身管内弹道性能改变量的静态标定研究

目前国内外静态标定火炮身管内弹道性能改变量的方法,都存在着原理和精度不高的缺陷。采用多特征截面的标定方法可取得满意的精度,本文论述了其理论基础、精度及应用领域。     

内弹道多通道实验数据处理方法研究

本文对内弹道多通道实验曲线的处理方法进行了较为详细的分析.充分利用多通道实验数据,得出了弹丸运动规律、弹底压力变化规律、平均压力变化规律.为进一步认识膛内现象奠定了一定的基础.     

液压平衡式发射装置自航发射内弹道模型与仿真

基于装备情况,探讨了潜艇液压平衡式发射装置自航发射鱼雷的可行方案,并建立了后端自流补水的自航发射方式的内弹道模型,进行了计算机仿真。通过试验结果描述鱼雷螺旋桨工作特性,分析了自航发射鱼雷出管速度偏低的原因,并提出改进措施。     

某加农炮身管内膛烧蚀磨损对内弹道性能的影响

通过对某加农炮的身管烧蚀磨损特征数据进行分析整理,确定了身管烧蚀磨损特征面,采用了多特征面来表述火炮内弹道性能变化。将该研究方法具体用于某加农炮身管特性的研究,建立了该加农炮的内弹道性能与其身管内膛烧蚀磨损特征量之间的关系模型。     

考虑火药中钝感剂含量分布的内弹道计算

针对某新型弹药弹道性能检测的需要,利用气相色谱法对其发射药中钝感剂含量分布进行了测定,建立了考虑钝感剂含量分布的该新型火炮的内弹道模型。模型中钝感剂对弹道性能的影响是通过对火药燃速和火药力的影响来体现的。应用该模型对2个批次的弹药进行了内弹道计算,并对一定樟脑含量的火药内弹道性能进行了预测。计算结果表明,樟脑含量对最大膛压影响较大,但对初速的影响则不如膛压明显。     

Design optimization for a launching system with novel structure

A launching system with novel structure using optimization method is investigated to improve the muzzle velocity of guns in this article. This system has two tandem chambers of which the front one is ignited first and the other is ignited after a while. The launching process of this novel system is modelled and a series of different schemes are simulated, to discover the interior ballistic performance of this novel launching system. In order to obtain the optimal loading conditions, an optimization model combined with the combustion model is established. The optimal schemes can improve the muzzle velocity by 20.6% without changing the parameters of barrel. It means that this novel launch system could improve the interior ballistics performance significantly and it still has considerable potential to be ameliorated.     

A transformed insurgency: The strategy of the Communist Party of Nepal (Maoist) in the light of communist insurgency theories and a modified Beaufrean exterior/interior framework

This paper examines the insurgency in Nepal (1996–2008) from a military theoretical point of view. It looks at the insurgency from André Beaufre's exterior/interior framework, which is modified to match postmodern conflicts. Simultaneously the importance of the political is underlined. The author critically examines the relevance of the Maoist label the movement and insurgency have received. He claims that the insurgency became a hybrid consisting of Chinese, Latin American, and Leninist thoughts wrapped in pragmatic/revisionists and nationalist ideas. The author also suggests that the ability of insurgents – or counter-insurgents – to combine the effects of the exterior and interior is more likely to constitute the key centre of gravity of a conflict than any single political, economic, or military factor.     

气缸张开式尾翼弹气缸压力数值仿真研究

为研究气缸张开式尾翼工作原理,分析某型滑膛反坦克炮榴弹气缸充放气过程,建立尾翼弹在炮膛内的气缸压力模型,将其与炮弹底部气体压力、密度、温度等参量的变化规律相耦合,并对气缸压力模型进行可解性分析,得到一种求解气缸气体压力、密度等参数随时间变化的数值方法．     

火炮水弹试射内弹道学分析计算

根据水弹试射原理及水弹试射实践经验,应用火炮内弹道学理论,建立火炮水弹试射内弹道学模型,分析水弹试射的影响因素,并以某炮水弹试射为例进行仿真计算和膛压测试,计算结果与试验结果基本相符,为新型火炮水弹试射的参数获取提供理论依据.     

基于改进差分进化算法的内弹道参数优化

火炮内弹道参数直接影响其计算结果,内弹道参数优化设计是内弹道分析计算的重要环节。基于经典内弹道计算模型,以火药内弹道计算中最为敏感的燃速指数及其燃速系数为设计参量,以最大膛压及弹丸初速的计算值与测试值一致性为目标,对差分进化算法群体的初始化、变异因子及变异模式进行了改进,对某型火炮的内弹道参数进行了优化计算。优化设计结果表明改进后的差分进化算法满足内弹道设计工程实践要求,为内弹道参数优化设计提供了一种有效的算法。