液舱内三维液体非线性晃荡的数值模拟  

Numerical simulation of non-linear sloshing in 3D tank

作　　者：端木玉[1] 朱仁庆 

机构地区：[1]江苏海事职业技术学院船舶与港口工程系,江苏南京211170 [2]江苏科技大学船舶与海洋工程学院,江苏镇江212003

出　　处：《江苏科技大学学报（自然科学版）》2012年第4期315-321,共7页Journal of Jiangsu University of Science and Technology:Natural Science Edition

摘　　要：晃荡是一种非常复杂的非线性液体流动现象,载液船舶的晃荡问题颇受关注,因为在外界的激励下液舱内会产生剧烈的晃荡现象,巨大的晃荡冲击力会造成结构的破坏.文中建立了三维晃荡数学模型及数值计算模型,借助处理自由表面的VOF(volume of fluid)方法对液舱内液体晃荡的自由表面进行追踪,编制程序实现了液舱内三维液体非线性晃荡的数值模拟,并就三维刚性液舱内粘性液体的自由晃荡和强迫晃荡做了分析,讨论了液体不同粘性系数对晃荡的影响.模拟结果证明了三维晃荡理论的可行性.Liquid sloshing is a complex nonlinear phenomenon and much attention has been payed to the sloshing of liquid carriers. Sloshing induced by external excitations is violent and can damage the carrier structure. In this paper, a mathematical model and a numerical model are established for 3 D sloshing. VOF method is adopted to reconstruct the free surface of sloshing in the tank. Numerical simulation of 3 D sloshing is realized through programming. Free sloshing and forced sloshing of viscous liquid in a 3D tank are performed to discuss the influence of viscosity coefficient. The results show that it is feasible to use the numecical method to simulate liquid sloshing.

关 键 词：三维液体晃荡 液舱 VOF法 自由液面 

分 类 号：U661.1[交通运输工程—船舶及航道工程]