共查询到18条相似文献,搜索用时 343 毫秒
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含铝炸药水中爆炸能量输出结构 总被引:7,自引:4,他引:7
通过测定、计算、分析不同类型炸药水中爆炸能量输出参数,揭示了不同类型炸药在水中爆炸能量输出特性,分析了高威力含铝炸药组成铝氧比对水中爆炸能量输出结构的影响。研究结果表明,在一定的对比距离上,当铝氧比为0.35—0.40时,水中爆炸冲击波能达到最高;当铝氧比增大到1.00时,其水中爆炸的气泡能接近最大值。这种方法可使水中爆炸装置能量输出结构与爆炸目标的易损性相匹配,借以提高温炸毁伤效果。 相似文献
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将RDX基铝纤维炸药和RDX基含铝炸药进行水下爆炸实验,得到两种炸药在不同位置的压力-时程曲线,经过计算得到两种炸药水下爆炸的能量,并以含铝炸药的能量为铝纤维炸药的参考能量,分析两者的差异及造成差异的原因。结果表明,与含铝炸药相比,铝纤维炸药的压力峰值与冲量降低,铝纤维炸药的比冲击波能降低11%~22%,比气泡能降低11%~15%,比爆炸能降低11%~18%。铝纤维炸药的比爆炸能占爆热的73%~82%,低于含铝粉炸药比爆炸能与爆热的比值(89%~94%)。铝纤维炸药能量未达到其参考能量的主要原因是铝纤维直径较大导致反应不充分以及熔喷法制成的铝纤维中Al2O3含量较高。 相似文献
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为研究炸药爆轰参数与空中爆炸冲击波超压之间的关系,设计了不同铝含量的RDX/Al、HMX/Al混合炸药,并进行了空中爆炸试验。根据爆炸相似理论,用相同条件下实测TNT超压数据,计算了冲击波超压的TNT当量。采用不同方法计算了炸药的爆轰参数。结果表明,炸药空中爆炸冲击波超压与爆热、爆容和爆速乘积TNT当量的1/3次方满足线性关系,且回归线在y轴上的截距为0,斜率与炸药的类型有关。对于TNT,斜率为1;对于RDX/Al混合炸药,斜率为1.053(R2=0.9996);对HMX/Al混合炸药,斜率为1.073(R2=0.9995),表明炸药的爆热、爆速和爆容对空中爆炸冲击波超压的影响相同。 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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RDX基含铝炸药水中爆炸近场冲击波特性 总被引:2,自引:1,他引:1
通过水中爆炸试验,得到了RDX基含铝炸药在不同比例距离((-R))处的水中冲击波峰值压力、冲量和冲击波能.结果表明,在测试范围内,(-R)<1.5 m/kg1/3,Al的质量分数为10%~20%时,冲击波峰值压力基本不变;(-R)≥1.5 m/kg1/3时,Al的质量分数为0~30%时,冲击波峰值压力基本不变.测试范围内,Al的质量分数为20%~30%时,冲量基本不变;Al的质量分数小于20%,冲量随Al含量的增加不断增大.(-R)<1.0 m/kg1/3时,冲击波能随比例距离的增加而不断衰减;(-R)≥1.0 m/kg1/3时,冲击波能随比例距离的增加基本保持不变.(-R)=0.79 m/kg1/3(药柱18倍半径处)时,冲击波能量利用率只有25%左右,初始冲击波能损失了近1/2~3/5. 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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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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为了提高乳化炸药的爆炸威力,研制出了一种MgH2型复合敏化储氢乳化炸药。该乳化炸药采用包覆后的MgH2与玻璃微球复合敏化,两种材料分别起到含能添加剂和敏化剂的作用。通过研究“热点”数量和包覆材料对炸药爆轰性能的影响,确定了MgH2型复合敏化储氢乳化炸药的配方。利用水下爆炸实验和猛度实验,研究了MgH2型复合敏化储氢乳化炸药的爆轰特征参数和水下爆炸特性。实验结果表明,MgH2型复合敏化储氢乳化炸药的铅柱压缩量为24.3 mm,达到军用炸药的猛度;与传统玻璃微球型乳化炸药相比,其水下爆炸峰值压力虽然下降了4.90%,但比冲击波能、比气泡能和总能量分别提高了7.83%、22.94%和18.32%。MgH2型复合敏化储氢乳化炸药的猛度和做功能力得到了显著提高。 相似文献
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In order to understand the reaction kinetics of HMX/AP/Al ternary system, the different distribution of AP in HMX/AP/Al explosives was realized by two different preparation techniques. Detonation test results show that the detonation velocity, explosion heat and detonation pressure of HAP samples are higher than those of HAl samples, but the extent of improvement is not high, not more than 5 %. The results of scanning electron microscopy showed that AP in HAP samples was distributed on the surface of HMX crystal. AP were dispersed around HMX crystals in HAl samples. The experimental results of explosive fireball performance show that the fireball expansion speed of HAP samples is better than that of HAl samples, demonstrating a good fireball effect. Underwater test results show that the shock wave peak pressure and bubble pulsation period of HAP samples increase by 3.06 % and 7.95 % respectively, and shock wave energy and bubble energy increase by 9.8 % and 25.42 % compared with bubble energy. The experimental results show that HAP samples are superior to HAl samples in accelerating ability of Al flies. The dispersion of AP on the HMX crystal surface promotes the energy release of HMX/AP/Al explosives more. 相似文献
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In order to improve the explosion characteristics of emulsion explosives, titanium hydride was added to emulsion explosives to produce a new type of hydrogen storage emulsion explosives. Charges with different contents of titanium hydride were evaluated through underwater explosion experiments and detonation velocity tests. The tests on underwater explosion and detonation velocity reveal that compared to pure emulsion explosives, the detonation parameters of emulsion explosives containing titanium hydride showed a trend of first increasing and then decreasing. When the mass ratio of titanium hydride in the emulsion explosive is 1 % to 3 %, all detonation parameters have been improved to a certain extent. When the mass ratio of titanium hydride in the emulsion explosive is 3 % to 10 %, only part of the detonation parameters (specific impulse, specific shock energy, specific total energy and volume energy density) has been improved. The maximum increase of specific impulse, specific shock energy, specific total energy and volume energy density of emulsion explosive containing titanium hydride is 7.06 %, 8.95 %, 3.97 % and 8.22 %, respectively. Based on the analysis, it is evident that though powdered TiH2 participates in the detonation reaction process of the emulsion explosive, the majority of TiH2′s energy is released during the secondary reaction occurring after the detonation wave front. Therefore, the detonation performance of emulsion explosives can be effectively improved by adding a certain mass ratio of titanium hydride. 相似文献
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为了研究铝粉粒度对乳化炸药水下爆炸能量输出的影响,在相同乳化炸药中分别添加3种不同粒度的铝粉制得含铝乳化炸药。利用水下爆炸实验,获得冲击波压力时程曲线,经分析计算得到峰值压力、冲击波冲量、比冲击波能、比气泡能、总能量等水下爆炸能量参数。并运用DSC-TG联用技术测试添加不同粒度铝粉的乳化炸药在不同升温速率下的热安定性。结果表明:铝粉粒度对乳化炸药水下爆炸的能量有较大的影响,添加了中粒度(平均粒度为177.2 μm)铝粉的乳化炸药各能量参数均达到最大值,而3组样品的热安定性则随着铝粉粒度的减小而降低,活化能的最大降幅达3.7%。 相似文献
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An underwater explosion test is used to determine the detonation properties of metallized explosives containing aluminum and boron powders. An oxygen bomb calorimeter (PARR 6200 calorimeter, Parr Instrument Company, USA) is used to obtain the heat of combustion of the metal mixtures. As the content of boron powders is increased, the heat of combustion of the metal mixtures increases, and the combustion efficiency of boron decreases. The highest value of the combustion heat is 38.2181 MJ/kg, with the boron content of 40%. All metallized explosive compositions (RDX/Al/B/AP) have higher detonation energy (including higher shock wave energy and bubble energy) in water than the TNT charge. The highest total useful energy is 6.821 MJ/kg, with the boron content of 10%. It is 3.4% higher than the total energy of the RDX/Al/AP composition, and it is 2.1 times higher than the TNT equivalent. 相似文献