药型罩和药柱不对称对线型聚能射流侵彻性能的影响

The Effect of Asymmetry between Liner and Charge on the Penetration Performance of Linear Shaped Charge Jet

针对线型聚能装药制造过程中常见的药型罩和药柱不同轴情况,采用侵彻试验,结合有限元软件对非对称线型聚能装药射流的形成和侵彻进行了三维数值模拟。研究结果显示对于此结构和尺寸的线型聚能装药,当药型罩轴线与装药轴线偏移距离为1mm时,侵彻宽度增加了12%,侵彻深度相比对称情况降低了约58%。当药型罩与聚能装药的偏离距离为1mm,且同时存在5°的夹角时,射流侵彻形成三个主体切槽,开坑宽度为17.4mm,侵彻深度比对称情况降低了74%。随着药型罩和装药不对称程度的增加,射流在靶板上的侵彻宽度以及侵彻中心偏移装药轴线的距离增加,穿深降低。

The asymmetric linear shaped charges （LSC） were fired at RHA armor steel, and the experimental results were presented. The jet formation and penetration were simulated with finite-element code LS-DYNA3D. For the linear shaped charge configuration, it is suggested that at the eccentric distance between liner and charge is lmm, the cratering width increases by 12.2%, while the penetration depth decreases by 58% , compared with the symmetric LSC. When the eccentric distance between liner and charge is lmm, and the comer between the two axes is 5° , the LSC jet loses its 74% penetration capability. The cratering width increases with the asymmetric extent, while the penetration depth decreases.