刚性柱附近浅水爆炸荷载特性研究

刘靖晗 唐廷 韦灼彬 于小存 李凌锋 张元豪

刘靖晗, 唐廷, 韦灼彬, 于小存, 李凌锋, 张元豪. 刚性柱附近浅水爆炸荷载特性研究[J]. 高压物理学报, 2019, 33(5): 055104. doi: 10.11858/gywlxb.20180704
引用本文: 刘靖晗, 唐廷, 韦灼彬, 于小存, 李凌锋, 张元豪. 刚性柱附近浅水爆炸荷载特性研究[J]. 高压物理学报, 2019, 33(5): 055104. doi: 10.11858/gywlxb.20180704
LIU Jinghan, TANG Ting, WEI Zhuobin, YU Xiaocun, LI Lingfeng, ZHANG Yuanhao. Pressure Characteristics of Shallow Water Explosion near the Rigid Column[J]. Chinese Journal of High Pressure Physics, 2019, 33(5): 055104. doi: 10.11858/gywlxb.20180704
Citation: LIU Jinghan, TANG Ting, WEI Zhuobin, YU Xiaocun, LI Lingfeng, ZHANG Yuanhao. Pressure Characteristics of Shallow Water Explosion near the Rigid Column[J]. Chinese Journal of High Pressure Physics, 2019, 33(5): 055104. doi: 10.11858/gywlxb.20180704

刚性柱附近浅水爆炸荷载特性研究

doi: 10.11858/gywlxb.20180704
基金项目: 军队后勤科研计划项目(CHJ13J006)
详细信息
    作者简介:

    刘靖晗(1992-),男,博士研究生,主要从事港口工程、防护工程研究.E-mail:1226001717@qq.com

    通讯作者:

    唐 廷(1980-),男,博士,讲师,主要从事港口工程、防护工程研究.E-mail:tangting1980@126.com

  • 中图分类号: O383

Pressure Characteristics of Shallow Water Explosion near the Rigid Column

  • 摘要: 刚性柱附近浅水爆炸时冲击波传播、气泡射流受多种因素影响。考虑水面、水底、刚性柱与水下爆炸冲击波及气泡的耦合作用,基于LS-DYNA有限元软件,建立浅水爆炸全耦合模型,通过经验公式验证有限元模型的正确性。研究表明:采用炸药直径1/3~1/2中心渐变网格能够较好地保证数值模拟精度。在冲击波传播阶段,刚性柱迎爆区冲击波峰值上升并产生切断现象,冲击波下降段被“截断”,而背爆区冲击波峰值衰减约50%,同时正压作用时间增加;在气泡脉动阶段,气泡在收缩阶段产生指向刚性柱的气泡射流,当刚性柱与炸药之间的距离约为一个气泡半径时,刚性柱附近的脉冲荷载增幅最大,脉冲荷载最大测点水深较爆心上移。

     

  • 图  有限元计算模型

    Figure  1.  FEM calculation model

    图  不同网格尺寸下的冲击波峰值压力

    Figure  2.  Shock peak pressures simulated by different mesh sizes

    图  不同网格尺寸下冲击波峰值压力偏差

    Figure  3.  Error of shock peak pressures for different mesh sizes

    图  刚性柱有限元计算模型

    Figure  4.  FEM calculation model of rigid column

    图  刚性柱附近冲击波传播过程

    Figure  5.  Propagation of shock wave near a rigid column

    图  冲击波荷载时程曲线

    Figure  6.  Time history curve of shock wave load

    图  刚性柱附近冲击波峰值压力的变化

    Figure  7.  Peak pressure of shock wave near a rigid column

    图  刚性柱附近冲击波比冲量的变化

    Figure  8.  Specific impulse of shock wave near a rigid column

    图  刚性柱附近气泡射流压力等值线

    Figure  9.  Pressure peak contour of bubble impulse near a rigid column

    表  1  有限元计算模型材料参数

    Table  1.   Material parameters of FEM calculation model

    Materialρ/(kg·m–3)C0, C1, C2, C3C4C5C6E/(J·kg–1)
    Air1.2900.40.402.5×105
    Materialρ/(kg·m–3)CS1S2S3γ
    Water100014802.56–1.9860.22680.5
    Materialρ/(kg·m–3)A/GPaB/GPaωR1R2
    TNT16303747.330.34.150.95
    Materialρ/(kg·m–3)E/MPaG/MPa
    Soil180022.48
    下载: 导出CSV

    表  2  数值模拟与经验公式比较

    Table  2.   Comparison of the numerical and theoretical results

    S/mPmaxRmT
    Theoretical results/MPaNumerical results/MPaError/%Theoretical results/mNumerical results/mError/%Theoretical results/sNumerical results/sError/%
    2135.05137.361.715.005.122.400.560.535.40
    4 61.7162.391.10
    6 39.0338.780.63
    8 28.2027.213.50
    10 21.9120.805.07
    12 16.7817.213.49
    14 14.9814.026.42
    下载: 导出CSV

    表  3  刚性柱附近冲击波荷载比较

    Table  3.   Comparison of the pressure near a rigid column

    deMeasuring areaPmaxIb
    Near rigid column/MPaNo rigid column/MPaIncrease/%Near rigid column/(kN·s·m–2)No rigid column/(kN·s·m–2)Increase/%
    0.39In front of column278.68137.36102.88111.5383.7133.23
    Behind the column34.8280.88–56.9539.7757.01–30.24
    0.98In front of column87.6446.986.8743.1636.6517.76
    Behind the column19.9538.78–48.5626.3029.28–10.18
    1.95In front of column34.7421.0864.8018.7716.5913.14
    Behind the column11.9819.02–37.0113.3615.94–16.19
    下载: 导出CSV

    表  4  刚性柱迎爆区气泡脉冲荷载比较

    Table  4.   Peak pressure of bubble impulse near a rigid column

    dePmax/MPaDepth of the maximum
    impulse/m
    Increase/%
    0.399.66615.83
    0.986.33729.45
    1.951.58 6.04
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-12-20
  • 修回日期:  2019-02-25

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