天幕靶灵敏度标定方法研究

天幕靶探测灵敏度是天幕靶重要的性能指标,目前使用的天幕靶灵敏度标定方法和表征参数不能准确的表征天幕靶的灵敏度.分析了天幕靶的工作原理和灵敏度机理,给出了光学镜头参数、被测弹丸长度与灵敏度之间的关系公式,提出了一种用小口径弹丸标定灵敏度的方法,推导了倍弹径数标定修正公式.通过气枪弹试验验证,研究的标定方法可行,给出的倍弹径数对实际使用具有明确的指导意义.     

Penetration of a glass-faced transparent elastomeric resin by a lead–antimony-cored bullet

The penetration of the lead antimony-cored 7.62 mm × 51 mm bullet into a glass-faced polyurethane elastomeric polymer resin has been studied. The resulting craters in the resin contained elongated bullet core material that had a significant amount of porosity. A simple linear viscoelastic model was applied to AUTODYN-2D to describe the behaviour of the resin and numerical results of the penetration mechanism and depth-of-penetration appeared to match experimental observations well. Analysis of the high speed photography and a numerical model of this bullet penetrating a viscoelastic polymer showed that during the initial stages of penetration, the projectile is essentially turned inside out. Furthermore, the shape of the cavity was defined by the elastic relaxation of the polymer that led to compression of the core material. A weight analysis of the penetrated materials showed that using a thicker tile of glass resulted in better ballistic performance.     

某型枪弹弹头飞行稳定度改善方法

通过对某型枪弹外弹道飞行稳定度和其对外弹道精度的影响分析,得出了该弹在设计中影响其散布密集度的主要因素,对改善该弹的散布密集度的适应性提出了改进方向。     

弹着点散布因素与密集度试验问题分析

针对目前密集度试验无法区分火炮、弹丸、装药等各分系统对密集度综合值的影响问题进行了分析研究；通过对影响弹着点散布因素的系统分析，归纳了火炮、弹丸、装药各分系统对密集度影响的主要因素，指出了密集度试验时应测试的参数和注意的问题，并在此基础上提出了有关建议。     

相关分析技术在光幕靶速度测量中的应用

论述了利用相关信号处理技术测量弹丸速度的原理，分析了数字采样的周期对测量误差的影响。为了用较低的采样频率获得同样的测量精度，对计算得到的互相关函数进行多项式拟合。通过计算机仿真和实弹实验对所提方法进行验证，结果表明，该方法的测量精度与基于测时仪构成的测速系统相同。     

Traceability for ballistics signature measurements in forensic science

The National Institute of Standards and Technology (NIST) in collaboration with the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) has developed the Standard Reference Material (SRM) 2460 Bullets and 2461 Casings. NIST has also developed a 2D and 3D Topography Measurement and Correlation System for ballistics signature measurements. This system includes stylus instruments and a confocal microscope for 2D and 3D topography measurements, and a 2D and 3D topography correlation program developed by NIST. NIST and ATF are proposing to establish a National Ballistics Measurement Traceability and Quality System using these materials. In this paper, basic concepts and specific requirements for establishing ballistics measurement traceability are introduced; three key issues are discussed that include: (1) establishing a reference standard; (2) establishing an unbroken chain of calibrations; and (3) evaluating measurement uncertainty for both the geometrical topography measurements and the optical image correlations of the ballistics signatures.     

一种新型触针式三维弹头痕迹检测系统

介绍了一种新研制的触针式三维弹头痕迹检测系统的原理、结构、控制以及实验结果。该垂直分辨率为０．００５μｍ，测量范围６ｍｍ，圆分辨率５０＂，轴向分辨率为１．２５μｍ，可以完整地获取弹头发射痕迹的直实形状。     

Optoelectronic methods and devices for measuring bullet velocity

Optoelectronic methods and devices are considered for measuring bullet velocity. The main sources of errors are analyzed. A model is developed for forming the photoelectric signal by which measurement error is determined. Curves are provided for the dependence of measurement error on structural parameters. __________ Translated from Izmeritel’naya Tekhnika, No. 3, pp. 45–48, March, 2006.     

复合射孔新技

射孔技术是石油天然气系统开发工程中的关键技术之一。复合射孔技术采用二次起爆、二次射流连续接力复合射孔新原理 ,能大幅度提高射孔深度和孔径 ,增大渗透面积 ,理想地沟通油气层段的储油渠道 ,达到油气田高产稳产的目的。文章详细介绍了复合射孔原理及复合射孔弹研制中的关键技术 ,并对试验结果进行了简要的分析     

旋转弹头水平入水空泡及弹道的实验研究

利用数字式高速录像机实验研究了头部为半球形的弹头与手枪普通制式弹头在两个水深、6种速度下水平入水时的空泡及弹道特征。实验结果表明,弹头形状对弹头空泡与入水弹道的稳定性有着重要影响。半球形弹头表现出较好的弹道稳定性,而普通制式弹头的弹道不稳定,呈现出特有的藕节形空泡。在一定的速度范围内,弹头入水的速度衰减规律具有一定的相似性,表现出极强的速度衰减特性。建立了弹头水中速度衰减规律的数学预报模型,并与实验结果进行了比较,理论与实验结果符合得较好。