聚脲弹性体夹芯防爆罐抗爆性能研究

Anti-detonation properties of explosion-proof pots made of sandwich structures with polyurea elastomer

应用ANSYS/LS-DYNA有限元软件对三种防爆罐在1.2 kg TNT爆炸载荷作用下的动态响应过程进行数值模拟。研究了无夹层、聚脲弹性体夹层和橡胶夹层防爆罐的抗爆性能。分析了不同夹层对防爆罐整体变形的影响及聚脲弹性体和橡胶夹层的吸能特性。通过聚脲弹性体夹层防爆罐在爆炸载荷作用下的变形试验研究,验证了数值计算结论的可靠性;结果表明,在相同爆炸载荷作用下,无论变形或能量吸收方面,聚脲弹性体夹层防爆罐都优于无夹层防爆罐和橡胶夹层防爆罐;冲击波在聚脲弹性体传播过程中衰减幅度最大。

The finite element code ANSYS / LS-DYNA was used to numerically simulate the processes of dynamic response of three kinds of explosion-proof pots under explosive loading of 1. 2 kg TNT. Anti-detonation properties of explosion-proof pots made of different sandwich structures with no-sandwich,polyurea elastomer and rubber were studied.The effects of different sandwich structures on the global deformation of explosion-proof pots and the energy absorption characteristics of polyurea elastomer sandwich and rubber sandwich were analyzed. The reliability of the simulation results was validated with deformation tests of explosion-proof pots made of sandwich with polyurea elastomer under explosive loading. The results demonstrated that either the deformation or the energy absorption of explosion-proof pots made of sandwich with polyurea elastomer is superior to that of those without sandwich and made of sandwich with rubber under the same explosive loading; the attenuating level of shock wave propagation in polyurea elastomer is the largest.