聚能装药金属射流在天线中的应用研究  

Research on the Application of Shaped Charge Metal Jet in Antenna

作　　者：潘绪超[1] 孙梦潇 何勇[1] 沈杰[1] 陈鸿 张江南 PAN Xu-chao;SUN Meng-xiao;HE Yong;SHEN Jie;CHEN Hong;ZHANG Jiang-nan(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《兵工学报》2018年第8期1457-1465,共9页Acta Armamentarii

基　　金：国家自然科学基金项目(11502118)

摘　　要：瞬态小型化天线是天线技术研究的热点。针对聚能金属射流在小型化天线上的应用问题,采用理论分析和数值模拟相结合的研究方法,以装药直径为50 mm锥形聚能装药为研究对象,进行了聚能金属射流天线形成偶极子天线理论分析。利用有限元软件LS-DYNA,对装药结构、炸药材质形成的聚能金属射流天线适用性开展数值仿真研究。研究结果表明:聚能装药形成的金属射流天线满足瞬态小型化特点,具有与波长匹配的长度、连续性和良好接口;聚能金属射流作为电磁脉冲辐射天线使用时需要具有一定长度和杵体,射流直径和杵体直径有过渡且杵体变化较小,可获得较大增益,金属射流在未完全成型时输入阻抗最小;小锥角罩形成的金属射流更能满足天线要求;药型罩厚度为2.1~2.3 mm时,形成的金属射流天线长度最大,存在一个辐射频率极值;B炸药装药形成射流天线的速度大于JH-2炸药和梯恩梯炸药,且B炸药装药爆炸产生金属射流的断裂时间最佳,最大杵体半径适中,断裂时可用天线长度最长,作为天线应用时可辐射的频率范围最大,更适合作为聚能金属射流天线使用。Transient miniaturized antenna is a hot topic in antenna technology research. For the application of shaped metal jets in miniaturized antennas,a research method combining theoretical analysis and numerical simulation is used. 50 mm conical shaped charge is taken as research object,a dipole antenna formed by a shaped metal jet antenna is theoretically analyzed,and the applicability of the shaped metal jet antenna to the charge structure and explosive material is numerically studied using finite element software LS-DYNA. The results show that the metal jet antenna formed by shaped charge meets the characteristics of transient miniaturization and has the length,continuity and good interface matching with the wavelength. The shaped metal jet needs to have a certain length and body when it is used as an electromagnetic pulse radiating antenna,larger gain can be obtained with a transition between the jet diameterand the slug diameter and the small change in the slug. The input impedance is minimized when the metal jet is not fully formed. The metal jet formed by the small cone angle cover better meets the antenna requirements. When the thickness of liner is 2. 1-2. 3 mm,the length of the formed metal jet antenna is the largest,and there exists an extreme value of radiation frequency. The forming velocity of jet antenna due to B-explosive charge exploding is greater than that of the JH-2 and TNT,and the B-explosive charge explodes to produce a metal jet with the best fracture time,the largest slug radius is moderate,and the longest antenna length is available at the time of fracture. When used as an antenna,the radiated frequency range is the largest and is more suitable for use as a shaped metal jet antenna.

关 键 词：聚能装药 电磁脉冲 辐射天线 小型化 

分 类 号：TJ410.333[兵器科学与技术—火炮、自动武器与弹药工程]