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为适应军事技术向信息化、智能化方向发展的趋势,研究设计了一种多路遥控起爆器。该系统主要由发射机单元、接收机单元和雷管组成。本文论述了系统设计的总体方案,发射端、接收端和单路起爆电路的设计,以及系统实现的方法和原理。该多路遥控起爆系统实验结果表明,遥控距离最远达5000m,发射控制成功率98%,工作适应温度-20~+40℃,具有较强的抗振动、抗冲击、抗电磁干扰、抗雷击能力,并具有良好的密封防潮性能。该系统还可作为矿山和工程爆破的一种爆破器材。 相似文献
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文章综合介绍了水下爆破采用的几种先进的起爆技术,着重阐述电磁感应遥控起爆、超声波遥控起爆、导爆索起爆技术和控制震动技术的基本原理、装置和结构等. 相似文献
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文章结合工程爆破技术的特点,首先对激光起爆系统进行了重新划分,然后着重讨论了激光雷管结构设计制造、药剂选择及制造工艺、激光器、光能传输网络及系统连接与检测方式等关键技术。在当前的激光起爆技术水平下结合我国民用工程爆破特点,激光起爆技术运用在工程爆破领域,从技术和成本方面均具有实用性和可行性,并值得在未来的工程爆破中提升整个爆破技术的安全技术水平。 相似文献
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在爆破工程中,任何装药都必须采用一定的起爆器材和相应的起爆方法,使装药安全、准确而可靠地爆炸,以达到爆破的目的。本文就在工程实际中如何合理地选用不同类型的起爆器材问题,通过笔者所参与、设计的三个不同类型的爆破作业实例,进行了典型的分析和总结。 相似文献
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介绍激光起爆系统的主要构成及研究进展,针对激光起爆系统检测的难点,提出了一种简单、可行的检测方法。该文重点进行了激光起爆系统的外置式检测技术研究,包括激光起爆器的光路设计、检测光纤设计和耦合结构设计,并通过试验验证,解决了激光起爆器光路定量反射的问题,可为武器、航空航天等高可靠系统提供一定借鉴。 相似文献
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针对EFP战斗部多点同步起爆系统所使用的常规电雷管安全性低和爆炸网络同步性差的问题,基于爆炸箔起爆技术固有的高安全特性,以2发或3发冲击片雷管串联为多点起爆系统的基本单元,设计了3点、4点、6点和9点同步起爆系统,并进行了多点起爆同步性测试。试验结果表明:3点、4点同步起爆同步性时间均小于100 ns,最大同步性时间散布较小,满足设计要求;6点和9点同步起爆同步性时间都超过了100 ns,并且最大同步性时间散布较大。经分析,每组雷管之间等效电阻和等效电感等参数具有差异,造成不同组别的雷管发火回路性能有差别,故引起各起爆支路的电流不一致,导致桥箔的爆发电流和爆发电流密度的差异,从而影响起爆的同步性。 相似文献
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利用γ-氨丙基三乙氧基硅烷(APTES)修饰凹凸棒土(ATP),然后分别与硝酸铈铵(CAN)和过硫酸铵(APS)构建单活性和双活性中心氧化还原引发体系,引发N-异丙基丙烯酰胺(NIPAM)接枝聚合制备杂化粒子。通过红外光谱、X射线光电子能谱、热失重分析和透射电镜等方法对杂化粒子进行了表征,比较了2种引发体系下的接枝效率,并详细研究了单活性中心引发体系下氧化剂和氢离子浓度及聚合温度对接枝率的影响。结果表明,单活性中心引发体系较适宜的聚合温度为30℃,氧化剂浓度为4 mmol/L,氢离子浓度为1.5 mol/L,聚合过程中的接枝效率远高于双活性中心引发体系,此条件下制得的杂化粒子的接枝率为33.3%,且具有明显的温度响应性。 相似文献
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Addis Kidane 《Engineering Fracture Mechanics》2010,77(3):479-491
Quasi-static and dynamic fracture initiation toughness of Ti/TiB layered functionally graded material (FGM) is investigated using a three point bend specimen. The modified split Hopkinson pressure bar (SHPB) apparatus in conjunction with induction coil heating system is used during elevated temperature dynamic loading experiments. A simple and accurate technique has been developed to identify the time corresponding to the load at which the fracture initiates. A series of experiments are conducted at different temperatures ranging from room temperature to 800 °C, and the effect of temperature and loading rate on the fracture initiation toughness is investigated. The material fracture toughness is found to be sensitive to temperature and the fracture initiation toughness increases as the temperature increases. Furthermore, the fracture initiation toughness is strain rate sensitive and is higher for dynamic loading as compared to quasi-static loading. 相似文献
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以可靠性理论为基础,从理论上分析了塑料导爆管起爆系统的可靠性、系统地阐述了导爆索—导爆管雷管起爆系统的设计和施工方法,并介绍了该起爆系统在冷却塔爆破时的实际应用情况. 相似文献
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提高非电起爆网路设计可靠性的途径 总被引:1,自引:0,他引:1
该文提出在非电网路设计中采取增设交叉线路,网路闭合,多点激发,激发点捆联2至3发激发雷管及延时网路避免爆破飞石击砸网路等措施,可使非电网路设计可靠性得到提高。 相似文献
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G.N. Haidemenopoulos P. I. Sarafoglou P. Christopoulos A.D. Zervaki 《Fatigue & Fracture of Engineering Materials & Structures》2016,39(9):1161-1172
Rolling contact fatigue (RCF) is one of the most important failure mechanisms in rails with significant cost‐ and safety‐related implications on the operation of railway systems. In this work, a metallurgical analysis of RCF crack initiation and propagation, including geometrical characteristics of RCF cracks – length, depth from surface, angle of propagation and spacing between cracks, is presented. The role of proeutectoid ferrite in crack initiation has been studied. Analysis of the fracture surface of an RCF crack revealed a ductile initiation zone followed by a quasi‐cleavage crack propagation. Iron oxide formed in the interior of all cracks in rails exposed to stagnant water with implications to crack propagation rate because of crack closure effects. Sequential sectioning parallel to the rolling surface revealed that RCF cracks possess convoluted surfaces. The crack trace expands with depth from the rolling surface. Subsurface crack initiation has also been documented. 相似文献
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CRACK INITIATION MECHANISMS IN TORSIONAL FATIGUE 总被引:1,自引:1,他引:0
V. Doquet 《Fatigue & Fracture of Engineering Materials & Structures》1997,20(2):227-235
Abstract— The development of fatigue damage in Co45Ni specimens during push—pull and reversed torsion tests, performed inside a scanning electron microscope, was observed and the different stress states compared. It appeared that transgranular crack initiation and development is delayed and intergranular crack initiation promoted under torsional loading. This was explained in terms of reduced surface distortion at the emergence of persistent slip bands (PSBs) and smaller compatibility stresses at the PSB-matrix interfaces. The influence of the mechanical strength of grain boundaries on the difference between tensile and torsional fatigue lives is discussed. 相似文献