两点爆炸冲击波对冰的破坏效应的仿真分析

为研究两点水下爆炸冲击波对冰体的破坏效应,基于ANSYS/Ls-dyna仿真软件,分析了同时起爆的情况下相间距对冲击波破坏冰体的影响,并与单点爆炸情况进行冲击波峰值压力对比.通过分析冲击波压力和破坏面形状,得出:在两点同时起爆的情况下,冲击波发生叠加,冲击波压力比单点爆炸的冲击波压力大,破坏效果好;相间距过小时冰体破坏面中间部分过于突出,相间距过大时冰体破坏面中部区域变小,甚至消失;最优相间距应为单点爆炸时冰体破坏面直径的0.91倍.

Simulation and Analysis of Damage Effect of Double Explosions Shock Wave on the Ice

In order to investigate the demolition effect on the ice induced by double underwater explosions shock wave, Ansys/Ls-dyna simulation software was used to analyze influences of the phase spacing on shock wave breaking ice body in the ease of the detonation initiation at the same time, and contrast the peak pressure of shock wave with the one under the cirrcumstance of single explosion. Through the analysis of shock wave pressure and the shape of failure surface, the conclusions were drawn ： in the case of the double simultaneous detonations, the shock wave was superimposed, and the pressure was larger than a single point nf shock wave pressure as well as damage effects were good; if phase spacing was too small, the middle part of the ice failure surface was too prominent and if tuo large, too small so as to disappear; the optimal phase spacing should be the 0.91 times the failure surface diameter of a single explo-sion.