液体晃荡的有限元分析

A Finite Element Analysis of Liquid Sloshing

用非线性瞬时分析有限元计算大自由表面运动的不可压流体－结构相互作用问题。流体和结构区域用混合的拉格朗日－欧拉运动描述（ＡＬＥ），同时以罚参数法约掉不可压流体的质量连续方程，减少了计算工作量。采用比率型结构本构方程以适应广泛的变形模型，最后用混合时间的隐显式有限元积分法（ｍＥ－Ｉ）求解有限元方程。

A nonlinear finite element transient analysis is made to study the interaction betweenthe incompressible fluid and structure with large amplitude free surface motion,The fluidand structure subdomains are described by arbitrary Lagrangian- Eulerian(ALE)motion. The mass continuity equations of incompressible fluid are eliminated by the introduction ofthe penalty function method so that the computing time is shortened.The rate type constitu-tive equation for structure is used to suit the deformation model.The mixed-time implicit-ex-plicit integration technique is used to numerically Solve the FE equations.