首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 62 毫秒
1.
为提高破片模式的毁伤效能,提出了一种将预制破片群与药型罩破片群相结合的复合破片场成型技术,给出了复合破片战斗部的弹体结构,对破片场的成型过程进行了数值仿真,并进行了实验验证。研究结果表明:采用该技术的战斗部,可形成中心区域为药型罩破片群、外环为预制破片群的复合破片场,且形成的破片场密度均匀,径向散布角达22.5°; 该复合破片场成型技术可应用于巡飞弹战斗部。  相似文献   

2.
龙源  刘健峰  纪冲  钟明寿  刘影  周辉 《兵工学报》2016,37(12):2226-2234
起爆方式对双层药型罩爆炸成型弹丸(EFP)成型特征参数及终点毁伤效应具有重要影响。基于双层药型罩EFP战斗部静爆试验结果,利用ANSYS/LS-DYNA非线性有限元动力学软件研究了起爆点数目对双层药型罩EFP战斗部成型及侵彻特性的影响规律。研究结果表明:当起爆点数目在4~8时,双层药型罩EFP战斗部可起爆成型具有良好空气动力学特性及优良终点毁伤效应的带尾翼大长径比聚能侵彻体;当起爆点数目为6时,双层药型罩EFP战斗部成型侵彻体终点毁伤效应的最大侵彻深度达到1.07倍的装药口径,较端面单点中心起爆方式获得侵彻体侵彻钢靶的最大深度提高了32%.  相似文献   

3.
杨丽  陈闯  张健  相升海 《兵工学报》2016,37(4):621-626
带隔板偏心的亚半球罩装药可形成杆式射流,为研究其成型及侵彻特性,以等质量原则设计了3种偏心的亚半球药型罩,开展杆式射流成型的X光试验及静破甲试验,对比不同变壁厚方式偏心亚半球罩杆式射流的成型形态及侵彻能力,找出了形成最佳杆式射流的药型罩变壁厚。研究结果表明,罩顶和罩口厚、中间薄形状形成杆式射流的杵体小,成型效果最佳,侵彻能力强,孔径均匀。通过理论研究杆式射流的成型参数,获得了杆式射流的速度和质量分布,罩顶和罩口部厚、中间薄形状药型罩形成杆式射流的质量较传统单锥罩提高22%,头部速度提高10%.  相似文献   

4.
高鹏  王芳  汪聪  牛文煜 《兵工学报》2024,(3):720-730
为改进整体式多爆炸成型弹丸(Multiple Explosively Formed Projectile, MEFP)战斗部中位于边缘位置处的药型罩口部闭合较差的问题,设计一种沿周向壁厚不同的偏心药型罩。将该药型罩应用于D型装药结构战斗部中,通过理论分析以及数值仿真方法,针对药型罩较厚一侧朝向和偏心距大小对药型罩成型的影响规律进行研究,开展爆炸成型弹丸(Explosively Formed Projectile, EFP)软回收试验。研究结果表明:偏心药型罩较厚侧朝向及偏心距大小对EFP各方向速度基本无影响,对EFP成型效果影响较大;药型罩较厚侧朝向战斗部中心时成型效果最佳;偏心距的大小能够调整药型罩周围微元向中心压合的速度差,改善药型罩口部包合情况;试验中回收到的EFP成型结果与仿真结果吻合度较高;偏心药型罩通过调整药型罩壁厚与爆轰波强度的匹配关系能够改善非对称爆轰下EFP的成型,有效解决D型装药结构MEFP战斗部位于边缘位置处药型罩成型较差的问题,为整体式MEFP战斗部边缘位置处药型罩结构设计提供参考。  相似文献   

5.
为了讨论不同材料对截顶辅助药型罩装药结构形成的影响情况,采用非线性动力学软件AUTODYN-2D对其进行数值仿真,分析了对铜、铝、钛3种材料作为主药型罩和钨、钽、铁3种材料作为辅助药型罩时形成的射流形态的情形,并选出最优材料,然后在选出的材料结构下讨论了辅助药型罩位置的变化对射流成型的影响;研究表明:对于截顶辅助药型罩装药结构来说,选取钛和钽的材料组合优于其他材料组合;辅助药型罩位置的变化对射流的成型影响并不大;研究结果可为聚能射流研究提供参考。  相似文献   

6.
为进一步提高侵彻威力,设计了一种杆式周向多爆炸成型弹丸战斗部方案.利用数值模拟方法,对外衬结构参数不同的战斗部进行模拟仿真,分析外衬对药型罩初速分布及弹丸成型的影响.模拟结果表明,优化外衬的结构参数,可以控制药型罩速度梯度,进而控制弹丸成型形状,最终所设计战斗部可成型长径比为4:1的密实杆式弹丸,弹丸可穿透30 mm厚45钢.研究结果表明,在线形药型罩外侧布置贴片,可以控制弹丸成型后的形状.  相似文献   

7.
锥角和壁厚对多爆炸成型弹丸成型影响的数值模拟   总被引:1,自引:0,他引:1  
为研究药型罩锥角和壁厚对多爆炸成型弹丸成型的影响,利用ANSYS/LS-DYNA软件对多爆炸成型弹丸的成型过程进行数值模拟。研究结果表明:多爆炸成型弹丸中心处药型罩锥角采用130°~140°、边缘处药型罩锥角采用145°~155°、药型罩壁厚采用2.5~3.5mm时,其侵彻性能较好。研究结果可为多爆炸成型弹丸的设计提供参考。  相似文献   

8.
通过数值模拟研究了药型罩及装药参数对聚能射流成型性能的影响,在此基础上,运用灰关联理论对影响侵彻体性能的各个参数的灰关联度进行了分析。结果表明,药型罩高度、壁厚、锥角、装药高度是影响侵彻体成型性能的主要因素,改变药型罩高度可以实现对侵彻体成型性的控制,药型罩壁厚对侵彻体最后成型产生较大影响,药型罩锥角可以有效控制侵彻体头部和尾部速度差,灰关联分析结果可以作为药型罩设计中优先考虑的重要参数。  相似文献   

9.
爆炸成型弹丸性能参数灰关联分析   总被引:3,自引:0,他引:3  
为了分析药型罩和装药参数对爆炸成型弹丸成型的影响,采用数值模拟方法计算出18种不同方案下EFP成型后的性能参数,基于灰理论对影响EFP成型性能的参数进行了灰关联分析.结果表明:影响EFP速度的主要因素依次为装药爆速、装药密度、药型罩锥角、装药高度、药型罩材料密度、药型罩壁厚;影响EFP长径比的主要因素依次为装药爆速、装药密度、药型罩材料密度、装药高度、药型罩锥角、药型罩壁厚;研究结果可为EFP战斗部优化设计和毁伤性能的提高提供参考.  相似文献   

10.
为研究紧凑型聚能装药结构对侵彻体成型的影响,运用ANSYS/LS-DYNA有限元软件,对不同结构参数药型罩的射流成型进行数值分析。结果表明:当药型罩高小于30 mm,不同装药结构均形成具有一定速度梯度的聚能侵彻体,球缺型罩装药形成的侵彻体尾部杵体小、质量分布均匀、能量利用率高,性能更好;当罩高大于40 mm,不同药型罩装药形成长径比较大的射流,锥形罩形成的射流杵体小、连续性好、能量利用率高,性能更好。  相似文献   

11.
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.  相似文献   

12.
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.  相似文献   

13.
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.  相似文献   

14.
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.  相似文献   

15.
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.  相似文献   

16.
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。  相似文献   

17.
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.  相似文献   

18.
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.  相似文献   

19.
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.  相似文献   

20.
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.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号