主体结构荷载可控的新型组合式防护结构(I):抗爆机制

方秦 高矗 孔祥振 杨亚

方秦, 高矗, 孔祥振, 杨亚. 主体结构荷载可控的新型组合式防护结构(I):抗爆机制[J]. 爆炸与冲击. doi: 10.11883/bzycj-2023-0459
引用本文: 方秦, 高矗, 孔祥振, 杨亚. 主体结构荷载可控的新型组合式防护结构(I):抗爆机制[J]. 爆炸与冲击. doi: 10.11883/bzycj-2023-0459
FANG Qin, GAO Chu, KONG Xiangzhen, YANG Ya. A new composite protective structure based on controllability of blast load on structure layer (I): blast resistance mechanism[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0459
Citation: FANG Qin, GAO Chu, KONG Xiangzhen, YANG Ya. A new composite protective structure based on controllability of blast load on structure layer (I): blast resistance mechanism[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0459

主体结构荷载可控的新型组合式防护结构(I):抗爆机制

doi: 10.11883/bzycj-2023-0459
基金项目: 国家自然科学基金(52178515)
详细信息
    作者简介:

    方 秦(1962- ) ,男,教授,fangqinjs@139.com

    通讯作者:

    孔祥振(1988- ),男,副教授,ouckxz@163.com

  • 中图分类号: O382

A new composite protective structure based on controllability of blast load on structure layer (I): blast resistance mechanism

  • 摘要: 针对以中粗砂为分配层的传统成层式结构难以可靠控制作用于主体结构上荷载的缺陷,以及以泡沫混凝土为夹层的组合式防护结构抗爆机制不明等问题,开展了组合式防护结构预制孔装药爆炸试验,测得了特定位置处的爆炸波时程曲线和结构损伤破坏情况。然后基于Kong-Fang混凝土材料模型和LS-DYNA中的光滑粒子伽辽金(SPG)算法,开展了爆炸波在组合式防护结构中传播衰减规律和损伤破坏的数值模拟研究。试验和数值模拟结果表明:组合式防护结构的抗爆机制在于遮弹层和泡沫混凝土层之间的强波阻抗失配关系,通过“调控”爆炸能量的分配,使得爆炸能量大部分耗散在遮弹层中,大幅减少经泡沫混凝土层到达主体结构上的荷载和能量。研究结果可为抗新型钻地弹的防护设计提供重要参考。
  • 图  1  成层式结构示意图

    Figure  1.  Schematic diagram of layered protective structure

    图  2  组合式防护结构预制孔装药爆炸试验示意图

    Figure  2.  Schematic diagram of blast test on composite protective structure

    图  3  PVDF应力传感器的埋置

    Figure  3.  Locations of PVDF transducers

    图  4  试验后组合式防护结构靶体破坏情况

    Figure  4.  Post-test failure in composite protective structure

    图  5  试验测得的应力时程曲线及与数值模拟结果的对比

    Figure  5.  Comparisons of stress-time histories between test data and numerical prediction

    图  6  组合式防护结构预制孔装药爆炸数值模型

    Figure  6.  Numerical model of blast test on composite protective structure

    图  7  典型泡沫混凝土应力应变曲线

    Figure  7.  Stress-strain curves of typical foam concrete

    图  8  不同网格尺寸预测得到的应力时程曲线

    Figure  8.  Stress-time histories predicted by different mesh sizes

    图  9  不同网格尺寸预测得到的CF120混凝土遮弹层损伤破坏云图

    Figure  9.  Numerically predicted damage in CF120 concrete bursting layer by different mesh sizes

    图  10  CF120混凝土遮弹层损伤云图

    Figure  10.  Numerically predicted damage in CF120 concrete bursting layer

    图  11  组合式防护结构数值模型及测点布置示意图

    Figure  11.  Numerical model of composite protective structure subjected to explosion and locations of the gauges

    图  12  结构I遮弹层损伤云图

    Figure  12.  Numerically predicted damage in CF120 concrete bursting layer of Structure I

    图  13  结构II遮弹层损伤云图

    Figure  13.  Numerically predicted damage in CF120 concrete bursting layer of Structure II

    图  14  两种组合式结构(结构I和结构II)中主体结构层的损伤云图

    Figure  14.  Numerically predicted damage in the structure layers of Structure I and Structure II

    图  15  两种组合式结构(结构I和结构II)中主体结构层测点应力时程曲线

    Figure  15.  Stress-time histories of gauges in structural layers of Structure I and Structure II

    图  16  两种组合式结构(结构I和结构II)中各层能量对比

    Figure  16.  Comparison of blast energy distribution in each layer of Structure I and Structure II

    图  17  两种组合式结构(结构I和结构II)界面A处测点应力时程曲线

    Figure  17.  Stress-time histories of three gauges at Interface A in Structure I and Structure II

    图  18  0.5 m厚C5泡沫混凝土层沿中心轴线方向的爆炸波应力、应变峰值分布情况

    Figure  18.  Peak stress and peak strain along the central axis of C5 foam concrete layer with a thickness of 0.5 m

    图  19  两种组合式结构(结构I和结构II)界面B处测点应力时程曲线

    Figure  19.  Stress-time histories of three gauges at Interface B in Structure I and Structure II

    表  1  CF120超高性能混凝土配合比(单位:kg/m3

    Table  1.   Mix proportion of CF120 ultra-high performance concrete (Unit: kg/m3)

    高强
    水泥
    活性
    粉末
    石子 钢纤维 减水剂
    5 mm~10 mm 10 mm~16 mm
    523 230 623 407 611 25 122 21
    下载: 导出CSV

    表  2  泡沫混凝土配合比

    Table  2.   Mix proportion of foam concrete

    强度等级 设计密度(kg/m3 粉煤灰(kg/m3 矿渣(kg/m3 硅酸钠溶液(kg/m3 氢氧化钠固体(kg/m3 水(kg/m3 泡沫(L/m3
    C1 500 202 202 188 14 72 600
    C3 900 362 362 339 25 133 406
    C5 1200 484 484 452 33 182 108
    C10 1400 564 564 528 38 213 65
    下载: 导出CSV
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  • 收稿日期:  2023-12-23
  • 修回日期:  2024-03-08
  • 网络出版日期:  2024-03-12

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