碰撞

For evaluating the risk of satellites formation efficiently, quasi maximum instantaneous collision probability was defined. ( 3) Assuming a circular reference orbit, the safety evaluation criteria was figured out based on the collision probability.

为更有效的评估编队卫星碰撞危险程度，定义了拟最大瞬时碰撞率。（3）在圆参考轨道的假设下，基于碰撞概率制定了一套防碰撞安全评判准则。

This paper divides the entire impact motion into two sequential phases: the phase of impact, the other motion of flexible beam.

本文针对柔性梁与刚性地面碰撞问题，把整个碰撞运动过程分为两个互相联系的阶段：碰撞接触阶段和非碰撞期间的柔性梁运动阶段。

Utilize a program to make the numerical simulation for the impact, has observed multi impact and multi sub-impact in a macrography impact, obtained the dynamics of beam and column and the time history of impact force in the total process.

利用编制的程序对碰撞过程进行了数值仿真，观察到了多次撞击以及一次宏观撞击中多次微碰撞的现象，得出了整个过程中梁、柱的动力学响应和碰撞力的时间历程。