共查询到20条相似文献,搜索用时 156 毫秒
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设计了一种由多层钢药盒构成的火药颗粒床装药结构。用有限元软件ANSYS/LS-DYNA模拟了试验弹侵彻混凝土过程。在数值模拟基础上,进行了试验战斗部侵彻混凝土试验。结果表明,装药结构的抗侵彻过载能力达到30 000~40 000g,即在高过载作用下,药盒自身可承受火药和药盒自身的高过载力,满足结构抗侵彻高过载的要求。此装药结构在小颗粒火药侵彻过程中能保持其良好的整体性和安定性。试验结果与数值模拟计算结果一致,表明该装药结构设计方案是合理的,可应用在传统战斗部内火药颗粒床装药的结构设计中。 相似文献
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燃料空气炸药武器威力评价指标研究 总被引:7,自引:0,他引:7
在对既有的燃料空气炸药(FAE)武器威力评价方法进行分类评价的基础上,结合FAE武器的爆炸场特性,综合考虑该武器的各种爆炸作用形式,兼顾科学与实用的原则,提出了FAE武器自身威力评价的具体方法。研究表明,用FAE爆轰能和广义TNT当量两个指标来评价FAE武器自身威力能全面反映FAE武器爆炸场特性,适合于FAE武器间的威力对比以及FAE武器与HE武器的威力对比,该评价方法具有普适性。 相似文献
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轴向高过载下固体推进剂结构完整性数值模拟 总被引:3,自引:0,他引:3
利用动力学有限元软件对轴向高过载状态下固体推进剂小变形时结构完整性进行了数值模拟。结果表明,最大轴向应力及应变均发生在固体推进剂和发动机接触区,周向及径向应力较小,但周向应变却相当可观。 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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A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%. 相似文献
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塔设备改造选型的分析 总被引:2,自引:0,他引:2
就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后,着重介绍一种新型塔板(导向梯形浮阀塔板)和一种新型填料(波环填料——乾隆帕克)。 相似文献