运行VOF法模拟LNG液舱的晃荡特性

摘要

With the trend towards offshore LNG production and offloading, sloshing of LNC in partially filled tanks has become an important research subject for the offshore industry. LNC sloshing can induce impact pressures on the containment system and can affect the motions of the LNG carrier. The study first presented the details of a numerical model with Volume of Fluid (VOF) method; then the corresponding numerical simulation method to the sloshing characteristics in a LNG ship tank was given; finally, some simulation results were utilized to discuss some main parameters (such as the loading rate, the excitation frequency and the rolling angle amplitude) influencing the sloshing dynamic pressure characteristics. Based on the above contents, the LNG sloshing load characteristics and the corresponding measures for preventing the sloshing were given.%液舱晃荡引起的载荷己成为航行中载液船舶安全性评估的重要内容之一、以及船舶结构动力学的一个热点.文中首先运用VOF法建立LNG晃荡液舱模型,给出对LNG液舱晃荡特性数值模拟方法,运用模拟结果讨论不同工况(如装载率、频率、横摇角度幅值)下晃荡动压特性,在此基础上给出了LNG液舱的晃荡载荷特性与抑制晃荡的措施.