混凝土中爆炸应力波衰减规律的数值模拟研究

高矗 孔祥振 方秦 王银 杨亚

高矗, 孔祥振, 方秦, 王银, 杨亚. 混凝土中爆炸应力波衰减规律的数值模拟研究[J]. 爆炸与冲击, 2022, 42(12): 123202. doi: 10.11883/bzycj-2022-0041
引用本文: 高矗, 孔祥振, 方秦, 王银, 杨亚. 混凝土中爆炸应力波衰减规律的数值模拟研究[J]. 爆炸与冲击, 2022, 42(12): 123202. doi: 10.11883/bzycj-2022-0041
GAO Chu, KONG Xiangzhen, FANG Qin, WANG Yin, YANG Ya. Numerical study on attenuation of stress wave in concrete subjected to explosion[J]. Explosion And Shock Waves, 2022, 42(12): 123202. doi: 10.11883/bzycj-2022-0041
Citation: GAO Chu, KONG Xiangzhen, FANG Qin, WANG Yin, YANG Ya. Numerical study on attenuation of stress wave in concrete subjected to explosion[J]. Explosion And Shock Waves, 2022, 42(12): 123202. doi: 10.11883/bzycj-2022-0041

混凝土中爆炸应力波衰减规律的数值模拟研究

doi: 10.11883/bzycj-2022-0041
基金项目: 国家自然科学基金(52178515)
详细信息
    作者简介:

    高 矗(1988- ),男,博士研究生,讲师,gaochu0617@163.com

    通讯作者:

    孔祥振(1988- ),男,博士,副教授,ouckxz@163.com

  • 中图分类号: O382

Numerical study on attenuation of stress wave in concrete subjected to explosion

  • 摘要: 基于Kong-Fang混凝土材料模型和LS-DYNA的多物质ALE算法,开展混凝土中爆炸波衰减规律的数值模拟研究。首先,基于已有实验数据对材料模型参数和数值算法的可靠性进行了验证,在此基础上分析球形装药在混凝土自由场中爆炸波衰减规律,利用量纲分析和数值模拟拟合了球形装药在混凝土自由场中近区爆炸波峰值应力计算公式并明确其适用范围;然后,分析装药埋深对混凝土中装药正下方不同距离处爆炸波峰值应力分布的影响,建立了耦合系数与装药埋深和测点距离之间的定量关系。结果表明:Kong-Fang混凝土材料模型可实现对混凝土中爆炸波传播衰减规律的高精度数值模拟;定义混凝土中装药质量系数和耦合常数,可定量描述装药埋深和测点距离对峰值应力耦合系数的影响;建立的混凝土中近区爆炸波峰值应力计算公式可较准确地快速预测不同装药埋深、不同测点距离和不同混凝土强度时爆炸波峰值应力。研究结果可为混凝土结构抗爆设计和爆炸毁伤评估提供参考。
  • 图  1  WES5000混凝土的状态方程

    Figure  1.  Equation of state for WES5000 concrete

    图  2  WES5000混凝土的强度面参数

    Figure  2.  Failure surface parameters for WES5000 concrete

    图  3  C100混凝土的状态方程[15]

    Figure  3.  Equation of state for C100 concrete[15]

    图  4  C100混凝土的强度面参数

    Figure  4.  Failure surface parameters for C100 concrete

    图  5  实验示意图[2]

    Figure  5.  Schematic diagram of the experiment[2]

    图  6  实验的有限元模型

    Figure  6.  The finite element model for the experiment

    图  7  不同网格尺寸的压力曲线

    Figure  7.  Pressure curves under different mesh sizes

    图  8  爆炸波峰值应力随距离的变化

    Figure  8.  Variation of explosion wave peak stress with distances

    图  9  不同距离处的应力曲线

    Figure  9.  Stress curves at different distances

    图  10  比例距离0.06~0.20 m/kg1/3时的应力曲线

    Figure  10.  Stress curves at the scaled distances 0.06−0.20 m/kg1/3

    图  11  WES5000混凝土靶体损伤的数值模拟结果

    Figure  11.  Simulation results for WES5000 concrete target damage

    图  12  比例距离0.25~0.60 m/kg1/3时的应力曲线

    Figure  12.  Stress curves at the scaled distances 0.25−0.60 m/kg1/3

    图  13  比例距离0.70~1.60 m/kg1/3时的应力曲线

    Figure  13.  Stress curves at the scaled distances 0.70−1.60 m/kg1/3

    图  14  爆炸空腔周围混凝土介质的变形区域

    Figure  14.  Deformation zones of concrete around the blasting cavity

    图  15  爆炸波峰值应力随距离的变化

    Figure  15.  Variations of explosion wave peak stress with distance

    图  16  不同埋深时WES5000混凝土的爆炸波峰值应力随距离的变化

    Figure  16.  Variations of explosion wave peak stress for WES5000 concrete with distance at different burial depths

    图  17  不同埋深时WES5000混凝土峰值应力耦合系数随距离的变化

    Figure  17.  Variations of peak stress coupling coefficient for WES5000 concrete with distance at different burial depths

    图  18  峰值应力耦合系数随距离的变化规律

    Figure  18.  Variety rule of peak stress coupling coefficient with distance

    图  19  稳定峰值应力耦合系数随质量系数的变化

    Figure  19.  Variation of stable peak stress coupling coefficient with mass coefficient

    图  20  WES5000和C100混凝土的峰值应力耦合系数随距离的变化

    Figure  20.  Variations of peak stress coupling coefficients for WES5000 and C100 concretes with distance

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出版历程
  • 收稿日期:  2022-01-25
  • 修回日期:  2022-03-09
  • 网络出版日期:  2022-03-29
  • 刊出日期:  2022-12-08

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