水下载荷对垂直发射潜航器结构影响仿真研究

目的研究水下载荷对垂直发射潜航器结构的影响。方法采用流体分析软件计算潜航器周围的压力场分布,利用有限元分析软件建立水下潜航器有限元模型,将计算得到的压力场加载到潜航器有限元模型后,仿真计算潜航器在水中向上运动不同时刻的应力和变形。结果随着潜航器的上升,水对弹的轴压影响逐渐减小,潜航器的弯矩和剪切力越来越大。随着潜航器向上运动,其加速度和速度变小,水对潜航器的压力载荷也变小。潜航器发射后,尾部虽然已经不承受发射载荷,但是随着这个载荷的消失,头部的变形逐渐减小。结论由于存在攻角,潜航器在铅垂和水平方向亦有力的分量,从而使潜航器受到的水下载荷更为复杂。

Numerical Simulation on Influences of Underwater Load on Structure of Underwater Vertical Launching Vehicle

The paper aims to study the effects of underwater loading over the structure of underwater vertical launching vehicle. The pressure field around the underwater vehicle was calculated with fluid analysis software; and the finite element model was built with software of finite element analysis; the pressure field was loaded into the finite element model; the stress and the deformation of the underwater vehicle in different time of upward motion in the water was simulated and calculated. During the upward motion of the underwater vehicle, the effect of water on the axial pressure of spring was reduced; the bending moment and shear farce of it increased. The acceleration and velocity was reduced. The pressure loading of water on the underwater vehicle was reduced. After the vehicle was launched, there was launching loading at the tail, and the deformation of loading also disappeared accordingly Because of attack angel, the underwater vehicle has both horizontal and vertical loading, so the underwater loading of vertical underwater is more complex.