关键词: 推进剂药柱;强度;可靠性预计

Abstract: In ths paper, the random distribution of load on solid missile during flying and transportation is analysed. The reiabilily model of accumulative damage to grain Strength is deduce, and the reliability calculating model is obtained.This model can offer a reference for calculating quantitatively the strength reliability of the solid missile during flying and transportation. A example is presented in this paper and the calculating results agree well with the practical situation.

Key words: Propellant grain;Strength;Reliability prediction