水下爆炸下有限尺度平板的载荷特性及结构响应试验研究

刘丽滨 李海涛 刁爱民 王晓强

刘丽滨, 李海涛, 刁爱民, 王晓强. 水下爆炸下有限尺度平板的载荷特性及结构响应试验研究[J]. 高压物理学报, 2018, 32(5): 055101. doi: 10.11858/gywlxb.20180516
引用本文: 刘丽滨, 李海涛, 刁爱民, 王晓强. 水下爆炸下有限尺度平板的载荷特性及结构响应试验研究[J]. 高压物理学报, 2018, 32(5): 055101. doi: 10.11858/gywlxb.20180516
LIU Libin, LI Haitao, DIAO Aimin, WANG Xiaoqiang. Experimental Investigation on Load Characteristics and Structure Response of Finite-Size Plate Subjected to Underwater Explosions[J]. Chinese Journal of High Pressure Physics, 2018, 32(5): 055101. doi: 10.11858/gywlxb.20180516
Citation: LIU Libin, LI Haitao, DIAO Aimin, WANG Xiaoqiang. Experimental Investigation on Load Characteristics and Structure Response of Finite-Size Plate Subjected to Underwater Explosions[J]. Chinese Journal of High Pressure Physics, 2018, 32(5): 055101. doi: 10.11858/gywlxb.20180516

水下爆炸下有限尺度平板的载荷特性及结构响应试验研究

doi: 10.11858/gywlxb.20180516
基金项目: 

国家自然科学基金 51679244

详细信息
    作者简介:

    刘丽滨(1993-), 男, 硕士研究生, 主要从事舰船结构抗爆抗冲击研究.E-mail:hit_llbin@163.com

    通讯作者:

    李海涛(1979-), 男, 博士, 副教授, 主要从事舰船结构抗爆抗冲击研究.E-mail:navy_lht@163.com

  • 中图分类号: O383.1

Experimental Investigation on Load Characteristics and Structure Response of Finite-Size Plate Subjected to Underwater Explosions

  • 摘要: 为研究近结构边界下水下爆炸冲击波和气泡载荷特性,设计几种典型尺寸的平板模型,通过调整爆径比、平板厚度等参数,试验研究了水下非接触爆炸下的气泡脉动过程,分析平板边界处的低压流场特性,并基于应变分析获得了平板结构的局部及整体响应特征。研究发现:在近平板爆炸气泡的运动过程中,平板边界处会出现低压(负压)流场,低压维持时间约占气泡脉动周期的60%~80%,最大负压值可达0.1 MPa;随着爆径比的减小,平板的最终变形由弹性变形、中垂变形向中拱变形转变。

     

  • 图  模型结构和尺寸(单位:mm)

    Figure  1.  Model's structure and dimension (Unit:mm)

    图  模型实物

    Figure  2.  Photograph of actual model

    图  试验布局示意

    Figure  3.  Illustration of test layout

    图  工况2下自由场压力历程

    Figure  4.  Pressure history of free field in Case 2

    图  工况2下水下爆炸过程

    Figure  5.  Underwater explosion process in Case 2

    图  工况4下水下爆炸过程

    Figure  6.  Underwater explosion process in Case 4

    图  典型工况下平板最终塑性变形

    Figure  7.  Final plastic deformations of plates in typical cases

    图  工况2下测点S3的应变时程曲线

    Figure  8.  Strain history at point S3 in Case 2

    图  工况4下测点P2的压力曲线

    Figure  9.  Pressure history at point P2 in Case 4

    图  10  工况2下测点P2的压力曲线

    Figure  10.  Pressure history at point P2 in Case 2

    表  1  试验工况

    Table  1.   Test cases

    Case Model h/m w/g R/rmax Tb/ms
    1 M3 1.0 18 2.46 69.82
    2 M3 0.8 18 1.96 70.34
    3 M6 0.6 18 1.46 71.40
    4 M3 0.4 18 0.97 72.51
    5 M6 1.0 10 2.99 56.98
    6 M6 1.0 5 3.77 45.23
    下载: 导出CSV

    表  2  不同工况下冲击波和气泡脉动的压力峰值

    Table  2.   Peak pressures of shock wave and bubble pulsation in test cases

    Case R/rmax pw/MPa pb1/MPa pb2/MPa $\frac{{{p_{{\rm{b1}}}}}}{{{p_{\rm{w}}}}}/\% $
    1 2.46
    2 1.96 6.963 1.274 0.416 18.30
    3 1.46 8.804 1.097 0.522 12.46
    4 0.97 6.932 0.637 9.18
    5 2.99 5.464 0.950 0.406 17.38
    6 3.77 4.610 0.762 0.218 16.53
    下载: 导出CSV

    表  3  不同工况下平板在各个阶段的应变峰值

    Table  3.   Peak strains at each stage of plate in different cases

    Case R/rmax Peak strain/(10-3)
    Hogging phase Sagging phase Stabilization phase
    S1 S2 S3 S4 S1 S2 S3 S4 S1 S2 S3 S4
    1 2.46 0.577 0.684 0.306 0.366 -0.212 -0.470 -0.267 -0.334 -0.090 -0.014 -0.026 -0.011
    2 1.96 0.780 0.606 0.388 0.305 -0.385 -0.503 -0.371 -0.321 0.011 0.023 -0.031 -0.050
    4 0.97 0.533 -0.148 -0.171 -0.008 -0.111 -0.539 -0.600 0.407 0.055 -0.403 -0.452
    5 2.99 0.543 0.535 0.269 0.345 -0.472 -0.492 -0.746 -0.939 0 0 0 0
    6 3.77 0.613 0.553 0.097 0.097 -0.338 -0.240 -0.177 -0.233 0 0 0 0
    下载: 导出CSV

    表  4  工况2和工况4的压力对比

    Table  4.   Comparison of pressures in Case 2 and Case 4

    Case First pulsation Second pulsation
    tp1/ms tn1/ms pn1/MPa tp2/ms tn2/ms pn2/MPa
    2 13.90 51.45 -0.067 5.33 40.95 -0.095
    4 4.40 55.05 -0.184 5.60 52.77 -0.142
    下载: 导出CSV

    表  5  R/rmax对气泡脉动周期的影响

    Table  5.   Effect of R/rmax on the period of bubble pulsation

    Case R/rmax Bubble pulsation period
    Test/ms Theor./ms Error/%
    1 2.46 69.82
    2 1.96 67.10 70.34 4.6
    3 1.46 67.17 71.40 5.9
    4 0.97 66.32 72.51 8.5
    5 2.99 53.34 56.98 6.4
    6 3.77 42.22 45.23 6.7
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-02-09
  • 修回日期:  2018-04-10

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