The study of water entry cavity and the analysis of load characteristics are hot topics in water entry research. The coupled Euler–Lagrange method is used to carry out simulation research on the water entry process of a cylinder. Aiming at the water vapor mixing phenomenon caused by structure slamming on the water at the initial time of water entry, the slamming load is further studied by correcting the sound speed in the water. The differences between the calculated results obtained by adjusting the number of units in the numerical simulation prove the convergence of the numerical method. Water entry experiments of a cylinder were carried out, and the results are in good agreement with the simulation data. The motion state simulation and analysis are carried out for the process of water entry with different initial speeds and angles. The changes in the structure’s positions, air cavities, and slamming loads are obtained. The rule of slamming pressure with the water entry angle and the relationship between pressure and acceleration are determined.

入水空腔的研究和载荷特性分析是入水研究的热点。采用耦合欧拉-拉格朗日方法对圆柱体进水过程进行仿真研究。针对结构入水初始时撞击水面引起的水汽混合现象，通过修正水中声速，进一步研究了撞击载荷。数值模拟中调整单元数量所得到的计算结果的差异证明了数值方法的收敛性。进行了气缸进水实验，结果与模拟数据吻合较好。对不同初始速度和角度的入水过程进行运动状态仿真分析。获得结构位置、气腔和撞击载荷的变化。确定了砰击压力随进水角的变化规律以及压力与加速度的关系。