共查询到19条相似文献,搜索用时 125 毫秒
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空腔解耦爆炸实验研究的基础理论(Ⅱ) 总被引:2,自引:1,他引:1
空腔解耦爆炸可使远区地震波幅度大大降低 ,国外已在现场和实验室内进行了大量的实验研究 ,但涉及空腔解耦爆炸实验数据分析方法及相关的基础理论知识基本上散布于各文献 ,我们在对国外有关文献调研的基础上 ,较为系统地介绍了空腔解耦爆炸的基础理论知识、实验数据的分析方法及解耦效应的简化分析模型。 相似文献
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空腔解耦爆炸可使远区地震波幅度大大降低 ,国外已在现场和实验室内进行了大量的实验研究 ,但涉及空腔解耦爆炸实验数据分析方法及相关的基础理论知识基本上散布于各文献 ,我们在对国外有关文献调研的基础上 ,较为系统地介绍了空腔解耦爆炸的基础理论知识、实验数据的分析方法及解耦效应的简化分析模型。 相似文献
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对在美国内华达试验场盐岩介质中进行的Salmon 地下核爆试验( 填实爆炸,当量5.3kt,埋深828m) ,利用近区自由场加速度测试数据,计算了它的震源函数t() ,并且根据一维球对称爆炸膨胀源理论,计算了弹性响应空腔爆炸源的震源函数s()。由解耦理论,得到了盐岩介质的完全解耦空腔爆炸的解耦因子DF。 相似文献
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为实现空腔爆炸温度、压力变化趋势的准确测量,基于铠装K型热电偶和压力变送器,建立密闭空腔爆后气体温度、压力测量系统。设计密封隔热防护装置,将传感器的敏感端与信号调理模块分别安装在两个密封腔内,有效提高了传感器在大当量爆炸冲击条件下的存活率。在0.86m/kg1/3比距离密闭空腔大当量爆炸条件下,对传感器及防护装置的性能进行考核验证,爆后测量采集到了有效的气体温度及压力变化历程,且传感器状态能够最终恢复至正常状态。测试结果表明,使用密封隔热安装的K型热电偶和压力变送器可以满足小比距离密闭空腔爆后气体静态温度、压力测量需求。 相似文献
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The scaling and similarity laws concerning the propagation of isolated spherical blast waves are briefly reviewed. Both point
source explosions and high pressure gas explosions are considered. Test data on blast overpressure from the interaction and
coalescence of spherical blast waves emanating from explosives in the form of shaped charges of different strength placed
in the vicinity of a solid propellant stack are presented. These data are discussed with regard to the scaling laws concerning
the decay of blast overpressure. The results point out the possibility of detecting source explosions from far-field pressure
measurements.
相似文献
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O. K. Sommersel D. Bjerketvedt S. O. Christensen O. Krest K. Vaagsaether 《Shock Waves》2008,18(4):291-297
This paper describes application of a background oriented schlieren technique in order to obtain quantitative measurements
of shock waves from explosions by processing high speed digital video recordings. The technique is illustrated by an analysis
of two explosions, a high explosive test and a hydrogen gas explosion test. The visualization of the shock front is utilized
to calculate the shock Mach number, leading to a predicted shock front pressure. For high explosives the method agreed quite
well with a standard curve for side-on shock pressures. In the case of the gas explosion test we can also show that the shock
front is non-spherical. It should be possible to develop this technique to investigate external blast waves and external explosions
from vented gas explosions in more details.
This paper is based on work that was presented at the 21th International Colloquium on the Dynamics of Explosions and Reactive
Systems, Poitiers, France, July 23–27, 2007. 相似文献
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The propagation phenomenon of a detonation wave is particularly interesting, because the detonation wave is composed of a
3D shock wave system accompanied by a reaction front. Thus, the passage of a detonation wave draws cellular patterns on a
soot-covered plate. The pressure and temperature behind the detonation wave are extremely high and may cause serious damages
around the wave. Therefore, it is of great significance from a safety-engineering point of view to decay the detonation wave
with a short distance from the origin. In the present study, experiments using high-speed schlieren photography are conducted
in order to investigate the behaviors of the detonation wave diffracting from two slits. The detonation wave produced in a
stoichiometric mixture of hydrogen and oxygen is propagated through the slits, and the behaviors behind the slit-plate are
investigated experimentally. When a detonation wave diffracts from the slits, a shock wave is decoupled with a reaction front.
Since the two shock waves propagate from the slits interact with each other at the center behind the plate, the detonation
wave is reinitiated by generating a hot-spot sufficient to cause local explosions. Furthermore, it is clarified that the shock
wave reflected from a tube-wall is also capable of reinitiating the detonation wave. The reinitiation distance of the detonation
wave from the slit-plate is correlated using a number of cells emerged from each slit.
相似文献
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针对当前地下爆炸物理模型实验无法模拟大当量地下爆炸抛掷弹坑和疏松鼓包现象的难题,基于相似理论,采用地下爆炸效应真空室模型实验方法,研制了考虑重力影响的大当量地下爆炸效应模拟实验装置。整套装置由容器罐体、快开门密闭机构、爆源系统、真空泵组、量测控制系统等组成,提出的新型爆源模拟装置可以实现精确起爆控制。该装置可模拟0.1~100 kt TNT、埋深20~400 m范围内不同比尺的地下核爆炸成坑和隆起实验,同时也能够模拟不同装药配置方案、不同地质条件下的大当量地下浅埋化爆抛掷实验。典型的核爆抛掷成坑模型实验结果表明,装置实验参数精确可调,实验过程可控,实验结果可信,为钻地核武器地下爆炸毁伤效应分析和大型工程爆破效果预测预报提供了实验室模拟和科学研究设备,填补了爆炸离心机无法模拟大当量地下爆炸抛掷成坑效应的空白。 相似文献
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触、近水面爆炸自由场冲击波特性的试验研究 总被引:1,自引:0,他引:1
本文通过药量为0.05kg至32kgTNT的触、近水面化爆试验,介绍了空中、水中冲击波的测量方法和传播特性,并总结出一些计算冲击波参数的实用的经验公式。 相似文献
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针对当前大当量地下爆炸真空室模拟试验中爆源起爆方式高度依赖火药制品等问题,基于地下爆炸相似理论和二级气炮原理,自主研制了二级高压驱动阵列弹珠同步弹射微型爆源装置。装置利用二级高压气体驱动弹珠同步击碎玻璃球壳,释放球内高压气体,以模拟真实爆炸气体生成物的推出。整套爆源装置的发射参数:高压气室充气压力4 MPa,玻璃球壳内残余稳态气体压力约为3 kPa,能够用于0~20 kt当量地下爆炸成坑效应的真空室模拟。爆源适用性试验验证表明,该爆源装置的爆破机制和爆破效果满足大当量地下抛掷爆炸真空室模拟试验的功能需求,且具有较高的安全性、可控性和可操作性,为开展相关模拟试验提供了新的技术方法。 相似文献
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泄爆过程中外部爆炸现象的实验研究 总被引:1,自引:0,他引:1
采用压力测量与YA-16
高速阴影系统同步测量方法,对柱型容器内甲烷-空气混合气体的燃烧及泄爆过程进行实验
研究. 获得正常泄爆和发生外部爆炸(也称二次爆炸)时泄爆外流场压力-时间曲线和流场
阴影照片. 结果表明:泄爆过程中发生外部爆炸的典型特征为, 在压力-时间曲线上,破膜激
波形成的第一个压力峰值后出现外部爆炸形成的第二个压力峰值,在流场阴影照片上,破膜
激波后有第二道爆炸波出现. 相似文献