防护堤对爆炸空气冲击波防护效果的数值分析

摘要

Different gradient of barricades are designed according to DoD standards, arbitrary La-grangian-Eulerian (ALE) algorithm is used to simulate the explode process of cohesion detonator and the spread process of the shock wave, and the weakening effect is analyzed with emphasis according to different gradient. The simulation results show that the setting of barricade has important effect to weakening the explosion shock wave, and it can reduce the effect of peak pressure that can ease the hazard, the weakening effect become weaker from the just backside to the brinks and the gradient of barricade can reduce the hazard of shock wave markedly.%根据美国国防部相关标准设计了不同坡度的防护堤,采用任意拉格朗日-欧拉算法(arbitrary Lagrangian-Eulerian,ALE),仿真了凝聚炸药的爆炸及其产生的空气冲击波的传播过程,重点分析了不同坡度的防护堤对空气冲击波的防护能力.仿真结果表明:防护堤的设置在空气冲击波的防护过程中起着显著作用,其能够有效地减弱空气冲击波峰值超压对被防护对象的危害,防护能力由防护堤正后方向两边呈减弱趋势,同时防护堤坡度明显影响其对爆炸空气冲击波的防护能力.