为研究爆炸成型横向效应增强型侵彻体(爆炸成型PELE)的形成规律,基于一种中心点起爆的包覆式复合药型罩战斗部结构,采用AUTODYN数值模拟软件计算爆炸成型PELE形成过程; 运用图像处理技术,提取侵彻体形成后的边界并计算出密实度作为衡量侵彻体形成优劣的评价依据,获得了药型罩材料、结构以及装药长径比对爆炸成型PELE形成性能的影响规律。结果 表明,在中心点起爆条件下,采用变壁厚结构铁外罩、等壁厚结构铝内罩组合方式,内外罩顶厚度比为2:3、装药长径比为0.5时,可获得密实度较高的爆炸成型PELE,其结构参数为:外罩内、外曲率半径分别为1.00D和1.15D,外罩顶厚度为0.06D,内罩内、外曲率半径均为0.42D,内罩顶厚度为0.04D。
A warhead structure of clad composite liner was selected to research the formation rule of explosively formed lateral effect enhanced penetrator(explosively formed PELE)under center point initiation and the forming process of PELE was calculated using AUTODYN numerical simulation software. The boundary of the formed penetrator was extracted and the compactness was calculated through image processing technology, which was used as the evaluation basis for the penetrator formation. The influences of the liner material, structure and the length to diameter ratio of the charge on the forming performance of the explosively formed PELE were obtained. The results show that a high compactness explosively formed PELE can be obtained under central point initiation in the premise of adopting the combination of variable wall thickness structure iron outer cover and equal wall thickness structure aluminum inner cover with the thickness ratio of inner and outer cover top of 2:3, and when the length to diameter ratio of charge is 0.5. Its structure parameters are as follows: the inner and outer curvature radius of the outer liner of PELE are 1.00D and 1.15D, respectively, and the top thickness is 0.06D. The inner and outer curve radius of inner liner are both 0.42D, and the top thickness is 0.04D.
