基于带隔板装药实现双模转换机理研究

STUDY ON THE TRANSFORMATION MECHANISM OF DUAL-MODE ABOUT THE SHAPED CHARGE WITH A WAVE SHAPER

针对带隔板成型装药结构通过改变单点起爆位置实现双模转换的问题,该文应用爆轰波形成理论分析不同起爆情况下药型罩表面压力变化规律,建立药型罩顶端起爆形成EFP(Explosively Formed Projectile)与装药顶端起爆形成JPC(Jetting Projectile Charge)的爆轰压力理论计算模型,正交优化设计结合LS-DYNA有限元仿真软件计算获得形成较佳双模毁伤元的等壁厚扁平偏心亚半球药型罩参数,并进行了X光成像与侵彻试验研究,其中在13Dk炸高条件下EFP对钢靶的侵深可达0.64Dk,JPC可达2.42Dk。

A shaped charge was produced with a wave shaper that can transform dual-mode penetrators by changing the single-point detonation location. The theory of denotation wave formation was applied to analyze the changes of liner surface pressure in different initiation situations. An analytical model was established for the EFP（Explosively Formed Projectile）formed by denotation at the top of a liner, and for the JPC（Jetting Projectile Charge）formed by denotation at the center of a charge. The ways of orthogonal optimizing design and LS-DYNA finite element simulation software were used to obtain the suitable structural parameters of a uniform-thickness eccentric hemisphere liner, and X-ray imaging and penetration experiments were then conducted. The penetration depth of EFP in a steel target was 0.64Dk（the charge diameter, while that of JPC was 2.42 Dk when the burst height was approximately 13Dk）.