一种新型M形顶部结构药型罩的设计及形成射流的侵彻能力分析

在锥角药型罩结构基础上通过改变其顶部结构设计了一种新型M形顶部结构药型罩,并分析了其射流头部的形成机理;采用有限元软件ANSYS/LS-dyna对在爆轰波作用下M形顶部结构药型罩射流的形成过程,以及对45号钢板的侵彻过程进行了数值模拟,并与锥角药型罩、平顶药型罩形成射流的头尾部速度、拉伸长度、杵体大小以及对45号钢板的侵彻能力进行了对比。结果表明,M形顶部结构药型罩的M形顶部结构在爆轰波作用下经二次汇聚形成了射流头部,相同装药条件下,其形成射流的头部速度相比锥角药型罩形成射流的头部速度提高约9.10%,比平顶药型罩形成的射流头部速度提高约5.56%;其侵彻深度比锥角药型罩提高约10.4%,比平顶药型罩提高约7.28%。

Design of A New M-shaped Top Structrue Liner and Analysis of Penetration Ability of Its Jet Formation

Based on the liner structrues of the cone angle, a new liner structure with M-shaped top structure was designed by changing its top structure, and the formation mechanism of its jet head was analyzed.The numerical simulation of jet formationin process of liner with M-shaped top structrue under the action of detonation wave and the penetration process of No.45 steel plate was performed by using the finite element software ANSYS/LS-dyna, and comparison with the head and end velocity, stretching length, slug size and the penetration ability of No.45 steel plate of the jet formed by the cone angle liner and the flat-top liner was performed.The results show that the top structure of the liner with M-shaped top structure forms jet head at two times convergence under the action of detonation wave.Under the same loading condition, compared with the cone angle liner jet-forming head speed, the M-shaped liner jet-forming head speed is increased by about 9.10% and the flat-top liner jet-forming head speed is increased by about 5.56%, its penetration depth is improved by about 10.40% compared with the cone angle liner, its penetration depth is improved by about 7.28% compared with the flat-top liner liner.