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泡沫覆盖层对水下爆炸气泡射流防护机理缩比试验研究

杜志鹏 张磊 谌勇 华宏星

杜志鹏,张磊,谌勇,华宏星. 泡沫覆盖层对水下爆炸气泡射流防护机理缩比试验研究 [J]. 应用数学和力学,2022,43(5):569-576 doi: 10.21656/1000-0887.420367
引用本文: 杜志鹏,张磊,谌勇,华宏星. 泡沫覆盖层对水下爆炸气泡射流防护机理缩比试验研究 [J]. 应用数学和力学,2022,43(5):569-576 doi: 10.21656/1000-0887.420367
DU Zhipeng, ZHANG Lei, CHEN Yong, HUA Hongxing. Reduced-Scale Experiment Study on the Protective Mechanism of Foam Coating Against Underwater Explosion Bubble Jet[J]. Applied Mathematics and Mechanics, 2022, 43(5): 569-576. doi: 10.21656/1000-0887.420367
Citation: DU Zhipeng, ZHANG Lei, CHEN Yong, HUA Hongxing. Reduced-Scale Experiment Study on the Protective Mechanism of Foam Coating Against Underwater Explosion Bubble Jet[J]. Applied Mathematics and Mechanics, 2022, 43(5): 569-576. doi: 10.21656/1000-0887.420367

泡沫覆盖层对水下爆炸气泡射流防护机理缩比试验研究

doi: 10.21656/1000-0887.420367
详细信息
    作者简介:

    杜志鹏(1977—),男,博士,高级工程师(通讯作者. E-mail:duzp7755@163.com

  • 中图分类号: O347.1

Reduced-Scale Experiment Study on the Protective Mechanism of Foam Coating Against Underwater Explosion Bubble Jet

  • 摘要:

    水下爆炸会对水中结构物造成严重威胁。柔性覆盖层或夹层板能够降低水中结构物水下爆炸冲击响应,因此成为研究的热点。以往的研究多集中于覆盖层对冲击波的防护机理,适用于较远距离的水下爆炸情况。近距离水下爆炸除了冲击波外,爆炸气泡溃灭时产生的朝向结构物的高速水射流更为致命。该文针对这种情况,基于量纲原理,推导缩比相似关系,通过缩比模型水下爆炸试验发现了覆盖层表面空化微气泡群对爆炸气泡形成高速水射流过程产生干扰,提出了泡沫覆盖层钢板水下爆炸气泡射流防护机理。

  • 图  1  结构物敷设覆盖层水下爆炸试验

    Figure  1.  The underwater explosion test of coating structure

    图  2  有、无覆盖层表面冲击波压力对比

    Figure  2.  Comparison of surface shock wave pressure with or without coating

    图  3  试验布置示意图

    Figure  3.  Schematic diagram of test layout

    图  4  泡沫覆盖层横截面示意图

    Figure  4.  The cross section of foam coating section

    图  5  泡沫覆盖圆钢板与光面圆钢板照片

    Figure  5.  The foam coating round steel plate and the smooth round steel plate photograph

    图  6  未敷设泡沫覆盖层钢板爆炸试验高速摄像

    Figure  6.  High-speed video for the explosion test of the steel sheet without foam coating

    图  7  敷设泡沫覆盖层钢板爆炸试验高速摄像

    Figure  7.  High-speed video for the explosive test of the steel sheet with foam coating

    图  8  敷设泡沫覆盖层的钢板与未敷设的钢板变形

    Figure  8.  The steel plate deformation with foam coating and without coating

    图  9  泡沫覆盖层对气泡射流防护机理示意图

    Figure  9.  Schematic diagram of the bubble protection mechanism for foam coating

    表  1  水下爆炸气泡迁移相似参数

    Table  1.   Similar parameters of bubble migration in underwater explosion

    parameterprototypegeometric similarity modelgravity similarity model
    maximum bubble radius$ {R^{\max }} $$ \lambda _\ell {R^{\max }} $$ \lambda _\ell {R^{\max }} $
    bubble pulse period$ T $$ {\lambda _\ell }T $$ \lambda _l^{1/2}T $
    bubble pulse peak pressure$ P_1^{\max } $$ P_1^{\max } $$ \lambda _l P_1^{\max } $
    static pressure of bubble in water${D + {D_0} }$${D + {D_0} }$$ {\lambda _\ell }\left( {D + {D_0}} \right) $
    下载: 导出CSV

    表  2  泡沫覆盖层模型相似参数

    Table  2.   Similarity parameters of the foam coating model

    parameterprototypesimilarity model
    thickness$ h $$\lambda_\ell h $
    density$ \rho $$\rho{ {\lambda _E}/{\lambda _l} }$
    rigidity$ k $$ {\lambda _l}{\lambda _E} $$ k $
    energy absorption rate$ \dfrac{W}{{{\sigma _s}h{L^2}}} $$ \dfrac{W}{{{\sigma _s}h{L^2}}} $
    下载: 导出CSV

    表  3  按不同缩比相似推导原型参数

    Table  3.   Derivations of prototype parameters according to different scale similarities

    parametersimilarity modelgeometric similarity modelgravity similarity model
    equivalent of detonation source2.25 g TNT35 kg TNT5 kg TNT
    explosion source water depth H/m1125
    maximum bubble radius $ {R^{\max }} $/m0.251.8
    bubble pulsation period T/ms37925185
    foam coating thickness h/mm20500500
    foam coating layer density $ \rho $/(kg/m3)0.10.10.4
    下载: 导出CSV

    表  4  有无覆盖层圆板的射流防护参数计算表

    Table  4.   Calculation of jet protection parameters of circular plates with or without coating

    statusparameter
    modulus of elasticity
    E/Pa
    plate thickness
    $h$/m
    bubble pulsation pressure
    ${P_{\rm{b}}}$/Pa
    maximum bubble radius
    $ {R^{\max }} $/m
    blasting distance
    R/m
    cavitation parameters
    $\mu $
    distance parameter
    $\eta $
    foam coated circular plate1 × 1060.0223.12 × 1070.20.20.00351
    circular plate2 × 10110.00453.12 × 1070.20.21441
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-11-29
  • 修回日期:  2022-04-21
  • 网络出版日期:  2022-05-09
  • 刊出日期:  2022-05-15

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