Abstract: The main contents of this paper are the research and calculation of the separating action reliability of themissile and its adapters. After establishing the dynamic and kinematic equations of the adapters during its separatingaction, the authors analyse the random factors which have effects on the reliability of separating action, and definethe random variables according to the engineering condition. In order to calculate the reliability of the separating action, a failure criterion is defined, and the G-function is established according to the response surface method. Atlast, the reliability of the separating action is calculated by using the first-order second-moment method and MonteCarlo method. The results show that the method can satisfy the missile engineering developing requirements.

Key words: reliability, missile, adapters, separating action