裂纹深度和韧带尺寸对K_c的影响

根据实际构件的特点，主要研究了两种弹体金属材料的非比例试件面内尺寸（α，Ｗ－α）对Ｋ＿（１ｃ）的影响及有效性评价。通过不同试件形状及尺寸的对比试验，初步认为在满足Ｂ≥２．５（Ｋ＿（１ｃ）／σ＿（０．２））￣２的条件下，裂纹深度、韧带尺寸的最低要求是：５８ＳｉＭｎ钢α≥１．７（Ｋ＿（ＩＣ）／σ＿（０．２））￣２、（Ｗ－α）≥２．０（Ｋ＿（１ｃ）／σ＿（０．２））￣２５０ＳｉＭｎＶＢ钢α≥１．６（文中讨论了材料强度级别（σ＿Ｓ／Ｅ）对试件几何尺寸限制要求的影响。     

GAP／AN推进剂的燃速特性

为降低固体火箭推进剂燃烧生成物中氯化氢（ＮＣＩ）的含量，推进以硝酸铵（ＡＮ）作氧化剂，以缩水甘油叠氮聚醚（ＧＡＰ）作粘合剂的推进剂早日达到实用水平，进行了改进燃达特性的研究。证明添加少量高氯酸铵（ＡＰ）可以增加燃速。ＡＰ与ＡＮ的质量比为ＡＰ／ＡＮ＝１．０时，在４ＭＰａ以上压力下，ＡＰ的扩散火焰决定燃４，压力指数在０．３７以下。在ＧＡＰ／ＡＮ／ＡＰ推进剂中添加氧化铁时，燃速及５ＭＰａ以下的压力指数增大．在高压方面压力指数下降。证明氧化铁有促进ＡＰ热分解的作用。     

评价估值精度的新方法—BayesA—值方法

本文提出了一种评价线性回归模型 △Ｗ＝ＳＣ＋ζ，ζ～Ｎ（０，σ＾２Ｉｍ） 参数Ｃ的估值精度的新方法－Ｂａｙｅｓ Ａ－值方法。在回归系数Ｃ＝（ｃ１，ｃ２，…，ｃｎ）具有先验分布Ｎ（０，σ＾２Σ０）时，得出了 Ａ＾２ｉ＝Ｅｃ｜△Ｗ（ｃ＾２ｉ）／Ｅｃ｜△Ｗ｛Ｅ（Ｃｉ－Ｃｉ）＾２｝，ｉ＝１，２     

GAP／AN／AP系低公害推进剂的低压点火特性

利用二氧化碳（ＣＯ２）激光器研究了含高氯酸铵（ＡＰ）２０％～３０％的ＧＡＰ／ＡＮ／ＡＰ系低公害推进剂在低压时的点火特性。推进剂ＡＮ－４０及含马格纳利厄姆镁铝合金的Ｍｇ·Ａｌ－５在３９．９～５３．２ＫＰａ以上的低压空气中可以自动点火，而在惰性保护气体中不能自动点火。证明自动点火与保护气体中的氧气有关。进一步降低保护气体压力时，两种推进剂都出现了不稳定的振动现象。Ｍｇ·Ａｌ－５推进剂比ＡＮ－４０更易产生振动现象。在低热流方面，加入镁铝合金的推进剂点火时的表面温度比ＡＮ－４０推进剂的约低２０℃，因而点火滞后时间长，吸收能量多，表面附近固相内热层增厚，比ＡＮ－４０推进剂有更好的自动点火性能。用差热分析研究热分解证明，推进剂组份中相对ＡＮ添加镁铝合金０．１具有与相对ＡＮ增加ＡＰ０．２５同样的热分解效果。这可能是因为在高热流方面ＡＮ－４０与Ｍｇ·Ａｌ－５推进剂的点火特性大体相同     

超燃冲压发动机喷管性能的研究

使用Ｍａ＝２．５的高温气流测量了超燃冲压发动机喷管的推力，高达３１００Ｋ的总温通过燃烧一甲基肼（ＭＭＨ）和四氧化二氮（ＮＴＯ）获得。监测喷管壁压，以估算出喷管的压力，使用相同的喷管进行一组低温氮（Ｎ２）流实验。一种非粘性二维码可模拟低温氮流时的喷管性能。化学动力学计算还预测出了误差在３．６％以内的ＭＭＨ／ＮＴＯ实验结果。对超燃冲压发动机喷管内的动力损失、二维损失和摩擦损失进行了鉴定，还讨论了Ｈ２燃料发动机喷管性能的尺度效应。     

BAMO 共聚物的热分解

研究了ＢＡＭＯ与惰性组分ＴＨＦ、含能组分ＡＭＭＯ、硝酸酯ＮＭＭＯ等共聚后对它们的热分解的影响。Ｂ／Ｎ（７／３）分解时ＢＡＭＯ与ＮＭＭＯ各自独立地进行分解，由ＮＭＭＯ单元分解产生的热加速了ＢＡＭＯ单元的分解。在Ｂ／Ｔ（７／３）和Ｂ／Ａ（７／３）中ＴＨＦ和ＡＭＭＯ对ＢＡＭＯ的分解没有影响。在ＤＳＣ图中除了Ｂ／Ｎ（７／３）有两个放热峰外，Ｂ／Ａ（７／３）和Ｂ／Ｔ（７／３）只有一个放热峰，两个峰中的低温峰是ＮＭＭＯ单元分解产生的，另一个峰是由ＢＡＭＯ分解产生的。Ｂ／Ａ（７／３）的分解速度与ＢＡＭＯ的分解速度相同，这表明ＡＭＭＯ的活性与ＢＡＭＯ的活性相同。含７５％ＨＭＸ和２５％共聚粘合剂的推进剂中，Ｂ／Ａ（７／３）／ＨＭＸ的燃速比Ｂ／Ｎ（７／３）／ＨＭＸ的快，这是因为虽然在ＤＳＣ中Ｂ／Ａ（７／３）的分解热比Ｂ／Ｎ（７／３）的小，但Ｂ／Ａ（７／３）／ＨＭＸ的分解热却比Ｂ／Ｎ（７／３）／ＨＭＸ的大。由于分解反应主要发生在推进剂的凝聚相，因此凝聚相在推进剂的燃烧过程中起主导作用。     

两种中碳铬镍钼钢高温回火态的延性断裂韧度

通过对阻力曲线（Ｊ＿Ｒ－△ａ）的剖析，结合ＴＥＭ组织和ＳＥＭ断口分析，研究了两种中碳铬镍钼钢高温回火态的延性断裂韧度。结果表明：在５００～５９０℃回火时条件断裂韧度Ｊ＿（０．２）随回火温度升高而增大，而启裂断裂韧度Ｊ＿ｉ随回火温度变化的规律较为复杂。这是因为决定材料抵抗裂纹启裂能力大小的主要因素是Ｊ＿ｃ（弹性分量），而ｄＪ＿ｐ／ｄａ则能明显影响裂纹稳定扩展能力的大小。     

利用实时X射线照相系统对高燃速推进剂燃烧特性的研究

实时Ｘ时线照相系统用于确定含有氢化硼添加剂系列为高燃速推进剂的燃烧特性，在１４．０ＭＰａ的压力下。观察表明，当线性燃速升至７０ｃｍ／ｓ时，无迹象显示“不正常”燃烧现象，即没有容积燃烧和药柱破碎现象，将氢化硼的浓度由０稍增至２％时，就会发现燃速有显著提高．     

航天飞机先进固体发动机1．2m缩尺模型材料的碳布酚醛烧蚀试验

用ＮＡＳＡ马歇尔航天飞行中心（ＭＳＦＣ）１．２ｍ发动机试车台，对航天飞机先进固体火箭发动机（ＡＳＲＭ）喷管材料进行烧蚀评估。对各种碳布酚醛（ＣＣＰ）材料在相同构形和同一发动机工作条件下进行了试验。讨论了以经验构造材料模型的方法。材料模型的试验通过在不同对流环境下计算烧蚀值，并将测量值与计算值进行比较而完成。１．２ｍ缩尺模型经验数据取自喷管的最小粒子冲击区，目的是减少机械磨蚀对分析模型的影响。     

有机叠氮化物几何构型和生成热的分子轨道研究

用ＡＭ１、ＰＭ３、ＭＮＤ烽ＭＩＮＤＯ／３四种半经验分子轨道（ＭＯ）方法对５５种有机叠氮化合物的分子可构型进行了全优化计算，与已有的气相实验构型进行比较，发现ＡＭ１法偏差较小，ＰＭ３和ＭＮＤＯ次之。ＡＭ１法计算所得生成热与基团加和法求得的结果最接近，ＭＩＮＤＯ／３计算结果偏差最大。     

Nitrosation and Nitration of Tetraacetyldibenzylhexaazaisowurtzitane

Tetraacetyldibenzylhitane (TADBIW) was subjected to debenzylation by nitrosating with inorganic materials available commercially to synthesize tetraacetyldinitrosohexaazaisowurtzitane (TADNSIW). TADNSIW was purified, and its structure was determined by FTIR, 1H NMR, MS and element analysis. The debenzylation reaction of TADBIW gave quantitative benzaldehyde as a by-product. This indicates that the reaction produces an imine cation as an intermediate. Hexanitrohexaazaisowurtzitane (HNIW) was prepared from unpurified TADNSIW with the yield over 96.0 % and the purity more than 98.0 %. And the mechanism of the reaction from TADNSIW to HNIW is proposed to be oxidation of nitroso and nitration of acetyl on the molecule of TADNSIW, This reaction system involved is simple, and the reaction can complete within a short time and under mild conditions. The product can be easily to separate and the waste disposed readily.     

Method for Measuring Velocity of Warhead Fragments Based on Photoelectric Detection

For measuring velocity and impacting position of single fragment of warhead, a non-contact measuring method is proposed, in which a six-light-screen array, a position indicator, a multi-channel chronograph and a computer are used.The principle of measurement is described. The key device of the system is a light screen array sensor which consists of six light screens allocated with certain geometrical parameters. When the fragment flies through the light screen array, the time of passing through each of the screens is recorded by the multi-channel chronograph. According to the time data and the geometrical parameters of the array, the velocity vector and the location of the fragment can be calculated immediately. The presented method can be used to locate the fragment and to measure the real velocity on its flying direction. It can also be used to measure the velocity of a fragment swarm after the system is engineered further.     

A Robust Algorithm for Watermarking 2D Vector Maps with Low Shape-Distortions

The technique of watermarking has been introduced into 2D vector maps for many potential applications such as protecting the copyright of important GIS （geographical information system） data and tracing the data source of military maps. In most previous works, although the validity of the map data could be preserved during the embedding procedure, the shape-distortions of the map elements are usually neglected which would tend to degrade the invisibility of the watermarking schemes. A shape-preserving algorithm for watermarking 2D vector maps is presented in this paper. A 1D distance sequence extracted from the original map is adopted as the cover data instead of 2D coordinates. A watermark bit is represented by changing the distributions of the cover data. The embedding procedure induces lower shape-distortions than in former works. Experimental results indicate better invisibility of the proposed scheme, as well as its robustness to certain attacks such as map simplification, interpolation, additive noise and most geometric transforms.     

数码电子雷管中影响点火头性能因素分析

阐述了数码电子雷管中,点火药剂细结晶三硝基间苯二酚铅（LTNR）的制备工艺;从点火药剂的种类、加入黏合剂的质量分数、桥丝直径、点火头的电阻值、防潮漆的蘸涂等方面对点火头性能的影响因素进行了探讨;通过震动试验、并联起爆试验、延期精度检测与考核,试验结果表明：一次性合成的细结晶LTNR是制造数码电子雷管点火头较为理想的点火药剂,按技术要求生产的点火头性能指标能够满足行业标准要求。     

Open Rule-setting System Applied to Conceptual Design of Engines

Open rule-setting method advanced in this paper concentrates on providing designers of engines with a convenient way to express their design innovations and develop the expected prototypes in the early CAD stage, and constitute effective models for the following analysis process of CAE and CAPP. The problems arisen in the process of conceptual design with the traditional experience-based development method are analyzed. Based on those analyses, open rule-setting method is presented and some associated technical problems are discussed. The functional framework of open rule-setting system was built as software engineering methods. The speciality of the engine product as a kind of complex product and the requirement of the engine product based on its structural particularity to rule-setting system are considered carefully. A demonstration is supplied to illustrate how the open rule-setting method enhances the efficiency and quality of the engine conceptual design.     

Design and Implementation of One Missile Visual Simulation System Based on OpenGL

The implementation of a missile＇s visual simulation system is explained that is developed with OpenGL（open graphic library） and the flight path and flight carriage in different stages of the missile are displayed. The establishment problems of the 3D scene are circumstantiated including the construction and redeployment of the model, creation of the virtual scene, setting of the multi-viewports and multi-windows etc. The missile＇s data driver, system flow, the modules and their mutual relations of the missile visual simulation system are discussed. The missile flight simulation results and effect of the scenes are given.     

Research on Linux Network Device Driver

By analyzing the working principle of Linux network device driver, discussing the Linux network driver structure and its key technologies, the general network driver structure and its design methodologies in Linux system are summarized. Through modifying the network device driver of Linux device driver 3rd version snull, c and improving the COW technology, the Zero-Copy technology in Linux （kernel version 2.6.11 ） is implemented. In the end, the success test tells us that the thorough analysis of network device driver is the foundation of many applications, and it also provides a certain improvement to a lot of real applications, even to military application development.     

Improvement and Experiment of the Reamer in Vibra Cutter Against Wave Edge of Titanium Sheet Alloy Parts

By analyzing the influencing factors of part quality making of sheet alloy of titanium by vibra cutter, the shape of upper reamer is set as cylinder and wedge-shaped form, and the lower reamer as plain and hemicycle form, and its main structural parameters are defined as well. Then it is validated further that such improved vibra cutter reamer can be used to process curve-edged parts of titanium alloy sheet. The experimental result shows that the titanium alloy sheet parts processed by above equipment have no sharpen angles for convex parts and evident crevasse of concave-edged part. In summary, such improvement can eliminate the free-waved edge and improve the manufacture quality of titanium alloy sheet parts greatly.     

Dynamic Encryption Technology in Ad-hoc Networks

A new dynamic encryption application in ad-hoc networks is proposed. The advantages of this method are its being able to use the previous ciphertext as a seed of a new encryption process, rendering the encryption process effective in all communication process by continuous dynamic key generation together with synchronization, and its capability to cut back on system bandages to a greater extent, which is valuable for the ad-hoc circumstance. In addition, the rationality and effectiveness of this novel encryption method have been verified by the test results.     

Experimental Study on the Small Flyer Initiating Behavior of Fine-grained Explosives

The initiating behavior of fine-grained explosives by small flyer is studied. The diameter of small flyer in this device is 1 ram. The test results indicate that the granularity of explosives has great effect on its flyer initiating sensitivity.The flyer initiating sensitivity of the fine-grained explosives is higher and the critical initiating energy is lower than that of common explosives. For common explosive, the flyer initiating sensitivity increases as the density is reduced. But for the fine-grained explosive, the test results are exactly opposite.