Study on Vulnerability Model of Spacecraft Impacting by Orbital Debris

The spacecraft was studied. Spacecraft vulnerability was analyzed in some aspects as environment, representative structure, aviation theory, damage principle and existence speciality. Then the destruction types were advanced on debris against double plates. The damage types included local perforation and avulsion. And the respective lethality model was put forward. At last the damage probability was obtained when one fragment impacts the double boards by hypervelocity. It is a certain reference and important reality signification, that the vulnerability analysis and lethality mathematical model of spacecraft are researched, to strengthen our space defense ability.