圆柱装药战斗部爆炸破片分布特性数值模拟分析  

Numerical simulation analysis of explosive fragmentation characteristics of cylinder warhead

作　　者：余林 刘祖涛 许仁多 安正松 蒋诚澄 黄威 YU Lin;LIU Zutao;XU Renduo;AN Zhengsong;JIANG Chengcheng;HUANG Wei(School of Naval Architecture and Ocean Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学船舶与海洋工程学院,湖北武汉430074

出　　处：《中国舰船研究》2024年第3期96-105,共10页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(12272147)。

摘　　要：[目的]旨在探讨圆柱体战斗部爆炸破片的分布及威力场特性。[方法]利用ANASYS/AUTODYN有限元分析软件建立圆柱装药战斗部数值的光滑粒子动力学(SPH)分析模型,基于对SPH粒子尺寸的收敛性分析,以及对MOTT破片分布模型有效性的验证分析,开展引爆方式、引爆位置、装药长径比以及装药量等关键因素对爆炸破片分布特性以及威力场特性的影响规律研究。[结果]结果显示:引爆位置和引爆方式主要对圆柱装药战斗部两端破片的速度分布有明显影响;在装药质量不变的情况下,装药长径比在点引爆条件下会对远端破片速度产生较为有限的影响,但对破片质量分布的影响比较显著;在相同装药长径比情况下,破片速度会随装药量的增加而明显增加,但是该速度增量的提升幅度会随着装药质量逐渐降低。[结论]所做研究可为战斗部设计以及舰船抗冲击防护结构设计提供重要参考。[Objective]The aim of this paper is to explore the distribution and power field characteristics of the explosive fragmentation of cylindrical warheads.[Method]The smoothed particle hydrodynamics(SPH)in ANSYS/AUTODYN are employed to establish a numerical model of cylindrical charge warheads.Based on the convergence analysis of SPH particle size,the MOTT fragment distribution model is used to val-idate the numerical model.A systematic analysis of the distribution and power field characteristics of frag-ments is then conducted by considering the detonation mode,detonation position,charge aspect ratio and charge mass.[Results]The results show that the detonation position and method significantly affect the ve-locity distribution of fragments at both ends of the cylindrical charge warhead.With an unchanged charge mass,the charge aspect ratio is confirmed to have limited influence on fragment velocity,but a more signific-ant impact on the mass distribution of fragments.Under the same charge aspect ratio,the fragment velocity in-creases with the increase in charge mass.However,the increase in velocity gradually decreases with the in-crease in charge.[Conclusion]The results of this study can provide important references for the design of warheads and the anti-strike protection structures of naval ships.

关 键 词：爆炸力学 战斗部 破片分布 破片速度 数值模拟 

分 类 号：U661.4[交通运输工程—船舶及航道工程]