多破片对柱壳装药冲击起爆速度阈值的数值模拟研究

郭淳 郭尚生 钱建平 顾文彬

郭淳, 郭尚生, 钱建平, 顾文彬. 多破片对柱壳装药冲击起爆速度阈值的数值模拟研究[J]. 爆炸与冲击, 2020, 40(6): 062301. doi: 10.11883/bzycj-2019-0391
引用本文: 郭淳, 郭尚生, 钱建平, 顾文彬. 多破片对柱壳装药冲击起爆速度阈值的数值模拟研究[J]. 爆炸与冲击, 2020, 40(6): 062301. doi: 10.11883/bzycj-2019-0391
GUO Chun, GUO Shangsheng, QIAN Jianping, GU Wenbin. Numerical simulation on shock critical initiation velocity of cylindrical covered charge by multiple fragment impacts[J]. Explosion And Shock Waves, 2020, 40(6): 062301. doi: 10.11883/bzycj-2019-0391
Citation: GUO Chun, GUO Shangsheng, QIAN Jianping, GU Wenbin. Numerical simulation on shock critical initiation velocity of cylindrical covered charge by multiple fragment impacts[J]. Explosion And Shock Waves, 2020, 40(6): 062301. doi: 10.11883/bzycj-2019-0391

多破片对柱壳装药冲击起爆速度阈值的数值模拟研究

doi: 10.11883/bzycj-2019-0391
详细信息
    作者简介:

    郭 淳(1988- ),男,博士研究生,53chun@163.com

    通讯作者:

    钱建平(1962- ),男,博士,教授,13951837475@139.com

  • 中图分类号: O389; TJ410.3

Numerical simulation on shock critical initiation velocity of cylindrical covered charge by multiple fragment impacts

  • 摘要: 为了研究实战环境中多个钨球破片对导弹战斗部(柱壳装药)的冲击起爆问题,采用AUTODYN-3D数值模拟软件,基于单破片撞击柱壳装药模型,建立多破片撞击柱壳装药的模型,开展了不同钨球个数、空间碰撞位置间隔(撞击角θ、轴向球心距l)及时间间隔对冲击起爆特性影响的数值模拟,获得了带壳B炸药的起爆速度阈值。结果表明:相同条件下,随着钨球个数的增加、空间碰撞位置间隔的减小,起爆速度阈值逐渐减小,6个钨球同时撞击的起爆速度阈值约为单个作用下的50%;双钨球作用下,柱壳装药相较于平板装药更难以起爆;双钨球间隔撞击柱壳装药时,起爆速度阈值均随着撞击时间间隔的增大而先减小后增大,最小起爆速度阈值约为同时撞击时的95%,且|θ2|<|θ1| (θ1为第1个钨球的撞击角,θ2为第2个钨球的撞击角)时更容易起爆柱壳装药。
  • 图  1  单钨球冲击柱壳装药的物理模型和有限元模型

    Figure  1.  Physical model and finite element model of single tungsten fragment impacting on cylindrical charge with steel casing

    图  2  双钨球撞击柱壳装药的简化模型

    Figure  2.  Simplified model of double tungsten fragments impacting on cylindrical charge with casing

    图  3  截面位置示意图

    Figure  3.  Schematic diagram of cross section

    图  4  起爆速度阈值随撞击角的变化曲线

    Figure  4.  Curve of critical velocity vs. impact angle θ

    图  5  多钨球撞击位置方案

    Figure  5.  Multiple tungsten sphere fragment impact options

    图  6  起爆速度阈值随钨球个数的变化

    Figure  6.  Critical velocity vs. tungsten sphere number

    图  7  起爆速度阈值随装药半径倒数的变化

    Figure  7.  Critical velocity vs. l/R

    图  8  双钨球起爆速度阈值随撞击角的变化

    Figure  8.  Critical velocity vs. impact angle θ (double tungsten sphere fragments)

    图  9  柱壳装药和平板装药起爆速度阈值随球心距的变化

    Figure  9.  Critical velocities of cylindrical and plate charge

    图  10  双钨球起爆速度阈值随轴向球心距的变化

    Figure  10.  Critical velocity vs. axial ball center distance l/r(double tungsten sphere fragments)

    图  11  4个钨球打击位置方案

    Figure  11.  Four tungsten fragments combat options

    图  12  “矩形”结构起爆速度阈值随轴向球心距的变化

    Figure  12.  Critical velocity vs. axial ball center distance l/r (rectangle)

    图  13  “菱形”结构起爆速度阈值随轴向球心距的变化

    Figure  13.  Critical velocity vs. axial ball center distance l/r (rhombus)

    图  14  l12=0时起爆速度阈值随时间间隔的变化

    Figure  14.  Critical velocity vs. time interval h2/r (l12=0)

    图  15  观测点θ2-5-2的压力时间曲线

    Figure  15.  Pressure-time curves at observation point θ2-5-2 (v=2 800 m/s)

    图  16  观测点θ2-0-2的压力时间曲线

    Figure  16.  Pressure-time curves of θ2-0-2 (v=2 800 m/s)

    图  17  起爆速度阈值随时间间隔的变化

    Figure  17.  Critical velocities vs. time interval h2/r (l12/r=2)

    表  1  B炸药材料参数

    Table  1.   Material parameters of composition B

    I/μs−1baxG1cdyG2egz
    440.2220.0144140.2220.6672.00000
    下载: 导出CSV

    表  2  破片、壳体材料模型

    Table  2.   Material model of fragment and casing

    部件材料状态方程强度模型失效模型
    破片钨合金ShockJohnson-CookGeometric strain
    壳体4340合金钢LinearJohnson-CookGeometric strain
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-10-12
  • 修回日期:  2020-03-05
  • 网络出版日期:  2020-05-25
  • 刊出日期:  2020-06-01

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