The blast response of clamped sandwich panels with layered-gradient aluminium foam cores was studied experimentally and numerically. The effective blast impulse acting on specimens in ballistic pendulum tests was first calibrated, and the influences of blast impulse and core-layer arrangement on the deformation modes and shock resistance were revealed. Then, the corresponding numerical simulations were conducted. The finite element model was validated via the displacement–time curves of the ballistic pendulum system and the deformation profile and deflection response of sandwich specimens. The blast pressure, deformation process, energy absorption, strain evolution, and distribution of blast-loaded sandwich panels are discussed. The experimental and numerical results show that all the layered-gradient core sandwich panels have a weaker blast resistance capability than the ungraded sandwich panels because of the reduction in structural integrity of the specimens. For a given effective impulse, the specific energy absorption value of the positive gradient sandwich panels is the largest, followed by that of the ungraded sandwich panels, whereas that of the negative gradient sandwich panels is the lowest.

通过实验和数值研究了夹层夹层铝泡沫夹芯板的爆炸响应。首先对弹道试验中作用在试样上的有效冲击波进行了标定，揭示了冲击波和芯层排列对变形方式和抗冲击性的影响。然后，进行了相应的数值模拟。通过弹道摆系统的位移-时间曲线以及夹心试样的形变曲线和挠度响应，对有限元模型进行了验证。讨论了爆炸载荷，夹层板的爆炸压力，变形过程，能量吸收，应变演化和分布。实验和数值结果表明，由于样品结构完整性的降低，所有分层梯度芯夹心板的抗爆炸能力都比未分级夹心板弱。对于给定的有效脉冲，正梯度夹心板的比能量吸收值最大，其次为未分级夹心板的比能量吸收值，而负梯度夹心板的比能量吸收值最低。