Study of destruction of thin film structure by hyper-velocity impact

超高速冲击对薄膜结构破坏的研究

• 批准号: 12450397
• 负责人: SASAKI Susumu
• 金额: $ 5.76万
• 依托单位: The Institute of Space and Astronautical Science/Japan Aerospace Exploration Agency
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12450397/
• 关键词: Large space Structure; Solar power Satellite; Thin film Structure; Hyper-velocity impact; Rail gun; ejector; Impact destruction; 薄膜; アモルファスシリコン太陽電池; 高速度カメラ; 衝撃プラズマ

A large space structure in the future, such as the solar power satellite, will use a thin-film structure. For the large structure in orbit, hyper-velocity impact of the space debris and meteoroid at a velocity more than several km/sec cannot be avoided. This research is aimed to study the hyper-velocity impact on a thin film structure. A rail gun system at the Institute of Space and Astronautical Science has been used for the impact experiment. The rail gun can accelerate a projectile of 1gram made of polycarbonate up to 4〜5 km/sec. In the experiment, the impact destruction and ejectors of the thin film have been studied as well as the destruction of the projectile. It is found that the ejectors expanded in 70 degrees in the forward and lead a serious destruction in the second film, target. The total energy of the ejectors that destroy the second film is in proportion to the mass of ejected thin film and square of the projectile velocity. The plasma which is generated at the impact pro … More pagates at the same velocity of the projectile in the forward, but at a lower velocity, the bipolar diffusion velocity, in the backward. The destroy of the projectile depends on the surface density of the thin film target. For the polycarbonate projectile at 4〜5 km/s, the threshold of the surface density is around 0.1g/cm^2. This threshold corresponds to the compression strength of the projectile if the impact force is assumed to be applied to the projectile during the time for the acoustic wave to propagate in the projectile. The thin film structure to minimize the impact destruction is also studied. It is proved that the scratched structure in the lattice-shape is quite effective to suppress the propagation of the impact destruction. For the reinforced structure in the lattice-shape, the destruction is more serious but is localized in the segment surrounded by the reinforced structure. These results give an important engineering basis for the construction of a large thin film structure in space. Less

将来的大空间结构，例如太阳能卫星，将使用薄膜结构。对于轨道中的大结构，无法避免速度超过几km/sec的空间碎片和流星体的高速影响。这项研究旨在研究对薄膜结构的高速影响。撞击实验已使用了太空与宇航科学研究所的铁路枪系统。铁轨枪可以加速1GRAN的弹丸，该弹丸由聚碳酸酯制成的弹丸高达4-5 km/sec。在实验中，薄膜的冲击破坏和弹出器已经研究了以及弹丸的破坏。发现弹出器在前锋中以70度扩展，并在第二部电影《目标》中造成严重破坏。破坏第二膜的喷射器的总能量与弹出式薄膜的质量和弹丸速度的平方成比例。在冲击Pro上产生的血浆……更多地以弹丸在前弹性的速度为呼射，但在较低的速度下，双极扩散速度在向后。弹丸的破坏取决于薄膜目标的表面密度。对于4-5 km/s的聚碳酸酯弹丸，表面密度的阈值约为0.1g/cm^2。如果假定在声波在弹丸中传播的弹丸，则该阈值对应于弹丸的压缩强度。薄膜结构以最大程度地减少撞击破坏也是研究的。事实证明，晶格形状中的刮擦结构对于抑制撞击破坏的传播非常有效。对于晶格形状的增强结构，破坏更严重，但局部在钢筋结构周围的细分市场中。这些结果为在空间中建造大型薄膜结构提供了重要的工程基础。较少的