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含能材料  2014 

多层球形预制破片战斗部破片初速场的计算模型

DOI: 10.3969/j.issn.1006-9941.2014.03.006

Keywords: 爆炸力学,战斗部,多层球形预制破片,初速计算,数值模拟

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Abstract:

为描述多层球形预制破片战斗部破片的初速分布,针对典型的柱形装药的多层球形破片结构,用AUTODYN软件对其爆炸驱动过程进行数值模拟,发现每层破片的初速周向规律性波动;每层破片的平均初速外层大于内层,其差异随破片层数的增多和周向破片数的减少而增大;基于Gurney假设和冲量定理进行理论推导,结合数值模拟结果,建立了破片初速场的计算模型。该模型通过给出各层破片的平均初速及初速场的速度极值来表征初速场,其计算值与实验结果吻合较好。

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