炸高与侵彻角度对聚能切割索爆破切割性能的影响

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

为研究炸高与侵彻角度对切割索切割性能的综合影响,采用20 mm厚的ZL114A铝合金平板作为靶板,通过排列组合方式,开展了切割索在0~4 mm炸高、0~25°侵彻角度共30种工况下切割ZL114A铝合金靶板的仿真研究。结果表明:切割索射流侵彻深度随炸高增大先逐渐增加后迅速减小,当侵彻角度越大时,侵彻深度的衰减速度越快;射流侵彻深度随侵彻角度的增大而减小,特别是当角度大于10°时,衰减尤为明显,当炸高越大时,侵彻角度对射流侵彻深度的影响越明显。随着切割索射流侵彻角度的增大,其最佳炸高会逐渐减小,使用的切割索在25°侵彻角度下的最佳炸高由3 mm减小为2 mm。炸高与侵彻角度对射流侵彻深度的综合影响大于2种因素单独影响的叠加,使射流侵彻深度衰减的更快,特别是当炸高大于3 mm、侵彻角度大于20°时,炸高与侵彻角度的综合影响使射流侵彻深度开始明显小于2种因素单独作用的叠加。

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.