带壳JH-14C传爆药烤燃实验及响应特性数值模拟

肖有才; 王瑞胜; 范晨阳; 张宏; 王志军; 孙毅

doi:10.11883/bzycj-2022-0555

带壳JH-14C传爆药烤燃实验及响应特性数值模拟

doi: 10.11883/bzycj-2022-0555

1.
中北大学机电工程学院，山西太原 030051
2.
西安机电信息技术研究所，陕西西安 710065
3.
中国船舶重工集团公司第七一三研究所，河南郑州 450015
4.
哈尔滨工业大学航天学院航天科学与力学系，黑龙江哈尔滨 150001

基金项目: 国家自然科学基金（11802273）；山西省青年科学基金（201901D211279）

详细信息

作者简介:
肖有才（1988－　），男，博士，副教授， xiaoyoucai@nuc.edu.cn

中图分类号: O381
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- 被引次数: 0
出版历程
- 收稿日期: 2022-12-12
- 修回日期: 2023-05-17
- 网络出版日期: 2023-05-17
- 刊出日期: 2023-07-05

Cook-off experiment on the JH-14C booster explosive with a shell and the relevant numerical simulation

1.
College of Mechatronic Engineering, North University of China, Taiyuan 030051, Shanxi, China
2.
Xi’an Institute of Electromechanical Information Technology, Xi’an 710065, Shaanxi, China
3.
The 713th Research Institute, China State Shipbuilding Corporation Limited, Zhengzhou 450015, Henan, China
4.
Department of Astronautic Science and Mechanics, School of Astronautics Harbin Institute of Technology, Harbin 150001, Heilongjiang, China

摘要

摘要: 为了探究受外部不同温度影响下带壳JH-14C传爆药的响应特性，设计了一套慢速烤燃下可测量JH-14C传爆药温度变化和壳体应变的实验装置，获取了不同升温速率下弹体内部温度随时间变化曲线、慢烤响应过程中装药壳体径向应变历程曲线，揭示了带壳JH-14C传爆药的慢速烤燃响应特性，将烤燃实验中弹体径向应变测试结果和炸药反应烈度相关联，提出了一种弹药烤燃实验反应等级的判定方法；基于热力学和装药化学反应，建立了带壳装药烤燃热传导模型和Arrhenius模型，采用BP神经网络反演了JH-14C传爆药热的热反应参数，对不同升温速率下弹体内部的温度场进行了研究。结果表明：升温速率越低，装药的响应温度越高，响应越剧烈；随着升温速率的降低，炸药的点火区域从炸药两端外缘逐渐向炸药内部转移。
- JH-14C传爆药 /
- 烤燃实验 /
- 烤燃响应 /
- 升温速率 /
- 热反应参数 /
- BP神经网络
Abstract: In order to explore the cook-off response characteristics of the JH-14C booster explosive with a shell under different external temperatures, a set of experimental devices was designed for measuring the cook-off response temperatures at multiple points of the JH-14C booster explosive and for monitoring the deformation of the shell. The explosive temperatures were measured from its edge to its center. The strain-time curves of the shell were recorded by a dynamic strain indicator and a high-temperature strain gauge. The cook-off experiments with the heating rates of 1.0 ℃/min and 3.3 ℃/h were conducted. The temperature was raised at different points of the explosive and the strains at different points of the shell were obtained. The intensity of the shock wave in the process of the slow cook-off experiment is calculated by using the thin-walled cylinder principle, and the violence of the reaction of the JH-14C booster explosive with a shell is quantitatively characterized by using the intensity of blast loading. The response characteristics of the JH-14C booster explosive with a shell in the slow cook-off experiment is revealed. Though the relationship between the shell strain results and the reaction intensities, a method is proposed to describe the reaction level of the JH-14C booster explosive with a shell. Based on the thermodynamics and the chemical reaction of the explosive, the heat conduction model is established. The decomposition reaction of the explosive is described by the Arrhenius equation. A back propagation (BP) neural network is used to invert the heat reaction parameters of the JH-14C booster explosive. Comparison between the experimental and simulated results shows that the presented model can be used to obtain the cook-off response characteristics of the explosive obtained by simulation with high precision. The internal temperature field response of the projectile body is also studied under different heating rates. The results exhibit that the lower the heating rate, the higher the response temperature of the charge and the more intense the reaction. With the decrease of the heating rate, the ignition area of the explosive gradually shifts from the outer edges of both ends to the inside of the explosive.
- JH-14C booster explosive /
- cook-off experiment /
- cook-off response /
- heating rate /
- heat reaction parameter /
- BP neural network

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图 1 烤燃实验系统

Figure 1. Cook-off experimental system

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图 2 烤燃弹实物图、烤燃弹尺寸及温度测点布置

Figure 2. A photo of the cook-off bomb specimen as well as its sizes and the measuring point arrangement

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图 3 JH-14C传爆药细观形貌图

Figure 3. Meso-morphology of the JH-14C booster explosive

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图 4 带壳JH-14C传爆药在1.0 ℃/min和3.3 ℃/h升温速率下各测点的温度历程曲线

Figure 4. The temperature history curves at different measuring points in the JH-14C booster explosive with a shell under the heating rates of 1.0 ℃/min and 3.3 ℃/h

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图 5 3.3 ℃/h升温速率下烤燃结束后回收的实验弹体

Figure 5. The recovered bomb that has undergone cook-off under the heating rate of 3.3 ℃/h

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图 6 1.0 ℃/min和3.3 ℃/h升温速率下烤燃弹体径向应变历程曲线

Figure 6. Radial strain history curves of cook-off bombs under the heating rates of 1.0 ℃/min and 3.3 ℃/h

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图 7 含2层隐含层的BP神经网络

Figure 7. A back-propagation (BP) neural network with two hidden layers

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图 8 在1.0 ℃/min的升温速率下两测点温度的实验值与计算值的比较

Figure 8. Comparison between experimental and calculated temperatures at the two measuring points under the heating rate of 1.0 ℃/min

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图 9 在3.3 ℃/h的升温速率下两测点温度的实验值与计算值的比较

Figure 9. Comparison between experimental and calculated temperatures at the two measuring points under the heating rate of 3.3 ℃/h

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图 10 在1.0 ℃/min的升温速率下烤燃弹体不同测点的温度-时间曲线

Figure 10. Temperature-time curves at different measuring points of the cook-off bomb under the heating rate of 1.0 ℃/min

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图 11 在1.0 ℃/min的升温速率下JH-14C传爆药不同时刻温度分布

Figure 11. Temperature distribution in the JH-14C booster explosive under the heating rate of 1.0 ℃/min at different times

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图 12 不同升温速率下JH14C传爆药各测点的温度-时间曲线

Figure 12. Temperature-time curves of each measuring point in the JH-14C booster explosive under different heating rates

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图 13 不同升温速率下JH-14C传爆药的温度分布

Figure 13. Temperature distribution in the JH-14C booster explosive under different heating rates

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表 1 响应时刻不同测点的温度

Table 1. Temperatures of different measuring points at response times

升温速率	响应温度/℃
升温速率	外壁	测点1	测点2	测点3	测点4	测点5	测点6
1.0 ℃/min	230	241	234	234	243	227	226
3.3 ℃/h	212	215	217	218	221	240	264

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表 2 壳体和炸药的热物理参数^[28-29]

Table 2. Thermophysical parameters of the shell and explosive^[28-29]

材料	密度/ (kg·m⁻³)	比热容/ (J·kg⁻¹·K⁻¹)	导热系数/ (W·m⁻¹·K⁻¹)
35CrMnSi	7850	480	43
JH-14C	1700	1176	0.4644

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表 3 不同升温速率下JH-14C传爆药各测点在响应时刻的温度

Table 3. Temperature of each measuring point in the JH-14C booster explosive at response time under different heating rates

升温速率/(℃·min⁻¹)	响应时间/min	响应温度/℃
升温速率/(℃·min⁻¹)	响应时间/min	外壁	测点1	测点2	测点3	测点4	测点5	测点6
3.0	70.8	235	238	229	229	212	200	199
5.0	43.5	240	230	223	223	195	179	178
9.0	24.8	246	219	211	211	166	141	141
20.0	11.6	254	195	187	187	107	77	77

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