有效射流结构模式的数值模拟

侯秀成; 蒋建伟; 陈智刚

doi:10.11883/1001-1455(2014)01-0035-06

有效射流结构模式的数值模拟

doi: 10.11883/1001-1455(2014)01-0035-06

侯秀成^{1, 2},
蒋建伟^1, ,,
陈智刚²

1.
北京理工大学爆炸科学与技术国家重点实验室，北京 100081
2.
中北大学机电工程学院，山西太原 030051

详细信息

作者简介:
侯秀成(1978—), 男, 博士研究生, 讲师

通讯作者:
Jiang Jian-wei, bitjjw@bit.edu.cn

中图分类号: O385; TJ410.33
计量
- 文章访问数: 3203
- HTML全文浏览量: 327
- PDF下载量: 414
- 被引次数: 0
出版历程
- 收稿日期: 2012-07-16
- 修回日期: 2012-12-17
- 刊出日期: 2014-01-25

Numerical simulation on structure modules of effective jet

1.
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
2.
College of Mechatronic Engineering, North University of China, Taiyuan 030051, Shanxi, China

摘要

摘要: 应用LS-DYNA程序及示踪点信息后处理方法，将典型小锥角药型罩沿母线方向分为4段，研究其微元在炸药爆炸驱动下的运动规律及有效射流结构模式。射流形成并稳定后，将罩质材料按速度大小分为6段，得到各段结构组成模式。结果表明，有效射流高速段由药型罩顶部材料组成，次高速段及中速段由罩中部及中下部材料组成，靠近罩底部约0.25倍罩高范围内的材料不形成射流，有效射流段为初始材料微元的管状分层分布形结构。
- 爆炸力学 /
- 结构模式 /
- 示踪点 /
- 有效射流 /
- 药型罩 /
- LS-DYNA程序
Abstract: The typical copper liner with a small cone angle was divided into four sections along the bus direction via the explicit finite software LS-DYNA, and the tracer point method was used to study the movement of the liner element and the structure modules of the effective metallic jet.The result indicates that the liner material may be divided into six sections by velocity interval after the jet formation and stabilization.The highest-velocity section is made of the top material inside the liner, and the mid-higher velocity section and the mid-velocity section made of the middle and lower half material inside the liner, respectively.In the height range of about 0.25times as high as the liner height away from the liner bottom, the liner material can not become effective jets.And the initial material elements of the liner are distributed as tubular in the effective jet.
- mechanics of explosion /
- structure module /
- tracer point /
- effective jet /
- liner /
- LS-DYNA

HTML全文

图 1 射流的动态示踪点示意图

Figure 1. Free tracer point of effective jet

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图 2 射流的静态示踪点示意图

Figure 2. Fixed tracer point of effective jet

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图 3 药型罩微元分段处理

Figure 3. Liner divided into sections

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图 4 药型罩内外表面材料示踪点轨迹

Figure 4. Trace line of tracer points at liner surface

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图 5 药型罩材料微元运动规律及相互作用关系

Figure 5. Moving pattern and interaction of material sections of liner

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图 6 分段切割罩杵体回收结果

Figure 6. Recovered slugs of sectional liner

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图 7 有效射流头部速度变化及速度分布曲线

Figure 7. Tip velocity and velocity distribution of effective jet

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图 8 有效射流及杵体的结构组成

Figure 8. Composition module of effective jet and slug

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