造型粉流动性能对分步压装工艺的影响

为研究造型流动性对分步压装工艺适应性及其装药安全性的影响,测量了不同配方造型粉的流散性和堆积密度,通过分步压装工艺试验,研究炸药的流动性对分步压装工艺及其安全性的影响。结果显示,炸药的流散性在一定范围内才能适合分步压装工艺,降低炸药的流散性,可提高局部装药密度,但增加了径向密度差,降低了装药过程的安全性。在流散性适宜的条件下,分步压装装药密度随堆积密度的增加而增加。     

分步压装含铝炸药的成型性研究

为了提高分步压装装药质量和装药密度,保证装药工艺及使用过程的安全性,设计了3种不同粘结剂配比的含铝炸药,通过50℃、20℃、-40℃及温度冲击条件下药柱的抗压强度测试,研究不同配方药柱的力学性能和环境适应性;采用分步压装工艺进行装药试验,通过装药密度对比分析,研究粘结剂配比对分步压装工艺成型性的影响。结果表明:复合粘结剂配比对炸药可压性有一定影响,含少量增塑剂的炸药配方具有低比压成型特征,有利于提高分步压装装药密度和工艺安全性,并且装药具有良好的环境适应性。     

国外炮弹用炸药研究进展

分析了炮弹用炸药的特点,根据装药工艺不同,分别介绍了国外熔铸型、浇注型、压装型炮弹用炸药的发展概况,并对今后发展方向进行了分析。     

一种大口径战斗部分步压装药有限元模拟与实验

为提高大口径弹药分步压装药效率,对某大口径战斗部分步压装药进行有限元模拟与实验。根据分步压装特点制定针对某大口径战斗部的分步压装工艺流程,采用ANSYS有限元模拟方法分析装药过程中弹壁与导爆管与变形受力情况,开展工艺试验制定工艺参数,采用相应的工艺参数进行大口径战斗部分步压装高能炸药。结果表明,装填结果完全满足××大口径战斗部的装药质量要求。     

炸药动态流散性自动测试系统的研制

在分析炸药动态流散性技术要求的基础上,针对炸药分步压装工艺过程中动态流散性难以测量的问题,提出了基于三维重构和动态称重技术的自动测试系统的总体设计方案。文中采用了一个炸药分步压装模拟单元,模拟分步压装机的工艺过程,设计了包括动态称重、图像采集与处理和控制在内的测控系统,实现了炸药压装工艺过程中动态流散性的测试。测试结果表明该系统设计合理、性能稳定,可用于粉末状物品的动态流散性研究领域。     

不同粘结剂制备的分步压装用炸药对撞击感度的影响

为研究粘结剂对分步压装装药过程产生热量的影响,设计了以高聚物和石蜡为粘结剂的2种分步压装炸药,分别测试了高聚物和石蜡的粘度,并对这2种炸药造型粉及药柱的撞击感度进行了研究。研究结果表明,采用高聚物做粘结剂制备的分步压装炸药在装药过程中产生的热量明显大于石蜡做粘结剂制备的分步压装炸药,即粘结剂类型对分步压装装药工艺的安全性具有重要影响。     

炸药混合技术的发展和应用

以装药工艺分类,描述了现有压装、熔铸、浇注炸药的制备混合工艺技术。介绍了当前炸药混合的新工艺、新技术,分析了炸药混合工艺的发展趋势。     

高效毁伤注装药工艺技术

为加强我国炮兵弹药的高效毁伤能力,对大口径弹高效毁伤注装药工艺技术进行研究。介绍改性B炸药性能、注装药工艺试验、检验和生产性分析,并经多批生产进行了可行性验证。生产实际证明:我国大口径炮弹注装改性B炸药后,综合威力提高40%以上,具有一定的军事效益。     

HNS 炸药压装工艺安全性分析

为确保新型炸药生产过程的安全性,着重从炸药的基本特性、装药工艺流程及工艺参数、压药模具的设计和使用等方面对压装工艺进行安全分析。结果表明,HNS炸药的压装工艺安全可靠。通过对压药模具的爆炸仿真分析和对安全防护装置的爆炸试验,得出结论：即使发生爆炸,现有工艺亦能有效地保护人员安全。     

自动连续分步压装工艺完善及装备工程化控制系统

此系统主要目的是针对自动连续分步压装机控制系统进行改进及工艺完善和物流传输系统的集中控制。详细论述分步压装机由原气动逻辑控制技术改为先进的PLC控制技术的过程,阐述弹体压装输送机、炸药输送机与其他单机设备的衔接、在线弹体的柔性分配调度和要求等技术的可行性、可靠性和先进性,并进行工艺试验。结果表明：该系统能实现弹料及药料的全自动化输送,装药质量稳定,运行可靠,安全设施有效,符合工艺参数要求。     

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.     

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.     

Algorithm for Multi-laser-target Tracking Based on Clustering Fusion

Multi-laser-target tracking is an important subject in the field of signal processing of laser warners. A clustering method is applied to the measurement of laser warner, and the space-time fusion for measurements in the same cluster is accomplished. Real-time tracking of multi-laser-target and real-time picking of multi-laser-signal are introduced using data fusion of the measurements. A prototype device of the algorithm is built up. The results of experiments show that the algorithm is very effective.     

Influence of Installing Error on the Surface Shape Precision of the Axial Symmetry Aspheric Workpiece in Lapping

A method to calculate the surface shape error, which is caused by the installing error between the workpiece and the lapping tool in the process of form lapping, is proposed. The mathematical model which the installing translation error influences on the workpiece surface shape error is established. The changing rule of the error is simulated through the calculating example of the paraboloid workpiece. The results indicate that the surface shape error of the workpiece is increasing with the increase of the installing translation error, it is also increasing gradually along the center point of the curve surface to the edge, and the influence is severer to the curve surface with great curvature than that of the small curvature when the translation error is the same.     

Experimental Research on Output Performances of Giant Magnetostrictive Actuator

The paper introduces the performances of magnetostrictive actuators and its applications, discusses the design methods for the structure and internal magnetic circuit of a giant magnetostrictive actuator, and makes tests on the output displacement and force characteristics for an actuator using homemade magnetostrictive material. The experimental result shows that the actuator has satisfactory output precisions and ranges in transient and stable states, and can be used in lowfrequency vibration control system of precise equipment.     

Overview of Anti-tank Mines

First the different anti-tank mines laying possibilities are shortly summarized： hand emplaced, with mine layers, ground or helicopter relatively topographical well defined, and with cluster systems of projectiles, rockets and aircraft dispensers. Then examples of the three generations of anti-tank mines are presented：Ⅰ generation： detonating only beneath the track; Ⅱ generation： detonating beneath the track and belly; Ⅲ generation： mines with off-route actions. Weight and cost comparisons are strongly favoring the off-route Ⅲ-generation mines.     

A Finite Element Analysis on Static Strength of a Complex Section

A static finite element analysis （FEA） of an impulsive controller section is presented. The boundary condition and a part of the loads are applied. Considering the grades of the stress around the holes being large, the dense grids are adjusted accordingly. Four cases with different loads are compared, thus the influences of different loads on the section are analyzed. Numerical results show that the maximum stress of the section is lower than the strength limit of the material, and the section will not be broken with the static loads.     

Discussion on Mechanism of Breech-Blow Caused by Propellant Charge

From the view point of launch safety caused by fracture of propellant charge, this paper points out that the safety criterion of pressure wave is inadequate to evaluate the launch safety of propellant charge based on the initial negative differential pressure and sensitivity tests. Generally, the maximum barrel pressure does not depend upon the intensity of pressure wave correspondingly. The pressure wave intensity can not describe the fracture degree of propellant charge in chamber and reflect the mechanical environment of propellant charge fracturing exactly and wholly. The evaluation criterion for launch safety of propellant charge should be built on the basis of depicting the fracture degree of propellant bed.     

Experimental Studies of Toxicity on HNIW and Its Intermediates

The polycyclic nitramine hexanitrohexaazaisowurtane（HNIW） is a compound of high energy density. HNIW can replace 1, 3, 5-trinitro-1, 3, 5-triazacyclohexane（RDX） or HMX, hut its toxicity is unknown. In this paper, HNIW, hexabenzylhexaazaisowurtzitane （HBIW）, tetraacetyldibenzulhexaazaisowurtzitane （TADBIW）, tetraacetyldiformylhexaazaisowurtzitane（TADFIW） and tetraacetylhexaazaisowurtzitane（TAIW）, which are intermediates of the synthesis of the HNIW, were selected as the tested objects in acute toxicity test, acute eye stimulation test and skin irritation test according to the standards of ＂chemical product testing method-401 ： acute oral toxicity test＂, ＂chemical product testing means-405： acute eye irritation/corrosion test＂ and ＂chemical product testing means-404： acute dermal irritation/corrosion test＂ of National Circumstance Protect Bureau. The results show that all of the five objects have no toxicity, no stimulation to eye and skin under the tested conditions.     

Dynamic Simulation for Missile Erection System

In order to study the dynamic characteristics of the missile erection system, it can be considered as a rigid-flexible coupling multi-body system. Firstly, the actual system is abstracted as an equal and simplified one and then the forces applied to it are analyzed. Secondly, the rigid-flexible coupling dynamic simulation for erection system is accomplished by use of the system simulation software, for example Pro/E, ADAMS, ANSYS, MATLAB/Simulink, etc. Finally, having the aid of simulation results, the kinetic and dynamic characteristics of the flexible bodies in erection system are analyzed.The simulation considering the erection system as a rigid-flexible coupling system can provide valuable results to the research of its kinetic, dynamic and vibrational characteristics.