文中设计了固体火箭发动机采用的3种常规喷管与燃烧室壳体的连接结构,建立了3种连接结构的强度计算模型,通过模拟水压试验的预制载荷,分别对3种连接结构进行了静力强度仿真,得到了连接结构中各个零件的应力、应变及变形等结果;从工作安全性和结构密封性能方面,对3种连接方式的优劣进行了分析。结果表明,3种连接结构均能够满足设计使用要求,其中模型C能够承受更高的压力作用;在相同压力载荷水平下,模型B的密封性能最好。

In this paper, finite element modes of three normal joint structures of nozzle and case in solid propellant rocket motor are developed based on finite element software. According to the water pressure test load, the static strength of three joint structures of nozzle and case are analyzed, the results of stress, stain and deformation under the internal pressure have been got. Comparing the results in two sides of security and tightness, the advantages and disadvantages are disused commendably. The results show that the three kinds of joint structure can meet the requirements of design, and the model of C to withstand higher pressure, And under the same pressure, sealed performance is the best model B.