共查询到19条相似文献,搜索用时 109 毫秒
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为了研究硝酸酯对RDX基含铝炸药驱动能力的影响,采用圆筒试验研究了含硝酸酯的RDX基含铝炸药加速圆筒壁膨胀速度和格尼能的变化过程,并与不含硝酸酯的RDX基含铝炸药进行了对比,分析了硝酸酯对炸药能量释放特性及金属驱动能力的影响。结果表明,硝酸酯可改善RDX基含铝炸药的铝氧比,改变其反应速率;在反应初期,含硝酸酯的RDX基炸药加速筒壁的速度低于不含硝酸酯的炸药,而在爆炸反应中后期,含硝酸酯的RDX基炸药加速筒壁的速度以及格尼能均高于不含硝酸酯的炸药;含硝酸酯的RDX基含铝炸药的能量释放特性使其适合用于破片战斗部中,可提高其金属驱动能力。 相似文献
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TATB基含铝炸药作功能力的试验研究 总被引:1,自引:0,他引:1
为评价TATB基含铝炸药的作功能力,通过ANSYS-LSDYNS软件,采用Lee-Tarver点火增长三项式模型模拟含铝炸药的圆筒试验,获得了含铝炸药的JWL状态方程及反应速率参数。利用激光位移干涉仪研究了不同铝粉尺寸的含铝炸药加速铜飞片的能力,用数值计算验证了标定的圆筒试验参数。结果表明,粒径较小的铝粉能够使铜飞片获得更大的自由面速度,加速铜飞片的时间缩短,表现为粒径2μm铝粉的含铝炸药反应时间比粒径10μm铝粉的含铝炸药缩短13.6%。计算值与试验结果吻合较好,表明圆筒试验得到的爆轰产物参数是有效的。 相似文献
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不同直径含铝炸药的作功能力 总被引:4,自引:3,他引:1
为具体考察不同直径含铝炸药能量释放过程偏离相似律的程度,采用高速转镜扫描相机及单狭缝扫描技术对两种不同直径(50和100mm)的含铝炸药进行了圆筒试验,扫描狭缝分别距圆筒尾端200mm(直径为50mm)和300mm(直径为100mm)。试验结果表明,在几何相似膨胀位置处,直径为i00mm圆筒试验相对于直径为50mm圆筒试验的壁膨胀速度偏离量约为5%,比动能偏离量约为11%,表明两种直径含铝炸药的圆筒壁膨胀速度不符合相似律,小尺寸圆筒试验将低估大尺寸含铝炸药的作功能力。 相似文献
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通过分析金属柱壳在内部炸药滑移爆轰作用下的动力学响应,建立了爆轰产物压力与壳体径向膨胀位移、材料动态屈服强度之间的关系式。基于Taylor假定确定了壳体完全破裂时爆轰产物压力的阈值。以两种具有相近格尼系数的RDX基含铝炸药为例,对该模型的适用性进行了验证。结果表明,相同壳体下,与无硝酸酯的RDX基含铝炸药相比,含硝酸酯的RDX基含铝炸药的驱动能量利用率具有明显优势。当壳体材料动态屈服强度从0.2GPa增至0.8GPa时,其有效作功能的相对增量约从7.5%迅速增大至15.2%,符合战斗部实际应用中的趋势,表明该分析模型可用于非理想炸药驱动作功性能的综合评价。 相似文献
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DNTF基熔铸炸药的性能研究 总被引:21,自引:12,他引:21
通过相图分析,研究了DNTF/TNT作为液相载体炸药的可能性,并对DNTF/TNT、DNTF/TNT/HMX以及DNTF/TNT/HMX/A1体系的典型配方进行了能量表征和讨论。结果表明,DNTF基熔铸炸药是一种很有前途的高能混合炸药,可满足多种武器装药的高威力要求。 相似文献
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Mou‐Jin Lin Hong‐Hao Ma Zhao‐Wu Shen Xiao‐Zhi Wan 《Propellants, Explosives, Pyrotechnics》2014,39(2):230-235
In order to analyze the effect of aluminum fiber contents on the underwater explosion performance of RDX‐based explosives, the pressure‐time curves of composite explosives with different aluminum fiber contents are measured by underwater explosion experiments. Peak pressure, impulse, shock energy, and bubble energy were obtained by analyzing the curves. The results show that the peak pressures of composite explosives decrease with increasing aluminum fiber contents. The shock impulse of the 30 % aluminum fiber composite explosive is the highest in all composite explosives. The effects of the 20 % and 40 % composite explosives are nearly equal to that of the 30 % explosive, and the different values of shock impulse among them do not exceed 5 %. The specific shock energy of the 20 % aluminum fiber composite explosive is the highest in all composite explosives. The bubble energy and explosion energy of composite explosives increase with increasing aluminum fiber contents. 相似文献
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通过建立“理想混合炸药”模型 ,发现理想混合炸药的爆速 Did与纯组分炸药的爆速 Di和质量分数 Wi之间存在着定量关系 ,据此发展了一种计算混合炸药爆速的新方法。对大量混合炸药的计算结果表明 ,爆速计算值与实验值的一致性令人满意 ,平均误差 1.37%。本文方法的提出 ,不仅提供了一种预测混合炸药爆速的方法 ,而且对高爆速混合炸药的研究具有一定的指导意义 相似文献
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为了减少铝粉炸药在生产过程中因铝粉对环境污染,降低铝粉炸药的撞击感度,提高含铝炸药的成型性及力学性能,将RDX用铝薄膜分层包裹得到新型的铝薄膜混合炸药。将铝薄膜混合炸药与铝粉炸药进行水下爆炸实验与爆速实验,得到两种炸药的爆速与压力时程曲线,经过分析计算得到两种炸药的压力峰值、冲量、冲击波能、气泡脉动周期与气泡能。结果表明:铝薄膜炸药药柱的轴向为RDX与铝薄膜独立贯通的结构,有利于降低混合炸药中添加物对基体炸药爆轰波传播的影响,从而使铝薄膜混合炸药的爆速高于铝粉炸药,导致铝薄膜炸药的冲击波损失系数高于铝粉炸药,使铝薄膜混合炸药的总能量、比气泡能与铝粉炸药相当情况下,其比冲击波能却降低了10.16%~10.33%,计算过程说明铝薄膜混合炸药的C-J压力计算公式具有合理性。 相似文献
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为研究铝粉对乳化炸药作功能力的影响,在负氧平衡的乳化炸药中分别添加不同含量和粒径的铝粉,采用测时仪法测定其爆速;通过水下爆炸实验计算出含铝乳化炸药的比冲击波能、比气泡能和总能量等参数。结果表明,当铝粉(粒径为5μm和35μm)质量分数为5%时,含铝乳化炸药的爆速最大,分别为5 128、5 071m/s;当铝粉(粒径为5μm和35μm)质量分数为20%时,乳化炸药的比冲击波能、比气泡能、总能量均随着铅粉含量的增加而增大,比冲击波能分别增加19.7%、15.3%;比气泡能分别增加12.6%、13.7%,总能量分别增加15.1%、14.5%。 相似文献
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以典型一次引爆型云爆剂为基础,根据炸药的热化学理论和爆轰理论,对一次引爆型云爆剂的爆速进行了理论分析和计算,并研究了组分配比及配方对爆速的影响.结果表明,一次引爆型云爆剂的理论爆速与金属粉含量有关,在一定范围内适当增加金属粉含量,可以提高爆速,且金属粉的热值越高,其一次引爆型云爆剂理论爆速也越高. 相似文献
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S. V. Fedorov 《Combustion, Explosion, and Shock Waves》2005,41(2):232-239
The accumulation of microdamage due to intense plastic deformation results in a decrease in the average density of high-velocity elements formed by explosive compression of shaped metal liners. For compaction of such elements in tests of the reliability of meteoroid protection, it is suggested that the elements be exposed to a magnetic field produced on their motion trajectory before interaction with a target. The physical processes occurring in a conducting elastoplastic porous cylinder placed in a magnetic field were studied by numerical modeling. The model was used to determine the parameters of magnetic-pulse action necessary for compaction of steel and aluminum elements.__________Translated from Fizika Goreniya i Vzryva, Vol. 41, No. 2, pp. 126–134, March–April, 2005. 相似文献
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Robert Maty Svatopluk Zeman Waldemar Trzciski Stanisaw Cudzio 《Propellants, Explosives, Pyrotechnics》2008,33(4):296-300
The detonation velocity and performance were determined for four mixtures of triacetone triperoxide (3,3,6,6,9,9‐hexamethyl‐1,2,4,5,7,8‐hexoxonane, TATP), ammonium nitrate (AN) and water (W) by cylinder expansion tests. The composition of these mixtures varied in the following ranges: 21–31% TATP, 37–54% AN and 19–32% W. The obtained results were compared with those of powdery 2,4,6‐trinitrotoluene (TNT), AN‐fuel oil explosive (ANFO) and emulsion explosive. It was found that the tested TATP/AN/W mixtures represent typical non‐ideal explosives with relatively low critical diameter and with high sensitivity to initiation despite the high content of water due to the presence of the primary explosive (TATP). The detonation velocity is comparable to that of powdery TNT (at similar density). However, the acceleration ability is significantly lower than that of powdery TNT. 相似文献
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Xiao-Li Zhang Jin-Xiang Wang Yu-Xin Sun Jia-Cong Liu 《Combustion, Explosion, and Shock Waves》2009,45(2):230-235
Metallic glass particle reinforced Al-based and (Al-Ni)-based metal matrix composites are obtained by explosive compaction
of powders. These composites contain no Mach holes, cracks, or other obvious defects. The mass fraction of the amorphous phase
is varied from 5 to 20%. The x-ray diffraction and differential thermal analysis of the composite specimens show that the
amorphous phase is maintained in the composites without crystallization during the compaction. Furthermore, photographs of
the composites obtained on a scanning electron microscope show that the metallic glass particles are uniformly distributed
in the matrix. Compared to monolithic aluminum, the composites have a higher Rockwell hardness proportional to the mass fraction
of the reinforcing amorphous phase.
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Translated from Fizika Goreniya i Vzryva, Vol. 45, No. 2, pp. 137–142, March–April, 2009. 相似文献