基于边界元法的FLNG三维液舱晃荡研究  

A Study of Three Dimensional Sloshing in FLNG Tank withBoundary Element Method

作　　者：赵东亚[1] 胡志强[1] 陈刚[1,2] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]中国船舶及海洋工程设计研究院,上海200011

出　　处：《中国造船》2016年第A01期45-53,共9页Shipbuilding of China

摘　　要：基于势流理论,采用边界元数值方法预报三维FLNG液舱中的晃荡情况.根据编写的计算程序计算不同激励下液舱的晃荡,分析激励频率和激励模态对晃荡的影响.研究发现：对于横荡激励工况,固有频率下的激励可以引起晃荡的共振现象;对于垂荡激励的工况,当激励处于不稳定区域时也将引起晃荡发散现象.针对流体粘性引起的能量耗散现象,在控制方程中引入人工粘性项来模拟晃荡的衰减过程,取得了比较理想的计算结果.Based on potential theory, a numerical code is developed to calculate 3 dimensional sloshing in FLNG liquid tank. Then, sloshing in tanks under different excitations is calculated, while effects of excitation frequency and modes are analyzed. It is found that the resonance phenomenon can be induced when horizontal excitation frequency equals to the natural frequency. Similar resonant sloshing can also be induced under unstable vertical excitation. Considering energy dissipation caused by viscous effects, artificial damping term is introduced in the governing equations, and good agreements are obtained.

关 键 词：FLNG 势流理论 边界元法 晃荡 

分 类 号：U674.133[交通运输工程—船舶及航道工程]