固体火箭发动机锥形壳体外压稳定性分析  

Buckling analysis on conical shell of solid rocket motor under external pressure

作　　者：余文学[1] 徐秉恒[1] 刘洪超[1] 单琳[1] 

机构地区：[1]中国航天科技集团公司四院四十一所,西安710025

出　　处：《固体火箭技术》2014年第4期551-555,562,共6页Journal of Solid Rocket Technology

摘　　要：通过外压屈曲计算及外压试验,研究了某固体火箭发动机锥形壳体的外压稳定性。通过外压屈曲计算,得到了壳体的外压临界载荷、屈曲失稳波形、轴向位移以及径向位移随外压载荷的变化规律。对带加强环壳体也进行了外压稳定性分析。对比计算结果发现,虽然壳体的外压承受能力较低,但加强环可有效地提高壳体的外压承载能力。之后,还分析了在加强环总长度不变的情况下,不同加强环分布形式壳体的外压承载能力,得出均布4个加强环的壳体为较优选择。壳体的外压试验所得临界外压载荷与计算结果较吻合。Stability of solid rocket motor＆#39;s conical shell under external pressure was investigated through buckling analysis and tests. The variation buckle load, mode, axial displacement and radial displacement curves with external pressure were obtained from buckling analysis of the shell. The buckling analysis on shell with reinforcement ring was also made. Calculated results reveal that reinforcement ring improves the stability of shell under external pressure. The buckling analysis in different distribution of reinforcement ring was also made. And the calculated results reveal that the shell with 4 reinforcement ring is a good choice when the length of reinforcement ring is a constant. Critical buckling load obtained from tests agrees well with the calculated results.

关 键 词：壳体 外压 加强环 临界失稳载荷 

分 类 号：V438[航空宇航科学与技术—航空宇航推进理论与工程]