基于耦合欧拉-拉格朗日方法的浮筒着水数值仿真

Numerical Simulation on Water Impact of Float Based on Coupled Eulerian-Lagrangian Method

基于耦合欧拉-拉格朗日(CEL)方法对浮筒着水进行数值仿真。建立浮筒着水三维模型,在保持浮筒质量、水平速度不变的情况下,利用三维模型对不同初始姿态角和下沉速度时浮筒着水工况进行数值仿真,最后对比各工况下垂直加速度、垂直速度、姿态角时历曲线。结果表明:下沉速度越大,浮筒所受载荷越大,初始姿态角越小,浮筒发生第二次弹跳的时间就越早;垂直加速度的仿真结果与水池着水试验结果比较吻合。

In this paper,a numerical simulation study on water impact of float is carried out by using the coupled Eulerian-Lagrangian(CEL)method.A three-dimensional model of water impact of float is built.The simulation is performed for water impact at different initial attitude angles and sinking speeds when keeping the weight and horizontal velocity of the float unchanged.Then,the time-history curves of vertical acceleration,vertical velocity and attitude angle under each working condition are compared.It is shown that the sinking speed is higher,the impacting load on the float is greater,the initial attitude angle is smaller,the second bounce of the float will occur earlier.The simulation results of the vertical acceleration are in good agreement with experimental results.