rules for Classification of Ships. Pt5. Ch. 5. Liquefied gas carriers[S]. Det Norske Veritas, 2007.
[9] 付喜华. 液化气船液货舱内部压力解析计算[J]. 船舶与海洋工程, 2018, 34(6): 7–11
[10] 王亮, 肖蕾, 陈熙. 液化气船独立液货舱内部压力计算方法研究与应用[J]. 船舶与海洋工程, 2020, 36(3): 17–20
