共查询到20条相似文献,搜索用时 145 毫秒
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利用动力分析软件ANSYS/LS-DYNA模拟研究水下爆破破冰过程中爆炸冲击波压力的作用特征和传播规律,对比分析在冰体覆盖的相对封闭条件和常规水下爆炸时水中压力变化的差异性。研究表明:爆炸冲击波产生的水压力以炸药为中心向四周传播,对冰面破碎起主要作用,被扰动冰体主要发生振动折裂。炸药周围近区压力初始峰值大体上相同,爆源远区相差较大,冰盖的存在减弱了爆破能量的耗散。对于相同集中药包,入水深度直接影响爆破破冰效果。和常规水下爆炸相比,在冰体覆盖的相对封闭条件下水中峰值压力较小,衰减速度较慢。 相似文献
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A review of imported and Russian bomb calorimeters, certified in Russia, is presented. A comparative analysis of their main
metrological and technical characteristics and also of the methods and modes of measurement employed is carried out. The constructional
features, level of automation of the measurement processes and the processing of the results for different types of calorimeters
are described. State Standard samples, which serve to provide metrological support of bomb calorimetry are proposed. 相似文献
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M. Pepi 《Journal of Failure Analysis and Prevention》2002,2(1):43-49
The U.S. Army Research Laboratory, Weapons and Materials Research Directorate performs numerous failure analysis investigations
on munition-related components. Many of the failures are attributable to defects that can be traced back to the manufacturing
process. Typical manufacturing defects encountered include those associated with the material, forging, casting, welding,
and heat treatment processes. Dimensional anomalies have also been noted. Munition component failures are very costly and
may seriously affect the safety and readiness of the armed forces. Additionally, repeated failure may lead to the grounding
(removal from service) of a system, depending on the severity of the problem. Specific examples of component defects/failures
discussed in this report include bomb fin retaining bands, general purpose bomb suspension lugs, missile launcher attachment
bolts, cluster bomb tailcones, general purpose bomb fins, and Gatling gun breech bolt assemblies. This paper focuses on the
importance of proper manufacturing techniques to the munitions industry and, by inference, to numerous other industries. 相似文献