关键词: 火箭发动机喷管;喷管喉部;应力分析;发动机试验;固体火箭发动机

Abstract: The finite-element mothed is used to analyse and to calculate the tra-nsient stress field of graphite insert of composite nozzle under pressure and transient temperature loads in solid rocket motors. The mechanical models,basic methods and computation examples are presented in this paper. The anisotropy of materials is considered in the computation. A compress technique of variable bandwidth is used for the integral stiffness matrix in order to save the main storage. The computation results are compared with the experimental data and they accord with each other well.

Key words: Rocket engine nozzle;Nozzle throat;Stress analysis;Engine test;Solid rocket engine