摘要
应用LS-DYNA及动态示踪点处理方法,研究典型聚能装药有效射流与药型罩材料的细微分配关系。取临界侵彻速度为2 km/s,将有效射流按速度分布分为高速(v j≥5 km/s),次高速(4 km/s≤v j<5 km/s),中速(3 km/s≤v j<4 km/s)和低速(2 km/s≤v j<3 km/s)4个区间段。结果显示:药型罩的有效区域为一变壁厚的薄壁锥形体,高速段为药型罩顶部内表面往里0.12倍壁厚,其低速段最厚处为药型罩内表面往里0.46倍罩壁厚,距药型罩底端约0.2倍的罩高范围内不形成有效射流。药型罩内表面材料在形成射流时呈渐进分层剥离状,有效区域与药型罩壁厚及质量比例沿罩轴线方向均为指数分布。可为高效聚能装药及复合药型罩研究提供参考。
Explicit finite software LS-DYNA and tracer point method are used to study the nice partition between useful jet and liner material.The useful jet is divided into four sections in terms of velocity distribution,such as high speed（v j ≥5 km/s）,sub-high speed（4 km/s≤v j 5 km / s）,medium speed（3 km/s≤v j 4 km / s） and low speed（2 km / s≤v j 3 km / s）.The result indicates that the useful region of liner is a thin-wall cone with variable thickness along axial direction.The highest speed section of useful jet is nearby the top of liner,and its thickness is 0.12 thickness of liner.The lowest speed section is in the lower part of liner,and its thickness is 0.46 thickness of liner.The material in rang of about 0.2 height from the bottom of liner can not generate useful jet.Liner material is stripped progressively from the inner side of liner in the process of jet forming.The thickness and mass ratios of useful region to liner are of exponential distribution along axial direction of liner.It can offer a reference the design of efficient shaped charge and composite liner.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2013年第8期935-941,共7页
Acta Armamentarii
关键词
兵器科学与技术
聚能装药
药型罩分界面
数值模拟
示踪点
ordnance science and technology
shaped charge
liner partition
numerical simulation
tracer point
作者简介
侯秀成（1978-），男，讲师，博士研究生。E-mail：ty13hxc@bit．edu．cn
蒋建伟（1962-），男，教授，博士生导师。E-mail：bitjjw@bit．edu．cn
