扇形装药结构预制破片飞散控制研究
毕业论文关键词：扇形装药 定向战斗部 起爆方式 夹层装药 破片飞散特性
Title Study of Prefabricated Fragments Scattering Control by Fan Shape Structure
Abstract： Sector charge is one charge structure ， which applied to the Aimed Warhead. Initiation modes and charge structure have important effect to fragments scattering, then bring different damage benefits ， so this paper firstly use formulas and muzzle velocity and angle of fragments scattering which was defined, theoretical analysis of the characteristics of fragment ejection, then, characteristics of fragment ejection was studied by finite element software. Herein, comparative analysis initiation modes and mezzanine charge which have an impact on the characteristics of Fragment ejection of the sector charge structure. By change the initiation point position and varying the thickness of the high explosive in mezzanine charge structure, with summary，various design parameters influence of spatial and velocity distributions of the fragments scattering has been found. Finally, lethality comprehensive experimental research was adopted to verify the reliability of numerical simulation, and received relevant conclusions. Research shows that, by setting the multi-point initiation or mezzanine charge can have effectively change to the fragments scattering characteristics of the sector charge structure. Multi-point initiation does not change the effective fragmentation rate(A percentage of fragments which in Localized Damage), but with increasing distance from the initiation point, the average velocity and effective fragmentation average velocity decline. Mezzanine charge structure herein not only increased the effective fragmentation rate but also increased average velocity and effective fragmentation average velocity. With the increase of the thickness of high explosive, the effective fragmentation rate decline, average velocity and effective fragmentation average velocity decrease after an initial increase.
Keywords; Sector charge Aimed Warhead multi-point initiation mezzanine charge characteristics of fragment ejection
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