中文摘要：

新型LNG船的液仓内液体晃荡涉及非线性自由表面大变形运动。针对容器的运动所激发的内部流体的强迫晃荡问题,该文运用光滑质点水动力学(SPH)方法对二维矩形水槽的纵荡过程和纵摇过程进行了数值模拟。纵荡过程中边界处的自由液面高度的时间历程曲线与前人的结果相比符合较好,结果还显示了当激励频率接近容器一阶固有频率时出现了对容器上边界的砰击和自由水面的破碎现象,并分析了砰击作用对计算的影响;同时考虑纵荡和纵摇激励时,模拟表明当相位相同时波面的运动幅度最小,而相位差为180度时波面的运动幅度最大,并且其综合效果是非线性的。

英文摘要：

Sloshing in LNG tankers refers to extremely large deformation of the nonlinear free surface. Aiming at the compulsive sloshing of the fluid induced by the motion of containers, a study on the application of the Smoothed Particle Hydrodynamics (SPH) to the simulation of fluid flows in a two dimensional tanker in the surge and pitch motions is presented. The computed free surface elevation at tank boundary is close agreement with the experimental and numerical data available when the tank is under surge excit...