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采用ANSYS/LS-DYNA有限元软件,研究了由三种不同相对密度的泡沫铝组合成的密度非均匀芯层泡沫金属夹芯圆柱壳的水下抗爆性能及均匀型泡沫金属夹芯结构的结构优化.结果表明:泡沫铝芯层相对密度配置顺序对夹芯圆柱壳的抗爆性能影响明显,可以通过调整芯层配置获得最佳吸能性能泡沫金属夹芯圆柱壳;采用Kriging多目标优化分析方法,获得了以夹芯壳单位面积重量最小、中心位移最小和能量吸收最大为目标,上、下面板的厚度的最优解.
The ANSYS / LS-DYNA finite element software was used to study the underwater antiknock performance of the foam core with non-uniform density and three kinds of foams with different relative densities. Structure optimization.The results show that the order of relative density of aluminum foam core has an obvious influence on the antiknock performance of the sandwich cylindrical shell and the best energy absorbing foam metal sandwich cylindrical shell can be obtained by adjusting the core configuration.Using Kriging multi-objective optimization The optimum solution of the thickness of the upper and lower panels is obtained with the aim of minimizing the weight per unit area of the sandwich shell, minimizing the center displacement and absorbing the maximum energy.