为了得到最佳罩顶药高,提高聚能装药的破甲威力,设计了7种不同罩顶药高的装药结构,利用有限元软件LS-DYNA对主药柱中的爆轰波传播、射流形成及侵彻靶板过程进行了数值模拟,并与静破甲试验结果进行了比较。随着罩顶药高的增加,侵彻深度呈现出先增加后减小的趋势。因此每种聚能装药结构均存在一个最佳罩顶药高,对于文中数值模拟及试验的装药结构,当药型罩锥角为60°时,最佳罩顶药高为22.5mm。最佳罩顶药高随着锥角的增加而增加,设最佳罩顶药高H₁(opt)=yD。,当锥角a在45°~70°范围内时,y满足拟合得到的多项式:y=1.013–0.0497α+9.63×10¯⁴a²–5.29×10-α³。

In order to get optimal apical charge height for better penetration of the shaped charge(SC) with waveshaper, seven different shaped charges were designed. Compared to three rounds of static penetration experiments, the finite-element code LS-DYNA was used to do the numerical simulation on the detonation wave propagation in the main charge, jet formation and penetrating into RHA target. The result shows that with the apical charge height in the SC increasing, the penetration depth first increases and then decreases and there is an optimum apical charge height in every definite SC. The conclusion is that while liner angle is 60°, the optimum is 22.5mm and with liner angle increasing, the optimum of apical charge height will increase gradually.