泄压口大小对约束空间爆炸准静态超压载荷的影响规律

徐维铮; 吴卫国

doi:10.11858/gywlxb.2017.05.016

泄压口大小对约束空间爆炸准静态超压载荷的影响规律

doi: 10.11858/gywlxb.2017.05.016

徐维铮^{1, 2,},
吴卫国^{1, 2}

1.
武汉理工大学高性能舰船技术教育部重点实验室，湖北武汉 430063
2.
武汉理工大学交通学院船舶、海洋与结构工程系，湖北武汉 430063

基金项目:

国家自然科学基金 51409202

国防基础研究项目 B1420133057

中央高校基本科研业务费 2016-YB-016

详细信息

作者简介:
徐维铮(1991—)，男，博士研究生，主要从事约束空间炸药爆炸波数值计算方法及三维程序开发研究.E-mail:xuweizheng@whut.edu.cn

中图分类号: O354.5
计量
- 文章访问数: 7582
- HTML全文浏览量: 3148
- PDF下载量: 203
出版历程
- 收稿日期: 2016-11-17
- 修回日期: 2017-01-19

Effects of Size of Venting Holes on the Characteristics of Quasi-Static Overpressure in Confined Space

XU Wei-Zheng^{1, 2
,},
WU Wei-Guo^{1, 2}

1.
Key Laboratory of High Performance Ship Technology of Ministry of Education, Wuhan University of Technology, Wuhan 430063, China
2.
Departments of Naval Architecture, Ocean and Structural Engineering, School of Transportation, Wuhan University of Technology, Wuhan 430063, China

摘要

摘要: 约束空间爆炸载荷主要包含瞬态冲击波和持续时间较长的准静态超压，为了研究泄压口大小对约束空间爆炸准静态超压载荷的影响规律，采用三阶WENO有限差分格式，编写了约束空间内炸药爆炸冲击波三维数值计算程序。利用Sod激波管、双爆轰波碰撞、激波与熵波相互作用等经典算例验证了数值程序的可靠性。基于验证的程序开展了带有泄压口的约束空间内爆炸载荷数值计算。在分析数值计算结果基础上，提出了描述准静态超压载荷简化理论公式，该理论公式与数值计算结果吻合较好。研究结果可为工程抗爆结构设计提供一定的参考和指导。
- 约束空间爆炸 /
- 三阶WENO格式 /
- 数值计算 /
- 准静态超压载荷 /
- 简化理论公式
Abstract: The blast load generated by energetic materials in a confined space consists mainly of transient shock waves and the long-lasting quasi-static overpressure.In order to investigate the effects of the size of venting holes on the characteristics of the quasi-static overpressure in a confined space, a 3D high resolution hydro-code was developed in the present work implementing the third-order WENO scheme based on the FORTRAN platform.First, the problems of the Sod shock tube, the interacting blast wave and the shock entropy wave interaction were simulated to validate the code.Then, the validated code was used to simulate the blast waves generated by condensed explosives in a confined space.A simplified analytical model was proposed to describe the quasi-static overpressure, which agreed well with the simulation results.The research done in this paper can be used to provide reliable input load for the design of anti-explosion engineering structures.
- confined space explosion /
- third-order WENO scheme /
- numerical simulation /
- quasi-static overpressure /
- simplified analytical model

HTML全文

图 1 计算结束后压力曲线

Figure 1. Pressure curve at the final time

下载: 全尺寸图片幻灯片

图 2 爆炸箱体及测点布置图(单位：mm)

Figure 2. Blast chamber and arrangement of measuring points (Unit:mm)

下载: 全尺寸图片幻灯片

图 3 爆炸初场及网格分布

Figure 3. Initial condition and mesh distribution

下载: 全尺寸图片幻灯片

图 4 不同泄压口边长爆炸初期压力分布云图

Figure 4. Pressure field distribution of venting holes in different sizes

下载: 全尺寸图片幻灯片

图 5 不同泄压口边长、不同测点处爆炸载荷曲线

Figure 5. Blast load curves for different sizes of venting holes at all the gauging points

下载: 全尺寸图片幻灯片

图 6 不同泄压口边长测点3超压及冲量时间历程曲线

Figure 6. Blast load time histories of gauging point No.3 for different sizes of venting holes

下载: 全尺寸图片幻灯片

图 7 不同泄压口边长测点3准静态超压拟合曲线图

Figure 7. Fitted curves of quasi-static overpressure of gauging point No.3 for different sizes of venting holes

下载: 全尺寸图片幻灯片

图 8 -b与S/V^2/3关系的拟合曲线

Figure 8. Fitted curve of -b and S/V^2/3

下载: 全尺寸图片幻灯片

图 9 不同泄压口边长准静态超压载荷理论与数值计算对比

Figure 9. Comparisons of quasi-static overpressure between theoretical solution and simulational results for different cases

下载: 全尺寸图片幻灯片

表 1 -b与S/V^2/3数据

Table 1. Data of -b and S/V^2/3

-b	S/V^2/3
0.0	0.0
6.797 1	0.005 8
21.145 0	0.023 3
68.604 0	0.093 2
238.389 3	0.372 7

下载: 导出CSV

参考文献(13)

[1]	BAKER W E, OLDHAM G A.Estimates of blowdown of quasi-static pressures in vented chambers [R].San Antonio, TX: Southwest Research Institute, 1975.
[2]	ESPARZA E D, BAKER W E, OLDHAM G A.Blast pressures inside and outside suppressive structures [R].San Antonio, TX: Southwest Research Institute, 1975.
[3]	KEENAN W A, TANCRETO J E.Blast environment from fully and partially vented explosions in cubicles [R]. Dover, NJ: Department of the Army Picatinny Arsenal, 1975.
[4]	ANDERSON C E, BAKER W E, WAUTERS D K, et al.Quasi-static pressure, duration, and impulse for explosions (e.g.HE) in structures [J].Int J Mechan Sci, 1983, 25(6):455-464. doi: 10.1016/0020-7403(83)90059-0
[5]	EDRI I, SAVIR Z, FELDGUN V R, et al.On blast pressure analysis due to a partially confined explosion:Ⅰ.experimental studies [J].Int J Protect Struct, 2011, 2(1):1-20. doi: 10.1260/2041-4196.2.1.1
[6]	WU C, LUKASZEWICZ M, SCHEBELLA K, et al.Experimental and numerical investigation of confined explosion in a blast chamber [J].J Loss Prevent Proc Ind, 2013, 26(4):737-750. doi: 10.1016/j.jlp.2013.02.001
[7]	FELDGUN V R, KARINSKI Y S, EDRI I, et al.On blast pressure analysis due to a partially confined explosion:Ⅱ.numerical studies [J].Int J Protect Struct, 2012, 3(1):61-80. doi: 10.1260/2041-4196.3.1.61
[8]	LIU X D, OSHER S, CHAN T.Weighted essentially non-oscillatory schemes [J].J Comput Phys, 1994, 115(1):200-212. doi: 10.1006/jcph.1994.1187
[9]	JIANG G S, SHU C W.Efficient implementation of weighted ENO schemes [J].J Comput Phys, 1996, 126(1):202-228. doi: 10.1006/jcph.1996.0130
[10]	SHU C W.Essentially non-oscillatory and weighted essentially non-oscillatory schemes for hyperbolic conservation laws [R].Hampton, VA: Institute for Computer Applications in Science and Engineering (ICASE), 1997: 325-432.
[11]	SHU C W.High order weighted essentially nonoscillatory schemes for convection dominated problems [J].Siam Rev, 2009, 51(1):82-126. doi: 10.1137/070679065
[12]	SHU C W, OSHER S.Efficient implementation of essentially non-oscillatory shock-capturing schemes [J].J Comput Phys, 1988, 77(2):439-471. doi: 10.1016/0021-9991(88)90177-5
[13]	FELDGUN V R, KARINSKI Y S, EDRI I, et al.Prediction of the quasi-static pressure in confined and partially confined explosions and its application to blast response simulation of flexible structures [J].Int J Impact Eng, 2016, 90(15):46-60. http://www.sciencedirect.com/science/article/pii/S0734743X15300087