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为研究爆炸冲击波作用于便携式防爆墙的绕射规律,利用LS/DYNA软件,采用欧拉耦合的方法,分析了TNT药量不同爆距相同、TNT药量相同爆距不同以及TNT药量相同墙厚不同的条件下墙体对环流超压的影响规律,且拟合出了不同TNT药量时墙后超压峰值公式,并通过防爆墙墙前、墙后超压值与已知试验值对比,验证了计算模型的正确性。结果表明:环流超压峰值随着TNT药量的增加而增加,随着墙体厚度的增加而减少,且其超压峰值出现在墙后约2倍墙高位置处;当爆距大于2.4 m时,环流超压的峰值先递增、后递减,最大环流超压发生在约2倍墙高位置;当爆距小于2.4 m时,最大环流超压向墙体移动,距离墙体后面1.0 m左右。验证了其绕射规律与已知研究结果的一致性。
In order to study the diffraction law of blast shock wave acting on the portable explosion-proof wall, using LS-DYNA software and Euler coupling method, it is analyzed that the TNT dose has the same burst distance, the same TNT dose and the same TNT dose Thick wall under different conditions of the circulation overpressure of the law, and fitted with different doses of TNT peak pressure over the wall after the formula, and through the wall before and after the wall Ex wall pressure over the value of the known test values compared with , Verify the correctness of the calculation model. The results show that the peak value of overpressure increases with the increase of TNT dose and decreases with the increase of wall thickness, and the overpressure peak appears at about 2 times of the height of the wall. When the burst distance is more than 2.4 m When the burst distance is less than 2.4 m, the maximum circulation overpressure moves to the wall, and the distance from the wall behind the wall is about 1.0 m . The agreement between the law of diffraction and the known results is verified.