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水介质初始参数设置对水下爆炸载荷的影响

郑永辉 魏继锋

郑永辉, 魏继锋. 水介质初始参数设置对水下爆炸载荷的影响[J]. 爆炸与冲击, 2022, 42(5): 053202. doi: 10.11883/bzycj-2021-0485
引用本文: 郑永辉, 魏继锋. 水介质初始参数设置对水下爆炸载荷的影响[J]. 爆炸与冲击, 2022, 42(5): 053202. doi: 10.11883/bzycj-2021-0485
ZHENG Yonghui, WEI Jifeng. Effect of initial parameter setting of water on load characteristics of underwater explosion[J]. Explosion And Shock Waves, 2022, 42(5): 053202. doi: 10.11883/bzycj-2021-0485
Citation: ZHENG Yonghui, WEI Jifeng. Effect of initial parameter setting of water on load characteristics of underwater explosion[J]. Explosion And Shock Waves, 2022, 42(5): 053202. doi: 10.11883/bzycj-2021-0485

水介质初始参数设置对水下爆炸载荷的影响

doi: 10.11883/bzycj-2021-0485
基金项目: 国防科研基金(1020904)
详细信息
    作者简介:

    郑永辉(1996- ),男,硕士研究生,3038169560@qq.com

    通讯作者:

    魏继锋(1977- ),男,博士,副教授,weijifeng@bit.edu.cn

  • 中图分类号: O389;TJ02

Effect of initial parameter setting of water on load characteristics of underwater explosion

  • 摘要: 针对数值计算中水介质初始参数设置对水下爆炸载荷特性的影响开展了深入分析。基于参考状态参数确定了水介质状态方程形式;从热力学角度分析了常用的两种初始参数设置方式,提出了一种按等温假设设置初始参数的方式,并对LS-DYNA中INITIAL_EOS_ALE关键字给出的参数设置结果进行了分析;采用LS-DYNA程序进行一维球形装药水下爆炸数值计算,分析了3种设置方式下爆炸载荷特性的差异,并与已有研究成果进行了对比。结果表明:当仅改变水介质内能项时,参数按等容过程变化,流场压力源于外界传热,与实际深水环境严重不符;INITIAL_EOS_ALE关键字给出的参数设置结果与仅改变水介质密度(等内能过程)接近,水温变化规律与真实环境不符;按等内能过程和等温过程设置初始参数时,水下爆炸载荷特性计算结果基本相同,与已有成果吻合;综合分析认为,按等温形式进行初始参数设置方式较优。研究成果可为水下爆炸尤其是深水爆炸数值仿真提供参考。
  • 图  1  不同设置方式下的μeV和ΔT

    Figure  1.  Values of μ, eV and ΔT in different setting modes

    图  2  不同设置方式下的声速变化

    Figure  2.  Acoustic velocity in different modes

    图  3  H=5 km及R=55R0时3种方式下的冲击波压力-时间曲线

    Figure  3.  Shock wave pressure-time curves in three modes when H=5 km and R=55R0

    图  4  R=55R0时不同水深下3种方式所对应的冲击波载荷参数

    Figure  4.  Values of shock wave load in three modes when R=55R0

    图  5  H=5 km时3种方式下气泡的半径-时间曲线

    Figure  5.  Bubble radius-time curves in three modes when H=5 km

    图  6  Vanzant等[19]的试验结果及线性拟合曲线

    Figure  6.  Test results from Vanzant et al[19] and linear fitting results

    图  7  ΔPm在5 km水深处相对于在0 m处的变化幅度

    Figure  7.  Changing amplitudes of ΔPm when depth changes from 0 m to 5 km

    图  8  H=5 km时ΔPm相对于计算式(8)的误差

    Figure  8.  Relative errors of ΔPm between simulation results and calculation formulas when H=5 km

    图  9  气泡脉动参数相对于经验值的误差

    Figure  9.  Relative errors of Rmax and T between simulation and empirical formula

    表  1  水介质状态方程参数

    Table  1.   EOS parameters of water

    C0/PaC1/GPaC2/GPaC3/GPaC4C5C6
    1013252.29.5414.570.280.280
    下载: 导出CSV

    表  2  $H=5\;{\rm {km}} $$R=55R_0 $时3种方式下的$t_{\rm a} $$\Delta P_{\rm m} $$t_{\rm c} $

    Table  2.   Values of $t_{\rm a} $, $\Delta P_{\rm m} $ and $t_{\rm c} $ in three modes when $H=5\;{\rm {km}} $ and $R=55R_0 $

    方式ta/msΔPm/MPatc/ms
    1.774512.0800.2676
    1.657813.6030.2587
    1.651813.6920.2581
    下载: 导出CSV

    表  3  冲击波载荷在5 km水深处相对于0 m的变化幅度

    Table  3.   Changing amplitudes of shock wave load when depth changes from 0 m to 5 km

    方式变化幅度/%
    ΔPmIes
    −1.202−74.304−32.896
    11.255−73.227−21.877
    11.981−73.171−21.247
    下载: 导出CSV

    表  4  $H=5\;{\rm{km}} $时3种方式下对应的$R_{\max} $$T $

    Table  4.   Values of $R_{\max} $ and $T $ in three modes when $H=5\;{\rm{km}} $

    方式Rmax/mmT/ms
    178.7221.7129
    180.6181.7445
    180.7311.7460
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-11-18
  • 修回日期:  2021-12-25
  • 网络出版日期:  2022-04-25
  • 刊出日期:  2022-05-27

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