大长径比熔铸装药热芯棒凝固工艺优化仿真

岳晓媛; 张会锁; 韩雪莲; 刘红利; 王彦杰; 刘恒著; 刘鹏飞; 曹红松

doi:10.11858/gywlxb.20200592

大长径比熔铸装药热芯棒凝固工艺优化仿真

doi: 10.11858/gywlxb.20200592

岳晓媛^{1, 2,},
张会锁^{1, 2,*, ,},
韩雪莲^{2, 3},
刘红利^{2, 3},
王彦杰^{2, 3},
刘恒著¹,
刘鹏飞¹,
曹红松¹

1.
中北大学机电工程学院，山西太原　030051
2.
先进装药技术协同创新中心，山西太原　030051
3.
山西江阳化工有限公司，山西太原　030041

详细信息

作者简介:
岳晓媛（1996－），女，硕士研究生，主要从事装药仿真优化研究. E-mail：xyyue3863@126.com

通讯作者:
张会锁（1976－），男，博士，副教授，主要从事弹箭虚拟设计及智能化技术研究. E-mail：13653513620@139.com

中图分类号: O482.2; TJ410.6
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出版历程
- 收稿日期: 2020-07-13
- 修回日期: 2020-07-25

Process of Improved Hot Mandrel for Large Length-Diameter Ratio Warhead Melting Cast

YUE Xiaoyuan^{1, 2
,},
ZHANG Huisuo^{1, 2,*
, ,},
HAN Xuelian^{2, 3},
LIU Hongli^{2, 3},
WANG Yanjie^{2, 3},
LIU Hengzhu¹,
LIU Pengfei¹,
CAO Hongsong¹

1.
College of Mechanical and Electrical Engineering, North University of China, Taiyuan 030051, Shanxi, China
2.
Collaborative Innovation Center for Advanced Charging Technology, Taiyuan 030051, Shanxi, China
3.
Shanxi Jiangyang Chemical Co., Ltd., Taiyuan 030041, Shanxi, China

摘要

摘要: 为提高大长径比战斗部的熔铸装药质量，采用有限元仿真方法建立了三维装药模型，对熔铸装药过程进行数值模拟。通过分析传统铸装和热芯棒工艺铸装的仿真结果，结合缩孔形成原因和传统热芯棒工艺对装药质量的改善机理，设计出一种多层次优化温度控制的热芯棒，并对改良热芯棒工艺铸装过程进行数值模拟，预测热芯棒改良工艺对装药质量的影响。结果表明：传统热芯棒铸装工艺无法改变药柱径向凝固顺序，在药室宽大处仍然会出现缩孔缩松的疵病，而改良热芯棒工艺通过改善药柱凝固顺序，可以预防缩孔缩松出现，达到了预期要求。
- 熔铸装药 /
- 缩孔缩松 /
- 热芯棒 /
- 凝固工艺
Abstract: In order to improve melt-casting charge quality of the warhead with a large length-diameter ratio, a three-dimensional charge model was established by means of the finite element simulation method, and numerical simulation on the melt-casting charge process was carried out, including traditional casting and hot mandrel process casting. Then combined with the shrinkage principle and mechanism of the traditional hot mandrel process to improve charge quality, a multi-layered hot mandrel with optimized temperature controlling was proposed and its casting process simulation was undertaken to predict how it exerts effects on the charge quality. The results show that the radial solidification order of the grains can’t be changed and shrinkage as well as porosity would appear at the wider area of the explosive room in the traditional hot mandrel casting process. However, the defects of shrinkage and porosity can be avoided by changing the radial solidification order in the improved hot mandrel process, which just corresponds to our expectation.
- melt-casting charge /
- shrinkage and porosity /
- hot mandrel /
- solidification process

HTML全文

图 1 熔铸装药模型

Figure 1. Melt-casting charge model

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图 2 装药缺陷对比

Figure 2. Comparison of charge defects

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图 3 熔铸装药后处理云图

Figure 3. Post-processing cloud image of melt-casting charge

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图 4 4个测温点位置

Figure 4. Location of four temperature measurement points

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图 5 测温点温度-时间曲线

Figure 5. Temperature-time curves of temperature measurement points

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图 6 传统热芯棒工艺铸装模型

Figure 6. Casting model of traditional hot mandrel process

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图 7 热芯棒工艺铸装后处理云图

Figure 7. Hot mandrel process casting andpost-processing cloud image

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图 8 多层次热芯棒系统组成

Figure 8. Composition of layered hot mandrel system

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图 9 改良热芯棒工艺铸装模型

Figure 9. Casting model of improved hot mandrel process

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图 10 改良热芯棒工艺铸装缩松率云图

Figure 10. Cloud image of casting shrinkage rate of the improved hot mandrel process

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图 11 改良热芯棒工艺铸装凝固时间云图

Figure 11. Time cloud image of casting solidification of the improved hot mandrel process

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图 12 改良后测温点温度-时间曲线

Figure 12. Temperature-time curves of temperature measurement points for improved hot mandrel

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表 1 材料的热物性参数^[18-20]

Table 1. Thermo-physical parameters of the materials^[18-20]

Material	$\theta\rm{_m} $/℃	L/(kJ·kg^–1)	C/(J·kg^–1·K^–1)	$\,\rho $/(g·cm^–3)	$\,\mu$/(Pa·s)	$\alpha $/K^–1
Explosive B	78–80	33.5	1 063 (25 ℃) 1 276 (50 ℃) 1 573 (75 ℃) 1 481 (85 ℃) 1 427 (90 ℃) 1 035 (100 ℃)	1.680	0.31 (83 ℃) 0.27 (90 ℃) 0.27 (95 ℃)	7.69 × 10^–5 (23 ℃) 2.00 × 10^–5 (50 ℃) 5.00 × 10^–6 (75 ℃) 1.00 × 10^–6 (80 ℃)
							H13 steel	0.73	7.800	4.45 × 10^–8 (22–500 ℃)
							Al	0.90	7.625

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表 2 热芯棒位移-时间关系

Table 2. Displacement-time relationship of the hot mandrel

t/s	x/mm
0	0
5	600
500	600
1 000	0

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