空中爆炸载荷下PVC泡沫夹芯板动态响应分析

基于 Abaqus/Explicit，计算分析 PVC夹芯板在空爆载荷作用下的动态响应，考察夹芯板上面板厚度、芯层高度及炸药当量对其抗爆性能的影响，并从能量吸收的角度分析不同工况下 PVC夹芯板的吸能特性。数值结果表明夹芯板的动态响应对其结构配置比较敏感，增加上面板厚度及芯层高度可以明显减小下面板挠度，从而提高结构的抗爆性能。夹芯板的总体吸能量与上面板厚度密切相关，与芯层高度没有明显关联，减小上面板厚度可以提高结构的总体吸能量；在相同工况下，增加上面板厚度可以提高上面板吸能占比，增加芯层高度可以提高芯层吸能占比。在炸药当量较小时，夹芯板变形以上面板局部弯曲及芯层压缩为主；当炸药当量较大时，夹芯板变形以整体弯曲变形为主。研究结果对PVC夹芯板抗爆性能的优化设计具有一定的参考价值。

Dynamic response of PVC foam sandwich panel subjected to air blast loading

In this paper, the dynamic response of PVC foam sandwich panel subjected to the air blast loading was simu-lated by using the software ABAQUS/EXPLICIT, and the influence of the face-sheet’s thickness, and TNT mass to the dy-namic response was evaluated. In addition, the absorption characteristics of sandwich panel were also analyzed. The simula-tion results showed that the structure responses of sandwich panel were sensitive to its configuration, and the permanent de-flection of the bottom face-sheet decreases with increase in top face-sheet and core thickness. The total energy absorbed by the sandwich panel was closely related to the top face-sheet thickness, and the absorption energy increases with the increase of the top face-sheet thickness, while the relativity of the absorption energy and the core thickness was not obvious. In the same load cases, the proportion of the energy absorbed by top face-sheet increased with increase of top face-sheet thickness, and the proportion of the energy absorbed by core increased with increase of core thickness. The local bending of the top face-sheet and the compression of the core were the dominant deformation modes when the TNT mass was relatively small, while the overall bending of the sandwich panel was the key deformation mode when the TNT mass was relatively large. Findings of this paper would provide a reference for optimal design of blast resistance of PVC sandwich panels.