聚氨酯/钢夹芯结构爆炸载荷下动力学响应的数值模拟

聚氨酯泡沫具有良好的缓冲和吸能性能，以硬质聚氨酯泡沫作为芯体，钢作为面板的夹芯结构在工程中用途广泛。为了研究聚氨酯/钢夹芯结构在爆炸载荷作用下的抗爆性能，利用Ansys/Autodyn非线性有限元程序对聚氨酯/钢夹芯结构在爆炸载荷作用下的动力学响应进行数值模拟分析，并与相同面密度的钢板进行对比。结果表明，加入聚氨酯芯体后，结构的吸收能量为相同面密度钢板的1.49倍，整体结构的抗爆性能得到很大的提高。

Numerical simulation on dynamic response of polyurethane/steel sandwich structure under blast loading

As polyurethane foam has a good cushioning and energy absorption performance, the sandwich structure with polyurethane foam as core and the steel as the shell plate has been widely used in engineering application. In this paper, in order to study the anti-explosion performance of the sandwich structure, the numerical simulation by Ansys/Autodyn nonlinear finite element code is adopted to analyze the energy absorption properties of the sandwich structure under blast loading and compared with that of the steel plate that has the same area density. The results show that, with the polyurethane foam as core body, the energy sandwich structure absorbed is 1.49 times that of the steel plate with the same area density, and the anti-explosion performance of the overall structure is greatly improved.