Experimental and numerical study on the influence of shaped charge liner cavity filing on jet penetration characteristics in steel targets

Penetration characteristic(size and shape of penetration craters made in high hardness ARMSTAL 30PM steel) of shaped charge jets formed after detonations of modified PG-7VM warheads was analyzed in the article. Modifications consisted in removing the frontal part of the grenade(fuse, ballistic cap and conductive cone) and introducing of the liner cavity filling made of polyacetal copolymer POM-C. The filings in the form of solid cones with three different heights(33%, 66% and 100% of H-the heigh...     

高增益微带天线的设计

为了提高天线增益并实现波速赋形,故在后腔贴片天线上采用覆盖层加载技术。本文采用介质和磁特性“谐振增益”技术,讨论了材料的横向尺寸上的切断效应。该研究导致广泛有效使用的软件包,它是建立在瞬时逼近的“谱域法”基础之上的。     

新的陆军干扰机进行试验

试验结果表明，不同耕法对土壤含水率的影响主要在表土层（０－１０ｃｍ），对１０ｃｍ以下层次影响不明显。免耕区土壤对降雨的接纳能力和蓄水保水能力不及翻耕区和少耕区，尤其是在连续干旱的情况下。