初始堆积对发射药床底部挤压应力的影响

王燕; 芮筱亭; 宋振东; 黎超; 姜世平; 冯宾宾; 王国平

doi:10.11883/1001-1455(2014)05-0560-07

初始堆积对发射药床底部挤压应力的影响

doi: 10.11883/1001-1455(2014)05-0560-07

1.
南京理工大学发射动力学研究所，江苏南京 210094
2.
总装备部通保部军械局，北京 100720

基金项目: 国家自然科学基金项目（11102089）；高校博士点基金项目（20113219110025）；新世纪优秀人才支持计划项目（NCET-10-0075）；江苏省博士研究生科研创新培养基金项目（CXZZ12＿0216）

详细信息

作者简介:
王燕(1986—), 女, 博士研究生

中图分类号: O383
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- 被引次数: 0
出版历程
- 收稿日期: 2013-04-01
- 修回日期: 2013-05-27
- 刊出日期: 2014-09-25

Effect of original packing on compression stress at the bottom of propellant bed

1.
Institute of Launch Dynamics, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
2.
Bureau of Ordnance, General Equipment Support Department of General Equipment Headquaters, Beijing 100720, China

摘要

摘要: 为给发射装药发射安全性的评估提供关键数据，对不同初始堆积发射药床进行了挤压破碎实验，测得了发射药床底部的挤压应力。利用离散单元法，建立了发射装药挤压破碎动力学模型，对发射药床的挤压应力进行了计算。实验结果和计算结果吻合较好。随机堆积药床底部的挤压应力较一致，竖排堆积药床底部的挤压应力差异较大。
- 爆炸力学 /
- 挤压应力 /
- 动态挤压 /
- 发射药床 /
- 初始堆积
Abstract: To provide the key data for evaluating the launch safety of propellant charge, dynamic compression fracture experiments were carried out for the propellant charges with different original packing modes.And the corresponding compression stresses at the bottoms of the propellant beds were obtained under the same loadings.By using the discrete element method, a dynamics model was proposed to simulate the compression fracture of the propellant charges.And the simulated compression stresses were in agreement with the experimental ones.The random packing mode did not obviously affect the compression stresses at the bottoms of the propellant beds, but when the propellants were packed in the plumb mode, the compression stresses at the bottoms of the propellant beds were markedly different.
- mechanics of explosion /
- compression stress /
- dynamics compression /
- propellant bed /
- original packing

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图 1 发射装药动态挤压破碎实验装置

Figure 1. Schematic of dynamic compression fracture experimental device

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图 2 发射药床底部挤压应力时间曲线

Figure 2. Comparison of stress at the bottom between dynamic compression fracture and shot experiment

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图 3 不同初始堆积的发射药床

Figure 3. Propellant beds with different packing

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图 4 随机堆积和竖排堆积药床底部挤压应力时间曲线

Figure 4. Comparison of compression stress at the bottom between different-packed propellant beds

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图 5 力学模型

Figure 5. Mechanics model

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图 6 实测作用于活塞上的燃烧室压力时间曲线

Figure 6. Histories of the pressure lodaing on burning chamber in experiment

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图 7 随机堆积和竖排堆积的发射药床初始构型

Figure 7. Initial models of different-packed propellant beds

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图 8 随机堆积和竖排堆积的发射药床离散模型

Figure 8. Discrete models of different-packed propellant beds

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图 9 坐标系及单元接触情况

Figure 9. Coordinate system and contact status of elements

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图 10 球体单元接触模型

Figure 10. Contact model of spherical bodies

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图 11 随机堆积药床底部挤压应力时间曲线

Figure 11. Comparison of compression stress at the bottom with random-packed propellant beds between simulation and experiment

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图 12 竖排堆积药床底部挤压应力时间曲线

Figure 12. Comparison of compression stress at the bottom with plumb-packed propellant beds between simulation and experiment

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表 1 不同初始堆积的药床动态挤压破碎实验结果

Table 1. Experimental results of compression stress under different-packed propellant beds

发序	p_max/MPa	p_s/MPa
1	30.48	13.16
2	30.15	12.95
3	30.34	14.31
4	30.42	16.74
5	30.21	14.72
6	30.43	14.12
7	30.17	31.12
8	30.18	31.34

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表 2 计算参数

Table 2. Simulation parameters

ρ/(kg·m^-3)	r/mm	E/GPa	ν	F_s/kN	F_c/kN	F_v/kN	μ	Δt/μs	t/ms
1.65×10³	0.15	1.0	0.26	1.2	3.6	1.5	0.1	1	3.5

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