内部爆炸作用下混凝土靶背面临界震塌条件

为研究内部爆炸作用下混凝土靶背面临界震塌条件,采用量纲分析对内部爆炸作用下有限厚混凝土靶背面震塌破坏进行研究,得到了量纲一的临界震塌厚度的工程计算式. 结果表明,当装药密度一定时,随着装药直径或装药长径比的增加,临界震塌厚度也非线性递增,且存在极限临界震塌厚度;研究表明,临界震塌厚度关于装药直径存在第二类自相似. 

Critical Collapse at Rear Surface of Concrete Targets Under Internal Explosion

To study critical collapse at rear surface of concrete targets under internal explosion, the collapse on the rear surface of concrete targets with finite thickness under internal explosion was studied, and the engineering formula of the dimensionless critical collapse thickness was obtained. The result shows that, when the density of charge is fixed, the critical collapse thickness increases non-linearly with the increase of the diameter or the length-to-diameter ratio of charge, and has a limit value. In addition, it is found that there exists the second kind of similarity of the critical collapse thickness in the diameter of charge.