Theory and Method of Equivalent Calculation of Coupling Ground Shock of Earth-Penetrating Explosion

Abstract:

The ground shock of earth-penetrating explosion poses a major threat to underground protection works. It is difficult for the existing experimental methods to establish a calculation method for the coupled ground shock effect of guided earth-penetrating bombs， hypervelocity kinetic energy bombs， and earth-penetrating nuclear bombs. In this paper， the relationship between the volume of the ground-penetrating explosion damage area and the coupled ground shock energy is revealed. According to the relationship between the radius of compression and damage areas of underground explosion and explosion equivalent， the correlation between the existing main coupling factors is clarified. A calculation method for coupling factors is proposed， which only needs two initial parameters， i.e.， the radius of the compression areas of the contact explosion and the closed explosion. The correctness of the method is verified from the aspects of energy coupling factor and equivalent coupling factor through comparative analysis with the existing nuclear test and numerical simulation results of foreign countries. Combined with the calculation of the packing factor， it shows that the coupling factor curve of the ground-penetrating nuclear explosion given by the United States has a good reliability. From the perspective of protection engineering against the ground shock effect of ground-penetrating explosion， it is more appropriate to use the equivalent coupling factor and packing factor. In this paper， the calculation formulas of the equivalent coupling factor and the packing factor of the earth-penetrating nuclear explosion are given.