潘腾 , 卞晓兵 , 袁名正 , 等 . 爆炸冲击波作用下聚氨酯-半球夹芯结构的动态响应 [J ] . 兵工学报 , 2023 , 44 ( 12 ): 3580 - 3589 . DOI: 10.12382/bgxb.2023.0645 http://doi.org/10.12382/bgxb.2023.0645 提高防爆装备的抗爆性能已经成为热门的研究课题,目前的防爆装备主要采用金属制成,一般重量大,采用点阵夹芯结构可以实现轻量化。点阵夹芯结构具有良好的能量吸收效率和在高应变率下的优异力学性能,但以往的防爆研究未考虑过不易变形的半球型点阵,复合了聚氨酯泡沫的抗爆夹芯结构研究更为少见。鉴于此,结合聚氨酯泡沫缓冲吸能以及半球结构的拱形抗变形能力提出一种新型的聚氨酯-半球夹芯结构,并且采用实验和数值模拟相结合的方法对聚氨酯-半球夹芯结构在爆炸冲击波载荷下的动态响应进行研究。研究结果表明,在500g TNT当量0.65m爆炸冲击下,相近面密度的聚氨酯-半球夹芯结构中心点位移最小,相较于铝板和纯半球夹芯板分别减小了30%和35%,纯半球夹芯板虽然吸能最多但是变形最大,聚氨酯-半球夹芯结构和铝板的吸能分别为纯半球夹芯板的85%和63%,相较于铝板,聚氨酯-半球夹芯结构在保证能量吸收效率的同时能有效减少靶板速度和应力集中。

PAN T , BIAN X B , YUAN M Z , et al. Dynamic response of polyurethane-hemisphere sandwich structure under action of explosive shock wave [J ] . Acta Armamentarii , 2023 , 44 ( 12 ): 3580 - 3589 . (in Chinese) DOI: 10.12382/bgxb.2023.0645 http://doi.org/10.12382/bgxb.2023.0645 Improvement of blast resistance of explosion-proof equipment has become a popular research topic. The current explosion-proof equipment is mainly made of metal, generally having considerable weight, the use of lattice sandwich structure can achieve lightweight. Lattice sandwich structure has good energy absorption efficiency and excellent mechanical properties at high strain rates, but the non-deformable hemispherical lattice has not been considered in the previous explosion protection research, and the research on composite polyurethane foam explosion-resistant sandwich structure is even more rare. In view of this, a new type of polyurethane-hemispherical sandwich structure is proposed in considering the energy absorption of polyurethane foam and the arch deformation resistance of hemispherical structure, and a combination of experiment and numerical simulation is used to study the dynamic response of polyurethane-hemispherical sandwich structure under the blast shockwave loading. The results show that the center point displacement of polyurethane-hemisphere sandwich structure with the approximate surface density is the smallest under 0.65m blast impact of 500g TNT, which is 30% and 35% smaller than that of aluminum plate and pure hemisphere sandwich plate, respectively. The pure hemisphere sandwich plate absorbs the most energy but has the largest deformation, and the energy absorption of polyurethane-hemisphere sandwich structure and aluminum plate is 85% and 63% of that of the pure hemisphere sandwich plate, respectively, which shows that the incorporation of polyurethane has a significant role in ensuring the energy absorption. It can be seen that, compared with the aluminum plate, the polyurethane-hemispheres sandwich structure can effectively reduce the speed and stress concentration of the target plate while ensuring the energy absorption efficiency.

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王昊 , 徐斌 , 王舒 , 等 . 盒型芯层波纹板的抗爆炸冲击防护性能 [J ] . 兵工学报 , 2023 , 44 ( 12 ): 3687 - 3695 . DOI: 10.12382/bgxb.2023.0256 http://doi.org/10.12382/bgxb.2023.0256 针对波纹板受爆炸载荷冲击的变形吸能问题,对梯形波纹结构进行顶部开口和折叠改进,提出一种盒型结构作为波纹板芯层,以提高其在爆炸冲击载荷下的吸能特性。通过对盒型芯层的单个胞元进行准静态压缩试验,与kirigami改进梯形波纹结构对比,比较吸能值、质量比吸能、初始压垮峰值力、平均压垮力、压垮力效率等主要吸能指标。应用有限元软件建立数值模拟模型,利用试验数据对数值模拟模型进行校正,将不同长宽比的盒型结构和kirigami改进梯形波纹结构阵列排布作为波纹板芯层,对比不同芯层波纹板在相同爆炸载荷作用下的抗爆性能,分析吸能值与背板变形量等特征,并结合变形过程应力云图分析波纹板在爆炸载荷作用下的响应。研究结果表明,所提出的盒型芯层具有质量比吸能值高,变形模式均匀稳定,有效吸能行程长等优良的吸能特性,以其为芯层的波纹板在爆炸冲击载荷作用下,能有效降低背板变形,在爆炸冲击防护领域具有潜在的应用前景。

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