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针对药型罩结构优化设计问题,对刻槽式药型罩MEFP成型的影响进行研究,分析了药型罩曲率半径和刻槽深度对MEEP发散角和速度的影响。为提高预控破片战斗部的杀伤威力,利用LS-DYNA软件,采用拉格朗日的方法,对药型罩曲率半径和刻槽深度两种参数进行了数值仿真。得到结构参数对MEFP发散角的影响规律。结果证明,刻槽药型罩能按照预期目的形成有一定质量和发散角的9个独立子EFP,刻槽深度对MEFP的影响最为显著,且存在一个最佳值h/δ=0.5使各子EFP具有较大的发散角和侵彻速度;并可以通过适当增大药型罩曲率半径来增大子EFP的发散角,获得符合技术要求的MEFP战斗部。
In order to optimize the design of the medical mask structure, the influence of the MEFP of the grooved medical mask was studied. The influence of the radius of curvature and depth of the medical mask on the divergence angle and velocity of the MEEP was analyzed. In order to improve the killing power of the prefabricated fragment warhead, the LS-DYNA software and the Lagrange method were used to simulate the radius and groove depth of the medicine cover. The influence of structure parameters on the divergence angle of MEFP is obtained. The results show that the groove-shaped medicine cover can form nine independent sub-EFPs with a certain quality and divergence angle according to the intended purpose. The depth of the groove has the most significant effect on the MEFP, and there exists an optimum value h / δ = 0.5, EFP has a larger divergence angle and penetration speed; and by appropriately increasing the radius of curvature of the medicine cover, the divergence angle of the sub-EFP can be increased to obtain the MEFP warhead meeting the technical requirements.