扇形装药结构预制破片飞散控制研究
时间:2019-10-29 21:46 来源:毕业论文 作者:毕业论文 点击:次
| 摘要 扇形装药是应用于展开式定向战斗部的一种装药结构，由于起爆方式和装药结构对破片飞散有着重要的影响，带来的毁伤效果也不同，所以本文首先用初速公式和破片飞散角定义，理论性的分析了破片飞散特性，其次利用有限元分析软件对破片飞散过程进行研究了，对比分析了起爆方式及夹层装药对扇形装药结构破片飞散特性的影响，通过改变起爆点位置和夹层装药结构中高爆速药的厚度，总结得到了各设计参量对破片飞散空间分布和速度分布的影响规律。最后，通过驱动破片飞散试验研究验证了数值仿真的可靠性，并得到相关结论。 研究结果显示，通过设置多点起爆或夹层装药可以有效改变扇形装药结构的破片飞散特性。多点起爆不会改变有效破片率（在定义的杀伤局域内破片占总数的百分比），但随着起爆点距圆心距离的增加，破片平均速度和有效破片的平均速度均降低。而夹层装药结构不仅可以提高有效破片率，还可提高破片平均速度和有效破片的平均速度，随着高爆速药厚度的增加，有效破片率下降，平均速度和有效破片的平均速度先增后减。 41600 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 目次 (责任编辑：qin) |