脉冲激光辐照小尺度空间碎片的影响规律

Influence rules of small scale space debris irradiated by pulse laser

通过建立了激光辐照小尺度空间碎片的物理模型。仿真分析了小尺度碎片的速度增量与激光功率密度的关系,讨论了不同功率密度下激光的有效作用时间以及不同脉宽下激光冲击波的传播波形和到达位置;在此基础上,模拟分析了冲量耦合系数随不同激光脉宽和功率密度的变化规律。结果表明:速度增量随激光功率密度的增加而增加,激光冲击波波形随脉宽增加有明显展宽,且在激光功率密度、脉宽一定条件下短波长可获得更大的冲量耦合系数。

A physical model of small scale space debris irradiated by laser was established. The relation between the speed increment of small scale debris and the laser power density was investigated by numerical simulation,and the laser effective acting time was obtained under different power densities. Further,the waveforms and arriving position of shock wave propagation with different laser pulse widths were analyzed. Finally,the change rules of impulse coupling coefficient with different laser pulse widths and power densities were analyzed. The results indicate that the velocity increments increase with the increase of power density,and the shock wave has obvious broadening effect. Especially,the short wavelength can obtain the larger impulse coupling coefficient when the power density and pulse width are definite.