Effect of metal powders on explosion of fuel-air explosives with delayed secondary igniters

In order to improve the energy level of fuel air explosive(FAE) with delayed secondary igniters, high energetic metal powders were added to liquid fuels mainly composed of ether and isopropyl nitrate. Metal powders' explosive properties and reaction mechanisms in FAE were studied by high-speed video, pressure test system, and infrared thermal imager. The results show that compared with pure liquid fuels, the shock wave overpressure, maximum surface fireball temperature and high temperature duration of the mixture were significantly increased after adding high energetic metal powder. The overpressure values of the liquid-solid mixture at all measuring points were higher than that of the pure liquid fuels. And the maximum temperature of the fireball was up to 1700 ℃, which was higher than that of the pure liquid fuels. After replacing 30％of aluminum powder with boron or magnesium hydride, the shock wave pressure of the mixture was further increased. The high heat of combustion of boron and the hydrogen released by magnesium hydride could effectively increase the blast effect of the mixture. The improvement of the explosion performance of boron was better than magnesium hydride. It shows that adding high energetic metal powder to liquid fuels can effectively improve the explosion performance of FAE.     

A novel method for determination of lethal radius for high-explosive artillery projectiles

A new model has been defined that enables the estimation of the lethal radius (radius of efficiency) of HE (High Explosive) artillery projectiles against human targets. The model is made of several modules: CAD (Computer Aided Design) modeling, fragment mass distribution estimation, fragment initial velocity prediction, fragment trajectory calculation, effective fragment density estimation, and high explosive projectile lethal radius estimation. The results were compared with the experimental results obtained based on tests in the arena used in our country, and the agreement of the results was good. This model can be used in any terminal-ballistics scenario for high explosive projectiles since it is general, para-metric, fast and relatively easy to implement.     

潜艇面临的威胁及潜空导弹

随着网络中心战的发展,潜艇出海作战将面临更大的威胁。着重分析了潜艇的空中威胁,概述了国外装备和正在研制的潜空导弹,并对其进行了分析和比较。     

超声速地空导弹热环境风洞模拟研究

根据国内风洞的情况,比较了超声速地空导弹的飞行条件与风洞模拟能力的差距,分析了热环境风洞实验中应采用的相似准则,以及实验数据的处理方法。     

浅谈舰载燃料空气炸药武器抗击巡航导弹

通过对FAE武器的特种杀伤效果和对巡航导弹相关技战术性能分析,利用FAE武器(云爆弹)的爆轰、冲击波、破片、窒息和电磁电热效应等特种杀伤效果,剧烈改变导弹的工作环境和对巡航导弹的弹体、导引系统、控制系统和发动机等关键部件进行“软”、“硬”破坏,以期达到抗击巡航导弹的目的,同时阐述了装备水面舰艇的可行性。     

空气弹簧强度分析

应用复合材料理论,对空气弹簧的单层帘线橡胶的应力-应变关系及力学参数进行了计算.运用有限元方法对空气弹簧进行了应变分析,用所得到的数值结果,结合多层帘线橡胶的力学特性以及单层帘线橡胶的强度理论,对空气弹簧进行强度分析.计算结果表明,囊体的载荷主要由帘线承受.     

弹道冲击下层合板破坏模式及抗弹性能实验研究

以舰用轻型复合装甲研究为背景,针对不同纤维增强种类(包括玻纤织物 C400、C200、SW220 和芳纶纤维织物T750)以及不同面密度层合板结构,在6.2 g刚性微曲面柱形弹弹道冲击下的防护能力展开实验研究,着重讨论了层合板结构弹道冲击下破坏模式、弹体初始侵彻速度及面密度与抗弹能力和抗弹效率之间的关系,认为不同的破坏模式体现了不同的吸能特性和纤维失效机理.     

基于满意决策的多UAV协同目标分配方法

目标分配是UAV自主控制的重要问题。提出了基于满意决策的多UAV协同的目标分配技术,为解决多UAV协同的目标分配问题和多机场起飞的UAV编队配置问题提供了一种新颖而有效的方法。重点对其中的满意集计算、联合满意度、拒绝度和选择度的建立和计算等关键问题进行了讨论。以压制敌防空火力任务为背景对该方法进行了仿真,并将本文提出的方法和其他方法做了比较,仿真结果表明基于满意决策的多UAV协同的目标分配方法在效率上有明显优势。     

空气弹簧隔振平台姿态模糊控制研究

空气弹簧隔振器在舰船上已经被广泛使用,但是空气弹簧漏气往往造成隔振平台姿态倾斜或者高度下降,严重影响设备的正常工作以及隔振性能.因此,检测漏气情况以及保持平台姿态平稳是空气弹簧隔振系统需要解决的关键技术问题.由于大型设备的空气弹簧隔振平台结构往往非常复杂,很难建立其精确的数学模型,常规的依靠精确模型的控制策略在这里无法奏效.文中分析了空气弹簧漏气对隔振平台姿态的影响,提出了一种漏气快速检测方法,利用模糊控制理论对空气弹簧隔振平台的姿态控制进行了研究和试验.试验结果表明,空气弹簧隔振系统姿态模糊控制技术是完全可行的,效果良好.     

高超声速巡航飞行器中制导研究

通过分析目前应用较为普遍的几种组合导航方式,针对高超声速巡航飞行器,提出了采用捷联惯性导航系统(SINS)/GPS/天文导航系统(CNS)组合导航作为其中段制导方案,并利用四元数法进行捷联惯性导航计算,运用联邦滤波方法对组合导航进行了仿真,仿真结果表明该方案行之有效。