CHINESE JOURNAL OF ENERGETIC MATERIALS
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活性射流侵彻-内爆作用下半无限混凝土靶中应力波效应
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作者单位:

1.东南大学土木工程学院, 江苏 南京 210096;2.东南大学爆炸安全防护教育部工程研究中心, 江苏 南京 211189;3.陆军工程大学野战工程学院, 江苏 南京 210007

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基金项目:

国家自然科学基金(52378487, 52378488)


Stress Wave Effect in Semi-Infinite Concrete Targets Subjected to Penetration-Implosion Action of Reactive Jet
Author:
Affiliation:

1.School of Civil Engineering, Southeast University, Nanjing 210096, China;2.Engineering Research Center of Safety and Protection of Explosion Impact of Ministry of Education,Southeast University, Nanjing 211189, China;3.College of Field Engineering, Army Engineering University of PLA, Nanjing 210007, China

Fund Project:

Grant support: National Natural Science Foundation of China(52378487, 52378488)

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    摘要:

    为了研究活性射流侵彻-内爆作用下半无限混凝土靶中应力波效应,开展了两组活性射流侵爆试验,获得了混凝土中的应力波数据和典型的混凝土靶破坏模式。利用LS-DYNA软件,结合重启动算法对活性射流侵彻-内爆过程进行分阶段模拟,并分析了活性射流侵爆联合作用下混凝土中应力波传播特性。研究结果表明:数值模拟的应力波及靶体破坏特征与试验结果吻合较好,活性射流侵彻阶段,混凝土主要先后受到动态应力波区和静高压区的加载作用发生破坏,其中后者加载速度更快,但作用时间更短。活性射流侵彻造成的混凝土损伤加快了能量耗散,降低了爆炸阶段的峰值应力,但加速了应力波传播,与未损伤靶体相比,射流侵彻后的靶体中爆炸峰值应力最大降低了47%,应力波传播速度增长率最高可达7%。然而,当测点深度超度335 mm时,射流侵彻对爆炸阶段的影响可以忽略不计。

    Abstract:

    To investigate the stress wave effect in semi-infinite concrete targets under penetration-implosion loadings induced by reactive jet (RJ), two sets of RJ peneration-implosion experiments were conducted to obtain stress wave data and characteristic damage patterns of concrete targets. LS-DYNA software combined with a restart algorithm was used for staged numerical simulations of the penetration-implosion process, and to analyze the stress wave propagation characteristics in concrete under the combined action of RJ penetration and explosion. The findings demonstrate that numerical and experimental results showed good agreement in stress waves and target damage features. During the penetration stage of RJ, concrete failure occurs after successive loadings of dynamic stress wave zone and static high-pressure zone, with the latter having a faster loading rate but a shorter action duration. The concrete damage caused by RJ penetration accelerates energy dissipation, reduces peak stress during the explosion stage, but accelerates stress wave propagation. Compared with the undamaged target, the peak stress of the explosion in the target after RJ penetration decreased by up to 47%, and the growth rate of the stress wave propagation speed could reache up to 7%. However, when the depth of measuring point exceeds 335 mm, the influence of RJ penetration on the explosion stage can be ignored.

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引用本文

周鑫,冯彬,陈力,等.活性射流侵彻-内爆作用下半无限混凝土靶中应力波效应[J].含能材料, 2025, 33(7):689-702. DOI:10.11943/CJEM2025079.
ZHOU Xin, FENG Bin, CHEN Li, et al. Stress Wave Effect in Semi-Infinite Concrete Targets Subjected to Penetration-Implosion Action of Reactive Jet[J]. Chinese Journal of Energetic Materials, 2025, 33(7):689-702. DOI:10.11943/CJEM2025079.

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历史
  • 收稿日期: 2025-04-22
  • 最后修改日期: 2025-07-07
  • 录用日期: 2025-07-02
  • 在线发布日期: 2025-07-07
  • 出版日期: