-
摘要: 应用二维Lagrangian有限元程序EPFT101对超高速发射装置作数值模拟设计。对速度超过10 km/s的发射飞片作了系统研究。为防止飞片的破碎和熔化，采用密度梯度结构装置冲击固定飞片，为使固定飞片达到最大的可能发射速度，采用了筒的延伸技术，并通过数值模拟，优化了超高速发射条件。计算结果表明，当密度梯度结构装置的初始冲击速度为5.8 km/s（或6.0 km/s）时，1.063 g钛合金飞片的速度可达到10 km/s以上。飞片的纵横比为0.3。Abstract: Hypervelocity launchers (HVL) were simulated using a two-dimensional Lagrangian finite element code EPFT101. In the simulation model, a graded-density assembly is used to prevent the melting and fracturing of flier plates. Barrel extension method is adopted to increase launch velocity. The parameters of HVL were also optimized. As an example, the final velocity of a 1.063 gram titanium alloy flier plate impacted by a graded-density assembly at 5.8 km/s was predicted to be about 10 km/s.
-
Key words:
- graded-density /
- hypervelocity launcher /
- finite element code
-
Chhabildas L C, Reinhart W D, Hall C A, et al. Launch Capabilities to 16 km/s [R]. SAND94-1272, 1994. Chhabildas L C, Barker L M, Asay J R, et al. Launch Capabilities to over 10 km/s [A]. Shock Waver in Condensed Matter-1991 [C]. Amsterdam: Elsevier Science Publishers B V, 1992. Tmcano T G, Chhabildas L C. Computational Design of Hypervelocity Launchers [J]. J Impact Eng, 1995, 17: 849-860. Chhabildas L C, Trucano T G, Reinhart W D, et al. Chunk Projectile Launch Using the Sandia Hypervelocity Launcher Facility [R]. SAND 94-1273, 1994. -
点击查看大图
计量
- 文章访问数: 7136
- HTML全文浏览量: 504
- PDF下载量: 682
下载:
