不规则波作用下回转体出水过程数值研究

Numerical Study of the Water-exit Process of Axisymmetric Vehicle under Irregular Waves

为研究波浪环境对跨介质回转体出水过程受力及运动的影响,基于P-M谱模拟了半球头回转体在不规则波条件下的出水过程,获得了回转体受力特性与运动特性。结果表明:回转体所受法向力主要来源于柱段中部不对称压力分布,所受俯仰力矩主要来源于头部和柱段尾部的不对称压力分布;回转体质心水平位移和俯仰姿态的方向与回转体遭遇的波峰波谷演化阶段相关,而量值与回转体遭遇的波峰波谷高度差相关。

Aiming to study the wave effects on the water-exit process of aquatic-aerial vehicles,a hemispherical-head axisymmetric vehicle are simulated to exit through different irregular waves based on the P-M spectrum.Both kinetic and dynamic profiles of the vehicle are extracted.The results demonstrate that the normal force mainly originates from the asymmetric pressure distribution on the cylinder part of the vehicle,and the pitching moment from the asymmetry on the head and the tail.Concerning the horizontal displacement of the gravity center and the pitching angle,the magnitudes are entwined with the height difference between the crest and trough that the vehicle encounters,while the directions with the stage of the crest/trough transition.