Effect of blast height and penetration angle on blasting cutting performance of shaped charge jetcord

DOI:	10.11809/bqzbgcxb2023.12.013
Keywords:	shaped energy cutting cable; height of burst; penetration angle; penetration depth; numerical simulation
Abstract:	In order to study the comprehensive influence of blast height and penetration Angle on the cutting performance of the jetcord, one 20 millimeter thick ZL114A aluminum alloy plate was used as the target plate, and the simulation study of cutting ZL114A aluminum alloy target plate under 30 working conditions from 0 to 4mm blast height and 0 to 25° penetration angle was carried out by arrangement and combination method. Results show: On the surface, the penetration depth of the jetcord shaped jet increases gradually and then decreases rapidly with the increase of blast height. The penetration Angle is larger, the attenuation rate is faster. Penetration depth decreases with the increase of penetration Angle, especially when the Angle is greater than 10°. The greater the blast height, the more obvious the impact of penetration Angle on jet penetration depth. When the penetration Angle of the jetcord shaped jet increases, the optimal blast height decreases. In this paper, the optimal blast height of the cutting cable at 25° penetration Angle changes from 3 mm to 2 mm. The comprehensive influence of blast height and penetration Angle on shaped jet penetration depth is greater than the superposition of two separate influences, which makes jet penetration depth decay faster. Especially, when the blast height is greater than 3 millimeter and the penetration Angle is greater than 20°, the comprehensive influence of blast height and penetration Angle makes shaped jet penetration depth obviously smaller than the superposition of two separate effects.
Issue:	Vol. 44 No. 12 (2023)
Published:	2023-12-28
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