孔结构金属复合夹芯板抗爆炸冲击响应及吸能特性研究  

Study on blast resistance and energy absorption of perforatedmetal sandwich plates

作　　者：秦庆华[1] 艾伟龙[1] 张建勋[1] QIN Qing-hua;AI Wei-long;ZHANG Jian-xun(State Key Laboratory for Strength and Vibration of Mechanical Structures,School of Aerospace Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学航天航空学院机械结构强度与振动国家重点实验室

出　　处：《计算力学学报》2019年第4期491-497,共7页Chinese Journal of Computational Mechanics

基　　金：国家自然科学基金(11572234;11502189;11372235);陕西省自然科学基础研究计划(2017JM1020)资助项目

摘　　要：采用有限元方法研究爆炸载荷下四边固支孔结构金属复合夹芯板的动力响应及吸能特性,给出了孔结构金属复合夹芯板的动力响应过程,得到夹芯板的变形模式,比较了孔结构金属复合夹芯板与非孔结构金属复合夹芯板的抗爆炸冲击性能,同时讨论了孔大小、间距、排布方式和面板质量分布等因素对孔结构金属复合夹芯板抗爆炸冲击性能的影响。研究结果表明,迎爆面外面板的孔设计使爆炸冲击波穿过孔洞直接作用在芯材上,增强了芯材的压缩,从而提高了夹芯板的能量吸收能力。同等面密度情况下,内外面板厚度比大于1的孔结构金属复合夹芯板变形挠度小于内外面板厚度比小于1的孔结构金属复合夹芯板。进一步研究发现,通过合理设计内外面板的质量分布,可以使孔结构金属复合夹芯板的抗爆炸冲击性能最优。In this paper,dynamic response and energy absorption of clamped perforated metal sandwich plates is studied using the finite element method.The process of dynamic response and deformation modes of perforated metal sandwich plates are obtained.Comparison of dynamic responses between perforated and unperforated sandwich plates is made.Effects of size,space,arrangement of holes and mass distribution of the face sheets on blast resistance of sandwich plates are discussed in detail.It is shown that the shock wave applied on metal foam core through the holes in outer face sheet results in enhanced the core compression and improved energy absorption of sandwich plates.The deflection of sandwich plates with thicknesses ratio of inner face sheet to outer face sheet larger than 1 is less than that of is the plates with thickness ratios of smaller than 1 for the same area density.Optimal blast resistance of perforated sandwich plates is achieved by rationally designing mass distribution of face sheets.

关 键 词：孔结构复合夹芯板 金属泡沫 爆炸冲击 结构塑性 能量吸收 

分 类 号：O389[理学—流体力学] O347.3[理学—力学]