通过比较固体火箭发动机的几种典型连接结构,指出采用卡环连接的优势。结合工程实际,开展卡环连接结构设计、有限元仿真分析与单项试验验证,重点解决卡环结构高压变形、结构密封、配合间隙、装配工艺等几个方面的问题。通过单项试验考核及计算,证明卡环连接方案的可行性和设计的合理性。 By comparing several typical solid rocket engine connection structure, pointed out the advantages of the use of snap ring connection. According to engineering practice, the design of snap ring connection structure, finite element simulation analysis and single test verification are carried out, and the problems of high-pressure deformation, structure sealing, mating clearance and assembly process are mainly solved. Through a single test assessment and calculation, to prove the feasibility of the card ring connection scheme and design rationality.