基于油气井射孔弹的设计原理,应用LS-DYNA有限元程序,采用ALE方法对某特定结构小锥角聚能装药在不同壁厚变化率的情况下射流形成过程及侵彻双层靶板进行了数值模拟,计算结果表明:采用顶部薄、锥底厚的药型罩,射流速度梯度高,可形成高速细长射流;射流侵彻双层靶板孔径小,剩余速度大;小锥角聚能射流侵彻强度高,药型罩壁厚变化率选0.9%为最佳。

Based on design principle of oil well charge, the LS-DYNA3D finite element analysis software and the arbitrary Lagrange Eulerian (ALE) algorithms were used to simulate the formation process of shaped charge jet and penetration of double-layer target under different varying rate of clad the results show that the liner of thin tip and thick bottom enhance the gradient of jet velocity, and has the ability to produce high velocity and long jet; The double-layer target penetrated by jet has a small hole. The jet remain high residual velocity formed by shaped charge with small cone angle performs well against target. The optimal varying rate of clad is 0.9%.