长方体单腔室空腔环境内爆炸效应的实验研究

胡洋; 朱建芳; 朱锴

doi:10.11883/1001-1455(2016)03-0340-07

长方体单腔室空腔环境内爆炸效应的实验研究

doi: 10.11883/1001-1455(2016)03-0340-07

华北科技学院安全工程学院矿井灾害防治重点实验室，北京 101601

基金项目:

华北科技学院创新团队项目 3142015021

华北科技学院创新团队项目 3142014124

爆炸科学与技术国家重点实验室开放基金项目 KFJJ15-15M

详细信息

作者简介:
胡洋(1979—)，男，博士，讲师，28770007@qq.com

中图分类号: O381
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- 被引次数: 0
出版历程
- 收稿日期: 2015-03-25
- 修回日期: 2015-09-15
- 刊出日期: 2016-05-25

Experimental study on explosion effect in a closed single rectangular cavity

Key Laborary of Mine Disaster Prevention and Control, Safety Engineering College, North China Institute of Science and Technology, Beijing 101601, China

摘要

摘要: 为了获得在典型空腔内发生爆炸后，结构壁面上爆炸载荷的分布规律和空腔结构的破坏形式，以国防工事和人防工事的等级设计规范为依据，设计了长方体单腔室空腔模型，并对该模型进行了药量逐渐递增直至可使结构破坏的内爆炸实验。用压力传感器和加速度传感器分别记录了单腔室壁面上爆炸载荷的压力时程曲线和结构壁面振动的加速度时程曲线，分析了壁面上爆炸载荷的分布规律以及模型结构的破坏形式，并将首个峰值的实测数据与理论计算和数值模拟结果进行了对比，探讨了3种研究方法产生误差的原因。
- 爆炸力学 /
- 爆炸效应 /
- 内爆炸 /
- 典型空腔
Abstract: According to the design specifications of national defense works and human defense works, a closed single rectangular cavity model was developed to obtain the explosion load distribution at the walls of typical cavities and the corresponding destruction forms resulted from the explosion inside the cavities. The developed cavity model was applied to carry out internal explosion experiments, in which the mass of the TNT charge was increased gradually until the cavity model could be damaged. Pressure and acceleration sensors were used to record the explosion pressure-time curves and the vibration acceleration-time curves at the cavity walls, respectively. And the explosion load distributions at the cavity walls and the destruction form of the model structure were analyzed. The first peaks of the measured data were compared with the results of theoretical calculation and numerical simulation to discuss the cause for the errors among the three methods.
- mechanics of explosion /
- explosion effect /
- internal explosion /
- typical cavity

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图 1 密闭腔室结构尺寸(单位为mm)

Figure 1. The geometry size of a closed chamer (unit in mm)

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图 2 浇筑前的实验模型

Figure 2. The experimental model before pouring

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图 3 观测点即压力传感器安装具体位置示意图(单位为mm)

Figure 3. Schematic layout of pressure sensors (observation points) (unit in mm)

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图 4 实验药柱实物实物图

Figure 4. A photo of experimental explosive charges

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5(a) 观测点1的实测冲击波波形

5(a). Overpressure-time curves of shock waves measured at observation point 1

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5(b) 观测点2的实测冲击波波形

5(b). Overpressure-time curves of shock waves measured at observation point 2

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5(c) 观测点3的实测冲击波波形

5(c). Overpressure-time curves of shock waves measured at observation point 3

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5(d) 观测点4的实测冲击波波形

5(d). Overpressure-time curves of shock waves measured at observation point 4

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5(e) 观测点5的实测冲击波波形

5(e). Overpressure-time curves of shock waves measured at observation point 5

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图 6 200 g装药爆炸后结构模型的破坏情况

Figure 6. Destruction of the model after explosion of 200 g TNT

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图 7 75 g装药爆炸后不同观测点的加速度时程曲线

Figure 7. Acceleration-time curves at different observation points after explosion of 75 g TNT

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表 1 结构壁面纵向钢筋参数

Table 1. Reinforcement parameters of longitudinal wall

p_{s, e}/MPa	a/m	b/m	c/m	S/dm²	l/m	F/MN	f/MPa	d/mm	n	δ	k/mm
1.2	3	1.5	1.5	450	9	5.4	400	14	88	1	102
1.2	3	1.5	1.5	450	9	5.4	400	14	88	2	204

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表 2 5个观测点首次反射的理论计算、数值模拟及实测结果的比较

Table 2. Comparison among theoretical calculation, numerical simulation and experimental results for the first reflection at five observation points

W/g	方法	p/MPa
W/g	方法	观测点1	观测点2	观测点3	观测点4	观测点5
	理论计算	1.059	0.164	0.441	0.135	0.135
75	数值模拟	0.752	0.103	0.304	0.094	0.091
	实验平均值	1.154	0.165	0.450	0.107	0.148
	理论计算	2.212	0.285	0.836	0.225	0.229
150	数值模拟	1.553	0.183	0.574	0.146	0.157
	实验平均值	1.960	0.263	0.804	0.181	0.450
	理论计算	3.025	0.367	1.108	0.282	0.290
200	数值模拟	2.102	0.234	0.754	0.176	0.201
	实验平均值	2.104	0.336	0.556	0.346	0.759

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