机载布放式AUV入水冲击仿真研究

摘要

The airborne launched AUV is an autonomous underwater vehicle, which is transported to the specific sea area by aircrafts, and enters into water in certain conditions to accomplish scheduled work. The airborne launched AUV will endure very large force at the moment it enters water, which may cause dam-ages to the structures, inner apparatus and even lose the control of trajectory. In this paper, the computa-tional fluid dynamics (CFD) method is used to simulate and study the water entry impact of airborne launched AUV. The loading process of AUV is computed in different water entry velocity and different water entry angle. The velocity response curves and stress response curves are attained in different water entry condi-tions. The conclusions can provide references for the structure design and launched conditions of airborne launched AUV.%机载布放式AUV是利用载机运送至特定海域上空，在一定条件下通过空投方式进入水下，完成预定工作的自主水下航行器。 AUV入水时会受到巨大的载荷冲击，严重时会导致机体折断、元器件失灵，甚至引起弹道失控。为此，文章采用计算流体力学（Computational Fluid Dynamics，CFD）方法对机载布放式AUV的入水冲击问题进行了数值仿真研究。对不同入水速度、不同入水角度下AUV受力过程进行了计算，得出了不同入水条件下的速度响应曲线和压力响应曲线，可为机载布放式AUV的机体结构设计和投放条件研究提供参考。