柔性构件对液舱晃荡行为的影响  

Effect of Flexible Components on Sloshing of Liquid Tank

作　　者：傅振航 邹昶方 龚宸 马园园 FU Zhenhang;ZOU Changfang;GONG Chen;MA Yuanyuan(School of Ocean Engineering,Jiangsu Ocean University,Lianyungang 222005,Jiangsu,China)

机构地区：[1]江苏海洋大学海洋工程学院,江苏连云港222005

出　　处：《船舶工程》2024年第5期24-32,共9页Ship Engineering

基　　金：江苏海洋大学研究生科研与创新计划项目(KYCX2022-69)。

摘　　要：液舱晃荡可能引起强烈的砰击载荷,对舱壁结构安全产生威胁。传统的制荡方法是在舱内内置各种刚性构件,因此提出在舱底内置一竖向柔性构件的方法进行有效制荡。基于有限元法(FEM)和流体体积法(VOF)建立流体-挡板-液舱流固耦合(FSI)晃荡数值计算模型。在多种激励工况下,针对不同抗弯刚度的柔性构件,利用晃荡过程柔性构件的变形能与晃荡液体的动能相互转化以及构件对运动自由液面的约束作用,研究柔性构件的制荡效果。结果表明:在合适的抗弯刚度下,柔性构件既约束自由液面运动,又大量吸收晃荡流体的动能而转化为变形能,从而达到更佳的制荡效果。Liquid tank sloshing may cause strong slamming loads and pose a threat to the safety of bulkhead structures.The traditional method of anti-sloshing is to build various rigid components in the cabin,so a method of building a vertical flexible component in the bilge is proposed for effective anti-sloshing.Based on the finite element method(FEM)and the volume of fluid(VOF)method,a fluid-baffle-liquid tank fluid-solid coupling(FSI)sloshing numerical calculation model is established.Under various excitation conditions,for flexible components with different bending stiffness,the anti-sloshing effect of flexible components is studied by using the mutual transformation between the deformation energy of flexible components and the kinetic energy of sloshing liquid and the constraint effect of components on the free surface of moving liquid.The results show that under the appropriate bending stifness,the flexible component not only constrains the free surface motion,but also absorbs a large amount of kinetic energy of the sloshing fluid and converts it into deformation energy,so as to achieve better anti-sloshing effect.

关 键 词：柔性构件 液舱 晃荡 制荡 抗弯刚度 流固耦合 

分 类 号：U663.85[交通运输工程—船舶及航道工程]