基于简易冲击分解模型的爆轰驱动硅橡胶数值模拟及实验解读

刘军 殷建伟 张凤国

刘军, 殷建伟, 张凤国. 基于简易冲击分解模型的爆轰驱动硅橡胶数值模拟及实验解读[J]. 爆炸与冲击. doi: 10.11883/bzycj-2024-0070
引用本文: 刘军, 殷建伟, 张凤国. 基于简易冲击分解模型的爆轰驱动硅橡胶数值模拟及实验解读[J]. 爆炸与冲击. doi: 10.11883/bzycj-2024-0070
LIU Jun, YIN Jianwei, ZHANG Fengguo. Numerical simulation and experimental interpretation of detonation driven silicone rubber based on simple shock decomposition model[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0070
Citation: LIU Jun, YIN Jianwei, ZHANG Fengguo. Numerical simulation and experimental interpretation of detonation driven silicone rubber based on simple shock decomposition model[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0070

基于简易冲击分解模型的爆轰驱动硅橡胶数值模拟及实验解读

doi: 10.11883/bzycj-2024-0070
基金项目: 国家自然科学基金(12101062,12271054)
详细信息
    作者简介:

    刘 军(1981- ),男,硕士,研究员,caepcfd@126.com

  • 中图分类号: O368

Numerical simulation and experimental interpretation of detonation driven silicone rubber based on simple shock decomposition model

  • 摘要: 为了反映爆轰驱动下硅橡胶发生冲击分解反应的物理过程,提出了一种简易的硅橡胶冲击分解模型。基于该模型,对爆轰驱动含硅橡胶夹层钢板实验进行了模拟,并分析解读了钢板的自由面速度。结果表明,实验中硅橡胶发生了冲击分解反应,导致钢板的自由面速度曲线出现了首次起跳中间速度平台及首次起跳速度峰值降低的现象。受硅橡胶冲击分解影响,首次入射波压力将在临界冲击分解压力附近弛豫一段时间,再继续升高至最高压力。该压力波作用于钢板的自由面后,出现了自由面速度在中间速度平台停留一段时间,之后继续升高至速度峰值的现象。硅橡胶冲击分解后的气相物质可压缩性较高,首次加载波内较多的能量被用于压缩气体做功,导致首次波传播至自由面时能量衰减、峰值压力降低,首次起跳速度峰值降低。
  • 图  1  爆轰驱动双层钢板实验的二维平面示意图[22]

    Figure  1.  Schematic diagram of the detonation-driven steel plates experiment [22]

    图  2  爆轰驱动双层钢板实验的简化计算模型和局部网格划分情况

    Figure  2.  Simplified calculation model of experimental setup with the details of mesh division

    图  3  起爆后不同时刻模拟的钢板密度分布

    Figure  3.  Simulated density distributions of steel at different times after initiation

    图  4  $ {\varnothing } $30 mm位置上S3和S4的自由面速度

    Figure  4.  Free surface velocity of S4, S3 at $ {\varnothing } $30 mm

    图  5  硅橡胶泡沫1/2厚度处的压力、密度和内能

    Figure  5.  Simulated pressure, density and internal energy in the middle position of silicone rubber foam

    图  6  考虑冲击分解后硅橡胶一侧测点S3处的自由面速度

    Figure  6.  Free surface velocity of S3 on silicone side with shock decomposition

    图  7  硅橡胶泡沫1/2厚度处的压力和内能时程曲线

    Figure  7.  Time histories of simulated pressure and internal energy in the middle position of silicone rubber

    表  1  45钢的计算参数[26-28]

    Table  1.   Calculation parameters of 45 steel[26-28]

    ρ0[26]/(g·cm−3) c0[26]/(km·s−1) S1[26] S2 S3 γ0[26] λ[26] G0[27-28]/GPa Y0[27-28]/GPa Tm0[26]/K α0 αs/GPa η/(Pa·s) Dcut
    7.85 4.57 1.49 0 0 2.17 0.43 81.8 0.355 2380 1.0001 0.3 10 0.10
    下载: 导出CSV

    表  2  硅橡胶(泡沫)的计算参数[7,11]

    Table  2.   Calculation parameters of silicone rubber (foam) [7,11]

    ρ0[7]/(g·cm−3) c0[7]/(km1·s−1) S1[7] S2 S3 γ0[7] λ ρ00[11]/(g·cm−3)
    1.04 1.63 1.66 0 0 1.5 0 0.92
    下载: 导出CSV

    表  3  RHT-901炸药的计算参数[31-32]

    Table  3.   Calculation parameters of RHT-901[31-32]

    ρ0[31]/(g·cm−3) PCJ[31]/GPa DCJ[31]/(km·s−1) A/GPa B/GPa R1 R2 ω E[32]/(kJ·cm−3)
    1.7 28.0 7.8 737.4 16.94 4.8 0.58 0.34 8.5
    下载: 导出CSV
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  • 收稿日期:  2024-03-11
  • 修回日期:  2024-06-14
  • 网络出版日期:  2024-06-17

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