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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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《火炸药学报》2017,(6)
为研究混合炸药分子间相互作用,从分子水平确定两组分的力学性能和安全性最佳的混合质量比,采用分子动力学方法和密度泛函理论,模拟不同配比下六硝基六氮杂异伍兹烷(ε-CL-20)主要生长面和1-甲基-4,5-二硝基咪唑(MDNI)混合炸药的结合能、力学性能和径向分布函数(RDF)等,并计算了其理论爆轰性能。结果表明,当CL-20质量分数为60%~65%时,CL-20/MDNI的结合能最大,两组分的相容性和稳定性最好,且CL-20的(1 0 1)面与MDNI分子间作用最强;CL-20和MDNI质量比为65∶35时,混合炸药体积模量(K)、剪切模量(G)和拉伸模量(E)最小,K/G值最大,此时混合炸药的力学性能最好;CL-20和MDNI分子间作用主要是CL-20中H和MDNI中O以及CL-20中O和MDNI中H形成的氢键;电子密度拓扑分析进一步证明,CL-20/MDNI之间存在氢键作用。CL-20质量分数为65%时,该混合炸药理论爆速和爆压分别为8 382m/s和31.87GPa。 相似文献
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浇注PBX炸药老化过程中交联密度与力学性能的关系 总被引:1,自引:0,他引:1
为分析浇注PBX炸药交联密度与力学性能的关系,在70℃时对浇注PBX炸药样品进行高温加速老化试验,对比分析了平衡溶胀法和核磁共振(NMR)法测定交联密度的差异,研究了其在常温时的抗拉强度(σm)、抗压强度(σb)、压缩率(εb)、抗剪强度(τ)、硬度(SH)与黏结剂母体凝胶分数(G)、交联密度(ve)之间的关系。用动态热机械分析仪(DMA)分析了不同老化时间下样品损耗因子tanδ和黏弹系数的变化规律。结果表明,PBX炸药样品的交联密度在老化初期增加,老化中期略有降低,老化后期又增加;NMR法因其测试简单、快捷,精确度高、试样非破坏性等优点,可以作为今后浇注PBX炸药交联密度表征方法的一个重要发展方向;样品老化过程中,浇注PBX炸药样品的交联密度与各力学性能的变化呈线性相关,其力学损耗降低的原因是黏结剂母体的G和v_e增加,浇注PBX炸药的降解和交联是由黏结剂母体结构变化引起。 相似文献
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FOX-7和RDX基含铝炸药的冲击起爆特性 总被引:1,自引:0,他引:1
为研究FOX-7和RDX基含铝炸药的冲击起爆特性,对其进行了冲击波感度试验和冲击起爆试验,结合冲击波在铝隔板中的衰减特性,确定了FOX-7和RDX基含铝炸药的临界隔板值和临界起爆压力,并通过锰铜压阻传感器记录了起爆至稳定爆轰过程压力历程的变化。结果表明,以Φ40mm×50mm的JH-14为主发装药时,FOX-7和RDX基含铝炸药临界隔板值分别为37.51和34.51mm,对应的临界起爆压力为10.91和11.94GPa;起爆压力为11.58GPa时,FOX-7炸药的到爆轰距离为25.49~30.46mm,稳定爆轰后的爆轰压力为27.68GPa,爆轰速度为8 063m/s;起爆压力为14.18GPa时,RDX基含铝炸药的到爆轰距离为17.27~23.53mm,稳定爆轰后的爆轰压力为17.16GPa,爆轰速度为6 261m/s。 相似文献
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《火炸药学报》2017,(6)
为探索硼铝复合粉在热固PBX中的应用,以HMX为基,加入氧化剂高氯酸铵(AP)、硼铝复合粉和聚氨酯黏结剂,设计和制备了6种配方的含硼铝炸药;分别制备3种带壳体及3种不带壳体的Φ50mm含硼铝炸药柱;用弹簧探针法测试了无壳体药柱和带壳体药柱的爆速,分别用经验公式和相对凹坑深度法计算了爆压,讨论了硼铝复合粉含量对其爆轰性能的影响。结果表明,炸药GH-4、GH-5和GH-6用手工浇注成型,Φ50mm×150mm炸药柱密度在1.530~1.570g/cm3之间,爆速在6.900~7.400mm/μs之间,爆压约19GPa,适用于含硼铝炸药配方筛选;炸药PF-1、PF-2和PF-3用真空振动浇注成型,Φ50mm×110mm炸药柱密度约1.693g/cm3,爆速在7.800~8.000mm/μs之间,爆压约24GPa。炸药PF-3中含质量分数20%、硼铝质量比1∶1的复合粉,含金属炸药的组合效应使少量硼铝复合粉在反应区参加反应,其爆速和爆压值较其他配方高,表明弹簧探针法可作为炸药爆速测试的一种补充电测法,在无法实施铜箔探针法的情况下,可以考虑用弹簧探针法。 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
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Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
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The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003 相似文献
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醋酸纤维素取代基分布与性质的关系 总被引:9,自引:0,他引:9
分析了以吡啶为溶剂的醋酸纤维素的13C-NMR核磁共振谱,得出了三种不同位置羟基的取代度。结合X—射线和DSC分析,初步说明具有相同取代度但未经水解和经过水解的醋酸纤维素(CA) 性质上的差异是由于三个羟基上的取代度分布不同及消晶程度差异所致。 相似文献
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1 INTRODUCTIONBecause of importance of equations of state (EOS)in science and industry,hundreds forms of EOS havebeen presented since latter 19th century.It seems impossible to develop a general equation covering vari-ous kinds of EOS.But for cubic EOS,several generalequations have been reported already. Martin presented the first general equation whichis following p=RT/V-α(T)/(υ β)(υ γ) δ(T)/υ(υ β)(υ γ) (1) Kumar et a1.presented an equation called the most general form of a density-cubic or, alterna tively,volume-cubic mathematical equation,the form of which is as follows 相似文献