多脉冲加载下PBX装药的应力放大效应

何杨 胡秋实 仲苏洋 廖深飞 李涛 傅华

何杨, 胡秋实, 仲苏洋, 廖深飞, 李涛, 傅华. 多脉冲加载下PBX装药的应力放大效应[J]. 爆炸与冲击. doi: 10.11883/bzycj-2023-0267
引用本文: 何杨, 胡秋实, 仲苏洋, 廖深飞, 李涛, 傅华. 多脉冲加载下PBX装药的应力放大效应[J]. 爆炸与冲击. doi: 10.11883/bzycj-2023-0267
HE Yang, HU Qiushi, ZHONG Suyang, LIAO Shenfei, LI Tao, FU Hua. Stress amplification effect of PBX charge under multi-pulse loading[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0267
Citation: HE Yang, HU Qiushi, ZHONG Suyang, LIAO Shenfei, LI Tao, FU Hua. Stress amplification effect of PBX charge under multi-pulse loading[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0267

多脉冲加载下PBX装药的应力放大效应

doi: 10.11883/bzycj-2023-0267
基金项目: 中国工程物理研究院院长基金(YZJJZL2023014)
详细信息
    作者简介:

    何 杨(1996- ),女,硕士,研究实习员,heyang0820@163.com

    通讯作者:

    胡秋实(1984- ),男,博士,助理研究员,qiushihu@126.com

  • 中图分类号: O389

Stress amplification effect of PBX charge under multi-pulse loading

  • 摘要: 针对弹体侵彻过程中装药常常受到多脉冲载荷作用的问题,提出了一种装药多脉冲加载装置,研究了多脉冲加载下装药的应力放大效应。基于集中质量法建立了多脉冲加载装置的等效弹簧模型,对产生应力放大的条件进行了探讨。结果表明,多脉冲载荷频率与装药固有频率匹配时系统发生共振,装药产生响应放大,放大倍数随结构间隙宽度的增加而降低。装药多脉冲加载下存在一个时间区间,撞击加载的发生时刻落在该区间内时系统可产生放大效果。对高聚物黏结炸药 (polymer bonded explosive, PBX) 模拟材料,实现了实验室条件下应力幅值百兆帕、脉冲间隔毫秒级、脉冲次数3次且幅值逐渐放大的多脉冲载荷加载。
  • 图  1  装药多脉冲加载装置

    Figure  1.  Multi-pulse loading device for charge

    图  2  嵌套子弹截面参数

    Figure  2.  Cross-sectional parameters of nested projectile

    图  3  多脉冲加载装置等效弹簧模型

    Figure  3.  Equivalent spring model of multi-pulse loading device

    图  4  不同间隙宽度下系统幅-频响应曲线

    Figure  4.  Amplitude-frequency response curves with different gap width

    图  5  系统幅-频响应曲线峰值随阻尼、间隙的变化规律

    Figure  5.  Variation of peak value of amplitude-frequency response curves with damping coefficient and gap width

    图  6  构造的多脉冲载荷及等效弹簧系统位移响应情况

    Figure  6.  Constructed multi-pulse load and displacement response of equivalent spring system

    图  7  三脉冲载荷的傅里叶频谱

    Figure  7.  Fourier spectrum of three-pulse load

    图  8  多脉冲加载装置有限元模型

    Figure  8.  Finite element model of multi-pulse loading device

    图  9  不同∆L1下样品的应力时程曲线

    Figure  9.  Stress time history curves of samples under different ∆L1

    图  10  不同∆L1下T形传力杆的位移和中层子弹头部的应力

    Figure  10.  Displacement of T-shaped transmission bar and stress of middle projectile head under different ∆L1

    图  11  样品应力最优放大效果

    Figure  11.  Optimal amplification effect of sample stress

    图  12  T形传力杆位移和中层、外层子弹头部应力

    Figure  12.  Displacement of T-shaped transmission bar and stress in middle and outer projectile head

    图  13  多脉冲加载实验装置示意图

    Figure  13.  Schematic diagram of multi-pulse loading experimental device

    图  14  实验装置实物

    Figure  14.  Physical diagram of experimental device

    图  15  样品压力-时间历程实验结果

    Figure  15.  Experimental results of pressure-time history of samples

    图  16  子弹、限位块和T形传力杆相对位置高速摄影图片

    Figure  16.  High-speed photographic picture of the relative position of projectiles, limiting block and T-shaped transmission bar

    表  1  实验结果

    Table  1.   Experimental results

    编号 样品 规格尺寸/mm 子弹速度/(m·s−1) 放大效应
    1 聚四氟乙烯 $\varnothing $20×20 17 放大
    2 聚四氟乙烯 $\varnothing $20×20 17 放大
    3 聚四氟乙烯+PBX-3 $\varnothing $20×16+$\varnothing $20×4 17 放大
    4 聚四氟乙烯 $\varnothing $20×20 21 不放大
    5 聚四氟乙烯+PBX-3 $\varnothing $20×16+$\varnothing $20×4 21 不放大
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  • 收稿日期:  2023-08-02
  • 录用日期:  2024-04-28
  • 修回日期:  2024-02-28
  • 网络出版日期:  2024-05-09

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