The objective of this paper is to study the dynamic response of a concave cell structure filled with liquid under the high-speed projectile penetration. Ballistic impact tests were conducted onto the cuboid and concave cells together with the corresponding numerical simulations. The strain gauges were posted onto the typical position to measure the dynamic response of the cell walls. The pressure load on the cell wall was also obtained. The deformation of the post-impact structure was measured using the 3D scanner. The dynamic response of the liquid-filled cell structure and the effects of the structure form were analyzed considering the maximum deformation curve, pressure waves and strain of the cell walls. The results show that the concave cell tends to expand and deform easily compared with the cuboid cell, mitigating the extrusion effects of the liquid. The cavitation pressure load induces the cell expanding deformation and failure. The specific impulse of the cavitation pressure load on the walls, the strain slope, and the maximum strain value are lower for the concave cell.

本文的目的是研究高速射弹穿透下充满液体的凹孔结构的动力响应。对长方体和凹面单元进行了冲击试验，并进行了相应的数值模拟。将应变仪张贴到典型位置以测量细胞壁的动态响应。还获得了细胞壁上的压力负荷。使用3D扫描仪测量了撞击后结构的变形。考虑到最大变形曲线，压力波和细胞壁应变，分析了液体填充细胞结构的动力响应和结构形式的影响。结果表明，与长方体细胞相比，凹形细胞易于扩张和变形，减轻液体的挤出作用。空化压力负荷引起细胞膨胀变形和破坏。对于凹腔，壁上的空化压力载荷的比冲，应变斜率和最大应变值较低。