Open AccessThe analysis of the equivalent bare charge of aluminum cased charge exploding in confined space
Author(s) -
Hu Zhou,
Xiangshao Kong,
Zheng Cheng,
Weiguo Wu
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1507/3/032008
Subject(s) - detonation , blast wave , deflection (physics) , aluminium , mechanics , materials science , charge (physics) , shell (structure) , shock wave , space charge , structural engineering , shaped charge , air blast , warhead , explosive material , composite material , physics , chemistry , classical mechanics , engineering , electron , nuclear physics , mining engineering , organic chemistry , quantum mechanics
The blast loadings from a cased charge, which include a cluster of fragments and shock waves, would cause severe damage to the structures, especially in the scenario of a confined space. In this paper, experiments of the dynamic response of steel plates subjected to the confined blast loading from a cased charge were performed, in which two set warhead models of aluminum cased TNT charge were employed. By using the explicit dynamic code AUTODYN and the Smoothed Particle Hydrodynamic (SPH) method, the rapture process of the aluminum shell was reproduced and the equivalent bare charge was determined by analyzing the results from numerical simulations. In addition, the dynamic response of steel plates subjected to confined blast loadings from cased charges were calculated numerically. Then, the method for calculating the equivalent bare charge that related to the deflection of blast loaded plates was proposed. In addition, this method was further used to determine the approximate mass of TNT charge that contributing to the blast loading of shock wave and subsequent quasi-static pressure in the confined space, in which the energy released by the burning of the detonation products and aluminum shell were taken into account. The present paper presented a reliable method to analyze the response of steel plates under confined blast loadings from a cased charge, which would be useful in the design of the protective structures.