波浪条件下小型回转体高速入水动力学特性研究

Dynamic Characteristics of High Speed Water Entry of Small Rotary Bodies Under Wave Conditions

摘要:

采用光滑粒子流体动力学（SPH）方法，建立了刚体入水六自由度响应模型，实现了波浪环境下小型回转体高速入水过程的数值模拟。对波浪环境下小型回转体高速入水过程中的运动姿态、冲击载荷进行讨论分析，结果表明，波浪条件下入水点相位不同，导致回转体实际入水角不同，实际入水角越大，入水冲击载荷越大，弹道越稳定；实际入水角越小，入水冲击载荷越小，弹道越易发生失稳。本研究表明入水点相位对小型回转体弹道特性和冲击载荷产生影响，进而为波浪条件下跨介质武器低载稳定入水提供基础性技术支撑。

Abstract:

The six-degree-of-freedom response model of rigid body entering the water was established by using the smooth particle fluid dynamics (SPH) method, and the numerical simulation of the high-speed water entry process of small rotary body in the wave environment was realized. The results show that the actual entry angle of the rotary body is different, and the larger the actual entry angle, the greater the impact load and the more stable the trajectory is. The smaller the actual water entry angle, the smaller the impact load into the water, and the more likely the trajectory is to be unstable. This paper illustrates the influence of the phase at the water entry point on the ballistic characteristics and impact load of the small rotary body, and then provides basic technical support for the low-load and stable water entry of cross-media weapons under wave conditions.