内部爆炸作用下钢箱结构变形规律性实验

姚术健; 张舵; 郑监; 卢芳云; 于大鹏

doi:10.11883/1001-1455(2017)05-0964-05

内部爆炸作用下钢箱结构变形规律性实验

doi: 10.11883/1001-1455(2017)05-0964-05

国防科学技术大学理学院，湖南长沙 410073

基金项目:

国家自然科学基金项目 11132012

详细信息

作者简介:
姚术健(1988—)，男，博士研究生

通讯作者:
卢芳云, fangyunlu@126.com

中图分类号: O383;TU511
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- 被引次数: 0
出版历程
- 收稿日期: 2016-01-11
- 修回日期: 2016-06-07
- 刊出日期: 2017-09-25

Experimental study of deformation of steel boxsubjected to internal blast loading

College of Science, National University of Defense Technology, Changsha 410073, Hunan, China

摘要

摘要: 箱型结构内部爆炸能够造成比空爆更严重的破坏效果。本文中设计了3个边长600 mm、板厚4 mm的实验试件，并分别用98.4、194.7和355.8 g的TNT炸药进行了内部爆炸实验，得到了所有试件的变形特征。箱体壁板的变形都呈现向外凸出(鼓起)的特点，壁板中心的最终挠度随着爆炸TNT当量的增大而近似成线性增长，拟合了箱体壁板挠厚比与爆炸当量之间的经验公式。通过三维数字图像相关技术，得到了箱体壁板的动态响应过程：爆炸发生后，壁板中心最先产生向外鼓起；壁板中心随后变形增长，同时变形向四周传播；壁板中心变形达到最大值后，板的变形会产生一定量的振荡回缩。
- 变形规律 /
- 数字图像相关 /
- 钢箱结构 /
- 内部爆炸
Abstract: Damage could occur to a more severe degree in an internal blast than in an air blast with respect to box-shaped structures. In the present study, a blast experiment was performed using 98.4, 194.7 and 355.8 g TNT explosives, respectively on three box-shaped specimens 600 mm in length and 4 mm in plate-thickness, to obtain their deformation features and observe the outward bulges at the center of their plate wall. It was found that the central deflection of the wall increases with the increase of the TNT mass. An empirical equation is proposed by fitting the linear relationship of the deflection thickness ratio and the TNT mass. The dynamic response of the wall was analyzed using the 3D digital image correlation (DIC) technique. The outward bulge was produced in the wall center after the explosion and at the same time the deflection increased with time passing by and the deformation propagated towards the wall edge all around. After the deflection reached the maximum value, the deformation of the wall experienced several oscillations.
- plastic deformation feature /
- digital image correlation /
- steel box /
- internal blast

HTML全文

图 1 钢箱试件设计模型

Figure 1. Design model of steel box specimen

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图 2 钢箱试件模型

Figure 2. Model of steel box specimen

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图 3 TNT形状及尺寸

Figure 3. Shape and dimension of TNT explosive

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图 4 不同工况下的破坏形状

Figure 4. Damage figures of different experimental cases

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图 5 壁面中心挠厚比与爆炸比例距离的关系

Figure 5. Relationship between central deflection thickness ratioand scale distance

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图 6 DIC技术测得的壁面中心挠度

Figure 6. Central deflection obtained by DIC technique

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图 7 钢箱壁面动态变形三维DIC技术测试结果

Figure 7. DIC measured results of dynamic response of steel box wall

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表 1 实验工况和结果

Table 1. Experimental cases and results

工况	a/mm	m/g	Z/(m·kg^-1/3)	δ_e/mm	δ_c/mm
1	40	98.443	1.299	32.93	33.44
2	50	194.689	1.035	53.33	52.56
3	60	355.800	0.847	78.04	78.32

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