空投UUV入水冲击有限元仿真

摘要

There is a strongly impact on the airborne Unmanned Underwater Vehicle (shorted as UUV) during it entering the water. Therefore, it's very important to master the regularity of impact for the study of the shell strength design and the safety water-entry method of UUV. The water-entry impacting models of Airborne UUV were established, and the impact forces of water-entry about the UUV were calculated with different water-entry angles and different velocities by MSC. Dytran. Simulation results show that both the axial and normal impact force of UUV will increase as the velocity getting larger, the axial impact force will increase and the normal impact force will decrease as the water-entry angle getting larger.%空投无入水下航行器(简称UUV)在入水的过程中,会受到水的强烈的冲击作用.掌握UUV在不同工况入水时所受冲击力的情况,对研究空投UUV壳体强度设计和安全入水方法都有着非常重要的作用.建立了UUV入水有限元仿真模型,并利用MSC.Dytran对UUV在多种工况下入水时所受冲击力的情况进行了计算.仿真结果表明,随着入水速度的增大,UUV所受轴向力和法向力均增大；随着入水角度的增大,UUV所受轴向力增大,而法向力减小.