水声对抗子弹入水冲击响应仿真

邦志辉; 刘荣忠; 郭 锐; 张 俊

doi:10.11993/j.issn.1673-1948.2013.05.002

水声对抗子弹入水冲击响应仿真

doi: 10.11993/j.issn.1673-1948.2013.05.002

南京理工大学智能弹药技术国防重点学科实验室, 江苏南京, 210094

基金项目: 国家自然科学基金——青年科学项目(1102088)

详细信息

作者简介:
邦志辉(1986-), 男, 在读硕士, 研究方向为水声对抗子母弹结构设计及强度可靠性分析.

中图分类号: TJ415.6; O353.4
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- 被引次数: 0
出版历程
- 收稿日期: 2013-05-07
- 修回日期: 2013-06-16
- 刊出日期: 2013-10-20

Simulation on Impact Response to Water Entry of Underwater Acoustic Countermeasure Bullets

Ministerial Key Laboratory of ZhiNengDanYao, Nanjing University of Science & Technology, Nanjing 210094, China

摘要

摘要: 水声对抗子弹的入水冲击对其可靠性具有较大影响。采用任意拉格朗日-欧拉(ALE)算法建立了子弹入水冲击动力学仿真模型, 利用球形子弹入水的试验结果验证了仿真的可行性, 进而在不同情况下对子弹入水进行仿真, 并分析了由冲击所引起的空泡现象、运动规律及壳体冲击响应。仿真结果表明, 子弹外形对空泡现象影响较显著; 在子弹入水初期的速度表现出很强的衰减特性; 随着入水角度的增大, 子弹入水稳定性增强, 但轴向冲击阻力增大; 塑料壳体较铝合金壳体对子弹入水冲击的缓冲作用大。
- 水声对抗子弹 /
- 入水 /
- ALE算法 /
- 空泡 /
- 冲击响应
Abstract: The water entry impact of underwater acoustic countermeasure bullets has a significant influence on the reli-ability of the bullet. A dynamic simulation model of water entry impact is established by arbitrary Lagrange-Euler(ALE) algorithm. The feasibility of the simulation is verified by an experiment of a spherical bullet entering into water. Fur-thermore, numerical simulations of water entry impact of underwater acoustic countermeasure bullets are conducted in different conditions to analyze the cavitation, the bullet motion and the shock response of shell, which are caused by the water entry impact of the bullet. The results show that the cavitation is significantly influenced by the shape of bullets; the bullet speed exhibits high attenuation characteristic at the early stage of water entry; with the water entry angle in-creasing, the stability of bullet entering into water enhances, but the axial impact resistance gets larger; compared to the aluminum shell, buffering effect of the plastic shell on the water entry impact of the bullet is larger.
- underwater acoustic countermeasure bullet /
- water entry /
- ALE algorithm /
- cavitation /
- impact response

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参考文献(12)

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