爆炸冲击波作用下聚脲材料对肺冲击伤防护作用的数值模拟研究

刘迪 陈菁 张安强 赵晓东 张双博 康建毅 李朝龙 曾灵

刘迪, 陈菁, 张安强, 赵晓东, 张双博, 康建毅, 李朝龙, 曾灵. 爆炸冲击波作用下聚脲材料对肺冲击伤防护作用的数值模拟研究[J]. 爆炸与冲击. doi: 10.11883/bzycj-2024-0205
引用本文: 刘迪, 陈菁, 张安强, 赵晓东, 张双博, 康建毅, 李朝龙, 曾灵. 爆炸冲击波作用下聚脲材料对肺冲击伤防护作用的数值模拟研究[J]. 爆炸与冲击. doi: 10.11883/bzycj-2024-0205
LIU Di, CHEN Jing, ZHANG Anqiang, ZHAO Xiaodong, ZHANG Shuangbo, KANG Jianyi, LI Chaolong, ZENG Ling. Numerical simulation study on the protective effects of polyurea materials against lung blast injuries under blast wave loading[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0205
Citation: LIU Di, CHEN Jing, ZHANG Anqiang, ZHAO Xiaodong, ZHANG Shuangbo, KANG Jianyi, LI Chaolong, ZENG Ling. Numerical simulation study on the protective effects of polyurea materials against lung blast injuries under blast wave loading[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0205

爆炸冲击波作用下聚脲材料对肺冲击伤防护作用的数值模拟研究

doi: 10.11883/bzycj-2024-0205
基金项目: 后勤科研重点项目(BLJ23J006);军委科技委基础加强计划重点基础研究项目(ZD-254-05);陆军特色医学中心人才创新能力培养计划(ZXYZZKY03)
详细信息
    作者简介:

    刘 迪(1993- ),女,硕士,助理研究员,heidi678@tmmu.edu.cn

    通讯作者:

    陈 菁(1968- ),女,博士,研究员,chenj811@tmmu.edu.cn

  • 中图分类号: O389

Numerical simulation study on the protective effects of polyurea materials against lung blast injuries under blast wave loading

  • 摘要: 肺冲击伤是爆炸后第一级冲击伤最常见死因,进行有效防护是减轻伤情、提升救治效能的最优举措。聚脲材料作为躯体防具的研究尚在起步阶段,本研究通过有限元数值模拟探讨了冲击波作用下聚脲材料对肺脏的防护效应及其对冲击波的衰减特性。首先利用LS-DYNA软件模拟冲击波对穿戴防护材料的山羊胸部的直接损伤过程,然后通过实爆测压数据及肺大体伤情进行有效性验证,最后利用该冲击波防护后效应有限元计算模型完成聚脲材料对人员肺冲击伤防护效应的评估。结果表明:右肺朝向爆心时,冲击波肺损伤应力主要集中在右肺下叶,防护模型肺脏整体应力较小,肺所受负压所致肺过牵效应减弱;聚脲材料能够有效衰减到达皮肤和肺脏表面的超压峰值约58.8%(p < 0.05),降低胸骨最大线速度约22.4%,且随冲击波压强增大衰减能力增强,从而有效降低肺冲击伤的发生率和严重程度。建立的人员防护效应计算机仿真评估模型为新型防护材料用于人员肺冲击伤的防护效能评估、防护后损伤程度预测提供了方法,具有重要的军事和社会意义。
  • 图  1  山羊胸部有限元模型

    Figure  1.  Finite element models of the goat thorax

    图  2  压力源正对胸部右侧的冲击波加载模型

    Figure  2.  The blast wave loading model with a pressure source facing the right side of the thorax

    图  3  实爆试验传感器测压示意图及测压曲线

    Figure  3.  Diagrams of sensor detection in live explosion test and measured pressure curves

    图  4  500 kPa工况下山羊有限元模型肺最大应力云图与旷场实爆实验4 m处山羊肺大体损伤情况对比

    Figure  4.  Comparison of lung stress cloud diagram of goat finite element model under 500 kPa condition and gross lung injury in field explosion test at 4 m

    图  5  人员穿戴防护材料的冲击波加载有限元模型

    Figure  5.  Finite element models of personnel wearing protective material for blast wave loading

    图  6  冲击波加载压力场分布

    Figure  6.  Pressure field distribution of blast wave loading

    图  7  100 kPa工况下无/有防护肺脏内应力的传播

    Figure  7.  Stress propagation in lung without and with protection under the 100 kPa condition

    图  8  不同工况下无有防护时肺表面的压力曲线

    Figure  8.  Pressure curve near the surface of right lung

    图  9  皮下5 cm处肺矢状面压力曲线

    Figure  9.  Pressure curve 5 cm below the skin of right lung

    图  10  肺内应力曲线

    Figure  10.  Peak lung stress curve

    图  11  聚脲材料对冲击波的衰减规律

    Figure  11.  Attenuation pattern of blast waves by polyurea material

    图  12  5种工况下胸骨最大线速度响应曲线

    Figure  12.  Maximum linear velocity response curves of sternum under five conditions

    图  13  防护前后胸骨最大线速度的对应关系

    Figure  13.  Corresponding relationship of the maximum linear velocities of the sternum before and after protection

    表  1  山羊胸部各组织的材料特性

    Table  1.   Material properties of various tissues in the goat thorax

    组织 ρ/(kg∙m−3) K/MPa G0/kPa G/kPa β/s−1 E/MPa υ
    胸骨 1250 9500 0.25
    软骨 1070 2.5 0.4
    肋骨 1080 9500 0.2
    脊柱 1330 355 0.26
    心脏 1000 744 67 65 0.1
    肺脏 600 744 67 65 0.1
    皮肤组织 1300 4000 200 195 0.1
    下载: 导出CSV

    表  2  防护材料的材料特性参数

    Table  2.   Material properties of protective materials

    材料模型ρ/(kg∙m−3)υE/MPaC/s−1D
    MAT2410700.46515098.164.52
    下载: 导出CSV

    表  3  不同工况下人员无/有防护肺脏学响应分布

    Table  3.   Distribution of intrapulmonary mechanical responses in personnel without and with protection

    ps/kPa肺表面超压峰值/kPa肺矢状面超压峰值/kPa肺峰值应力/kPa
    100117.23/25.55(78.2%)43.30/15.27(64.7%)2.35/1.21(48.5%)
    300155.86/47.81(69.3%)66.58/39.17(41.2%)10.66/5.05(52.6%)
    400259.60/107.20(58.7%)113.24/53.30(52.9%)14.30/6.15(57.0%)
    500395.45/144.60(63.4%)145.19/69.93(51.8%)18.38/7.54(59.0%)
    700631.04/178.16(71.8%)217.42/107.71(50.5%)23.50/12.19(48.1%)
     注:括号内为有防护相对无防护的衰减百分比。
    下载: 导出CSV

    表  4  不同工况防护材料前后及无防护模型皮肤处超压峰值对比

    Table  4.   Comparison of peak overpressure at skin for five conditions with and without protective material

    ps/kPa 无防护皮肤超压峰值/kPa 有防护材料前超压峰值/kPa 防护材料后超压峰值/kPa
    100 128.21(51.5%) 106.69(41.8%) 62.14
    300 249.35(49.9%) 217.13(42.5%) 124.91
    400 357.10(58.7%) 310.41(52.4%) 147.63
    500 598.10(68.2%) 465.39(59.1%) 190.42
    700 776.05(65.5%) 724.68(63.1%) 267.61
     注:括号内为材料后超压峰值的衰减百分比。
    下载: 导出CSV
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  • 收稿日期:  2024-06-27
  • 修回日期:  2024-09-09
  • 网络出版日期:  2024-09-12

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