聚脲喷涂铝蜂窝结构抗爆性能数值模拟

Numerical Simulation of Anti-detonation Performance of Polyurea Sprayed Aluminum Honeycomb Structure

聚脲具有良好的力学性能,喷涂在结构上可提高结构的抗爆性能。运用ANSYS/LS-DYNA有限元软件对四种复合靶板在20gTNT爆炸载荷作用下的动态响应过程进行数值模拟。针对常用的喷涂方式,研究了聚脲对蜂窝结构进行正面喷涂、背面喷涂、双面喷涂和蜂窝内腔填充聚脲四种靶板的抗爆性能。分析了不同喷涂类型靶板的变形特点,并对比分析了靶板中各个部分的吸能特性。结果表明,聚脲以不同的喷涂方式喷涂于靶板上,使得靶板的吸能能力、吸能方式有较大的差别。无论是变形还是吸能方面,蜂窝内腔填充聚脲类型靶板都优于其他三种类型,抗爆效果最佳。

Polyurea has good mechanical properties.Spraying structure can improve the anti detonation performance of the structure.The finite element code ANSYS/LS-DYNA was used to numerically simulate the process of dynamic response of three four kinds of the composite target plate under explosive loading of 1.2kg TNT.In view of the usual spraying methods,the anti detonation performance of four target plates,that are polyurea spraying on honeycomb in positive spraying,back spraying,duplex surface spraying and in honeycomb cavity,was studied.The deformation characteristics of different types of target plates are analyzed,and the energy absorption characteristics of each part of the target plate are compared and analyzed.The results show that the honeycomb is the main energy absorption part in the target plate.In terms of deformation or energy absorption,the target plate of polyurea spraying in honeycomb is superior to three other kinds.