Numerical Analysis and Experimental Study of a Underwater-launched Projectile Breaking Through Ice Vertically

Zhenting DIAO; Dengjian FANG; Shaolei WANG

doi:10.12382/bgxb.2024.0885

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Numerical Analysis and Experimental Study of a Underwater-launched Projectile Breaking Through Ice Vertically

更新时间：2025-09-05

- Numerical Analysis and Experimental Study of a Underwater-launched Projectile Breaking Through Ice Vertically
- Acta Armamentarii Vol. 46, Issue 5, Pages: 240885(2025)
- 作者机构：
  
  海军工程大学, 湖北武汉 430033
- 作者简介：
- 基金信息：
- DOI：10.12382/bgxb.2024.0885
  CLC：
- Received：24 September 2024，
  
  Published Online：07 May 2025，
  
  Published：31 May 2025
- 稿件说明：
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Zhenting DIAO, Dengjian FANG, Shaolei WANG. Numerical Analysis and Experimental Study of a Underwater-launched Projectile Breaking Through Ice Vertically[J]. Acta Armamentarii, 2025, 46(5): 240885.
DOI：

Zhenting DIAO, Dengjian FANG, Shaolei WANG. Numerical Analysis and Experimental Study of a Underwater-launched Projectile Breaking Through Ice Vertically[J]. Acta Armamentarii, 2025, 46(5): 240885. DOI： 10.12382/bgxb.2024.0885.

摘要

针对航行体与冰相互作用的强非线性问题

通过相似理论推导出影响航行体破冰的关键无量纲参数

进行航行体高速贯穿冰层的缩比模型试验。基于高斯拟合函数提出一个冰载荷预测公式;建立航行体破冰出水的流固耦合模型

通过改变航行体的头部形状、航行体撞击冰层的动能和冰层厚度

对破冰现象、冰载荷以及航行体运动特性进行分析。研究结果表明:在破冰过程中

航行体头部空泡的体积不断减小

肩部空泡的体积逐渐增大

空化效应越来越剧烈。当航行体初始速度为40m/s时

半球型、球锥型、尖锥型航行体的冰载荷极值分别为35700kN、33200kN、18600kN

尖锥型头部航行体破冰前后速度损失率最低

破冰效果最好;在冰层厚度为180mm、弹射压力分别为3MPa和5MPa的条件下

航行体破冰后速度分别由13.1m/s、17.8m/s降低至9.5m/s、13.4m/s;航行体破冰速度越大

速度损失率越低

动能损失越大;冰载荷极值和航行体速度损失率随着冰层厚度的增加而上升

航行体初速度对载荷特性和运动特性的影响效果随着冰层厚度的减小而弱化。

Abstract

Aiming at the strong nonlinear problem of the interaction between underwater-launched projectile and ice

the key dimensionless parameters affecting the ice-breaking of projectile are derived by similarity theory. The scaled model test is carried out for the high-speed penetration of projectile through the ice layer. Based on the Gaussian fitting function

an ice load prediction formula is proposed. A fluid-solid coupling model of ice-breaking is established. The ice-breaking phenomenon

the ice load and the motion characteristics of projectile are analyzed by changing the nose shape of projectile

the kinetic energy of projectile and the thickness of ice layer. The results show that the volume of projectile nose cavitation decreases during ice-breaking

the volume of shoulder cavitation gradually increases

and the asymmetry of shoulder cavitation increases with the increase in ice thickness. When the initial speed of projectile is 40m/s

the extreme values of the ice loads on projectiles with hemispherical

spherical conical and pointed conical noses are 35700kN

33200kN and 18600kN

respectively. The speed loss rate of projectile with pointed conical nose is the lowest

and its ice breaking effect is the best. Under the condition that the ice thickness is 180mm and the ejection pressure is 3MPa and 5MPa

respectively

the speeds of projectile after icebreaking are reduced from 13.1m/s and 17.8m/s to 9.5m/s and 13.4m/s. The greater the ice-breaking speed of projectile is

the lower the speed loss rate is

and the greater the kinetic energy loss is.The extreme value of ice load and the speed loss rate of projectile increase with the increase in ice thickness

and the effect of the initial speed of projectile on the load characteristics and motion characteristics weakens with the decrease in ice thickness.

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