负压爆炸载荷作用下固支钢板变形研究

杨锐 汪泉 谢守冬 李瑞 涂唱畅 徐小猛 李孝臣

杨锐, 汪泉, 谢守冬, 李瑞, 涂唱畅, 徐小猛, 李孝臣. 负压爆炸载荷作用下固支钢板变形研究[J]. 高压物理学报, 2023, 37(5): 054102. doi: 10.11858/gywlxb.20230685
引用本文: 杨锐, 汪泉, 谢守冬, 李瑞, 涂唱畅, 徐小猛, 李孝臣. 负压爆炸载荷作用下固支钢板变形研究[J]. 高压物理学报, 2023, 37(5): 054102. doi: 10.11858/gywlxb.20230685
YANG Rui, WANG Quan, XIE Shoudong, LI Rui, TU Changchang, XU Xiaomeng, LI Xiaochen. Deformation of Fixed Support Steel Plate under Explosion Load in Negative Pressure Environment[J]. Chinese Journal of High Pressure Physics, 2023, 37(5): 054102. doi: 10.11858/gywlxb.20230685
Citation: YANG Rui, WANG Quan, XIE Shoudong, LI Rui, TU Changchang, XU Xiaomeng, LI Xiaochen. Deformation of Fixed Support Steel Plate under Explosion Load in Negative Pressure Environment[J]. Chinese Journal of High Pressure Physics, 2023, 37(5): 054102. doi: 10.11858/gywlxb.20230685

负压爆炸载荷作用下固支钢板变形研究

doi: 10.11858/gywlxb.20230685
基金项目: 国家自然科学基金(11872002);精细爆破国家重点实验室开放课题(PBSKL-2022-B-05);煤炭安全精准开采国家地方联合工程研究中心开放基金(EC2021015)
详细信息
    作者简介:

    杨 锐(1999-),男,硕士研究生,主要从事爆炸毁伤研究. E-mail:2240036819@qq.com

    通讯作者:

    汪 泉(1980-),男,博士,教授,博士生导师,主要从事爆炸理论与技术研究. E-mail:wqaust@163.com

  • 中图分类号: O383.1

Deformation of Fixed Support Steel Plate under Explosion Load in Negative Pressure Environment

  • 摘要: 为研究负压爆炸载荷作用下结构的动态响应,以固支钢板为防护工程的简化单元,开展了负压爆炸实验,探究固支钢板在负压爆炸载荷作用下的变形规律,分析不同负压环境下固支钢板的极限应变和失效条件。采用AUTODYN对负压爆炸载荷作用下固支钢板的动态响应进行数值模拟,通过对比实验结果,验证了数值模拟结果的准确性。结果表明:随着初始环境压力的下降,相同爆距下钢板中心点的最大挠度和最大速度减小;负压爆炸载荷作用下,钢板整体出现塑性大变形,迎爆面形成凹坑,钢板四周在垂直于固支边界指向钢板中心的方向上出现明显的拉伸变形,钢板边缘区的挠度变化基本相同,中心点的最大挠度随着环境压力的下降而减小。通过双向应变假设,确定了钢板的动态极限应变为0.269。建立了负压环境下炸药爆炸冲击波的反射比冲量公式,并对基于刚塑性假设和能量准则提出的失效判据进行检验。研究结果可为负压环境下爆炸空气冲击波威力等效评估、高原环境下目标毁伤评估提供参考。

     

  • 图  实验示意图

    Figure  1.  Schematic diagram of the experiment

    图  实验后钢板的形貌

    Figure  2.  Morphology of the steel plate after the experiment

    图  钢板变形轮廓

    Figure  3.  Deformation contours of steel plates

    图  工况4中钢板的破坏模式

    Figure  4.  Damage mode of steel plates in case 4

    图  几何模型

    Figure  5.  Geometrical model

    图  不同负压环境下钢板的变形情况

    Figure  6.  Deformation of steel plate under different negative pressure environments

    图  钢板中心点速度曲线

    Figure  7.  Velocity curves at center point of steel plate

    表  1  实验工况

    Table  1.   Experimental conditions

    Casepe/kPaW/gTNT equivalence/gExplosion distance/mm
    160150130150
    280150130150
    3101150130150
    410120017050
    下载: 导出CSV

    表  2  开裂处钢板厚度的测量结果

    Table  2.   Measurement results of steel thickness at crack

    Measuring
    point
    Thickness/
    mm
    Down gauging
    rate
    Bidirectional
    ultimate strain
    Measuring
    point
    Thickness/
    mm
    Down gauging
    rate
    Bidirectional
    ultimate strain
    10.600.400.29150.640.360.250
    20.620.380.27060.540.460.361
    30.520.480.38770.660.340.231
    40.680.320.21380.700.300.195
    下载: 导出CSV

    表  3  失效判别式的相关参数

    Table  3.   Relevant parameters for failure discriminant

    Case ir/(Pa∙s) v0/(m∙s−1) $ \dot{\varepsilon } $/s−1 α σd/MPa εm η
    1 742.1 94.5 326.8 2.52 592.2 0.059 0.219
    2 816.8 104.1 359.9 2.55 599.3 0.071 0.264
    3 882.8 112.5 389.0 2.57 604.0 0.082 0.305
    4 3204.1 408.2 1411.4 3.04 714.4 0.915 3.401
    下载: 导出CSV

    表  4  材料参数[21]

    Table  4.   Material parameters[21]

    ρs/(g·cm−3)A/MPaB/MPanCmTm/K
    7.85293.8230.20.5780.06520.7061795
    下载: 导出CSV

    表  5  不同环境压力对应的空气密度

    Table  5.   Air densities at different environment pressures

    Pressure/kPa Density/(kg·m−3) Pressure/kPa Density/(kg·m−3)
    101 1.225 40 0.484
    80 0.967 20 0.242
    60 0.725
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-06-21
  • 修回日期:  2023-07-11
  • 网络出版日期:  2023-09-15
  • 刊出日期:  2023-11-07

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