[Objectives] In order to improve the blast resistance of lightweight aluminum foam sandwich panels,this paper studies the dynamic response of functionally graded aluminum foam sandwich panels under air blast loading using AUTODYN finite element software.[Methods] Under the conditions of the same height and weight of the core,the influence of the core layer arrangement on velocity response, plastic deformation and energy absorption are analyzed and discussed.[Results] The results show that the maximum velocity of the center point of the front face decreases with the increase of the core density of the first layer. Sandwich panels with high/low/middle core density arrangements provide the best blast resistance. The graded core absorbs most of the shock energy,and sandwich panels with a lower core density placed in the first layer have the best energy-absorbing performance. [Conclusions] The numerical analysis results in this paper can provide references for the optimum design of the core of aluminum foam sandwich panels.%[目的]为了提高轻质泡沫铝夹层板的抗爆性能,[方法]通过采用有限元软件AUTODYN,对功能梯度泡沫铝夹层板在空爆载荷作用下的动态响应开展研究.在功能梯度泡沫铝夹层板的芯层高度及重量不变的情况下,分析讨论芯层不同排列顺序对夹层板上、下面板中心处速度、塑性变形和各部件吸能的影响.[结果]结果表明:夹层板上面板中心点处最大速度随迎爆面一侧芯层密度的增大而减小;芯层密度从迎爆面到背爆面依次为高—低—中排列顺序的夹层板的抗爆性能最好;芯层吸收了大部分能量,并且在迎爆面一侧密度小的排列组合其吸能特性最好.[结论]数值分析结果可为泡沫铝夹层板的芯层优化设计提供参考.
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