Characters on kinetics energy of debris cloud in spacecraft

To assess damage by debris cloud after orbital debris impacts and perforates pla te of spacecraft, and to use adequately LS-dyna/SPH(Smoothed Particle Hydrodyna mic) computer simulation result of the orbital debris hypervelocity impacting th e plate, depending on the result about 9.53mm aluminium sphere impacting 2 .2mm aluminium target at 6.64km/s, debris cloud kinetic energy per area (DCP KE) and DCPKE formula was put forwarded after statistically cumulating of debris particles behind plate. DCPKE includes kinetic energy of all particles in debri s cloud and define the damage ability in area of plane behind spacecraft plate perpendicular to the impacting direction. DCPKE can be used to describe rule of debris cloud kinetic energy, which decrease with the distance. Depending on co mputer simulation of several impact velocity cases, the DCPKE curves were gained to show difference of impact velocities. DCPKE was also used to analyze materia l strength model influence, it can show quantificationally difference betwee n two material models.