共查询到18条相似文献,搜索用时 140 毫秒
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为了研究炸药成型药柱和粉状炸药撞击感度的差异,利用炸药药柱撞击感度试验装置,对5~10g量级的3种炸药药柱(TNT、Tetryl和钝化RDX)进行了撞击感度试验,分析了炸药种类、药柱高度和药柱温度对炸药药柱撞击感度的影响。结果表明,炸药药柱和粉状炸药的撞击感度趋势基本一致,但炸药药柱的撞击能(E_0)明显大于粉状炸药,对于TNT、Tetryl和钝化RDX 3种炸药,炸药药柱的撞击能与粉状炸药的临界撞击能之比(E_0/E_(50))在2.6~4.9之间;随着药柱高度由10mm增至20mm,Tetryl药柱撞击感度下限(H_0)由40cm增至105cm;药柱的温度也对炸药撞击感度有显著的影响,随着药柱温度由-40℃升至70℃,JO-8药柱撞击感度下限(H_0)由30cm升至50cm;炸药药柱的撞击感度由炸药原材料、炸药药柱的物理与化学性质等多个因素决定。 相似文献
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撞击作用下炸药装药的尺寸效应研究 总被引:7,自引:2,他引:5
利用大型撞击加载装置对不同直径的炸药装药进行了模拟实验 ,分析了撞击作用下药柱直径对其敏感性影响 ,为炸药装药发射安全性研究提供了合适的模拟药柱尺寸 相似文献
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聚奥炸药的机械感度研究 总被引:1,自引:1,他引:0
通过对聚奥炸药造型粉和产品在不同的贮存条件和不同状态机械感度的研究 ,分析了炸药药柱经老化后感度数据增高的原因 ;分析了由解剖药柱经不同工艺方法制备成的试样 ,其机械感度也不同的原因 ;对该炸药的安全使用具有指导意义 相似文献
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乳化炸药撞击感度的测试方法 总被引:2,自引:2,他引:0
建立了一种适应乳化炸药特性的撞击感度测试方法。该方法采用现有的WL-1型落锤仪,在击柱间加石英砂测其特性落高,通过对比不同乳化炸药特性落高值的大小来对比不同乳化炸药的撞击感度。该方法科学可靠.简便易行,可以分辩不同乳化炸药之间的撞击感度差异。试验表明,不同品种不同工厂生产的乳化炸药,其撞击感度可能有较大的差异。 相似文献
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在不同的外界作用影响下引发爆轰时,在炸药中就激发起不同的化学变化。并且由于作用的特点不同,引爆的临界条件也可以由不同的因素所决定。因此通常对炸药的感度问题采用纯经验的方法,即在某些标准条件下根据任何一个间接的指标来决定爆轰引发的临界条件。在测定撞击、摩擦、冲击波引爆等感度时采用的就是这种方法。这些试验得到的结果具有一定的价值,但是它们仅是近似地评价了不同炸药的感度,因为实际上永远也碰不到这些实验中所采取的条件。同时由于表征炸药对不同作用的感度指标是任意选择的,对不同的试验 相似文献
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Richard H. B. Bouma Antoine E. D. M. vanderHeijden 《Propellants, Explosives, Pyrotechnics》2016,41(3):484-493
An explosive composition, derived from AFX‐757, was systematically varied by using three different qualities of Class I RDX. The effect of internal defect structure of the RDX crystal on the shock sensitivity of a polymer bonded explosive is generally accepted (Doherty and Watt, 2008). Here the response to a mechanical non‐shock stimulus is studied using an explosion‐driven deformation test as well as the ballistic impact chamber. No correlation between RDX crystal quality and deformation sensitivity is observed. The DDT behavior (Deflagration to Detonation Transition) of the three plastic bonded explosives, although similar in composition, is distinct regarding the rate of diameter increase in the explosion‐driven deformation test. Recovered polymer bonded explosive from the explosion‐driven deformation test responds equally fast or slower in the ballistic impact chamber. Based on our experimental results the shear rate threshold as a single parameter describing mechanical sensitivity is challenged, and preference is given to the development of an ignition criterion based on inter‐granular sliding friction under the action of a normal pressure. 相似文献
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A. V. Dubovik 《Combustion, Explosion, and Shock Waves》2002,38(6):714-722
A model of mechanical initiation of solid explosives, applicable for analysis of sensitivity of individual substances and composite explosives, is developed. The model includes a system of equations of work softening of a high explosive charge under an impact, resulting dissipative heating, and heat release due to chemical reactions between the components of the explosive mixture. The critical parameters and reaction kinetics were numerically calculated for initiation of charges consisting of a mixture of ammonium perchlorate and polymethylmethacrylate. The results are compared to experimental data on sensitivity of this mixture to the impact. Key words: high explosive, impact, explosion, impact sensitivity. 相似文献
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《Propellants, Explosives, Pyrotechnics》2017,42(7):749-753
The gap test has been used for several decades as a measure for the shock sensitivity of high explosives. Normally the axial pressure in the gap is used as the necessary initiation pressure of a high explosive for a shock to detonation transition. But it has been shown in the past that the pressure in the gap is not a suitable measure for shock sensitivity and other criteria like the James criterion in terms of critical energy fluence and critical specific kinetic energy should be used. To evaluate the James criterion in the 21 mm and 50 mm polymethylmethacrylate (PMMA) gap test numerical simulations are conducted. To validate the simulations a 21 mm water gap test is simulated and compared to experimental results, where the axial pressure calibration can be reproduced with high accuracy. With the results from the simulation of the 21 mm and 50 mm gap test it is shown that at the same maximum axial pressure the energy fluence is higher in the 50 mm gap test. This explains to some extent the higher initiation pressures observed in smaller gap tests. The James criterion is derived and it is shown that the two gap tests probe very different regions in the energy fluence vs. specific kinetic energy plane. The results can be used as a calibration for the gap tests and are intended to improve the comparability of gap test results among each other and with different initiation experiments like flyer or heavy fragment impact testing. 相似文献