运载火箭连接强度有限元分析研究（英文）

作者：WU Hao; WANG Jingchao; RUI Xing; ZHANG Ling; ZHU Zhentao; YANG Fan; WANG Bin; CHEN Youwei; ZHANG Dengyu; WANG Shuai; YANG Ruisheng; YU Long; WANG Zhuoqun

来源：Aerospace China, 2021, 22(02): 59-64.

The strength of the connection structure has always been a key issue in the structural design of a launch vehicle. In this paper, the finite element analysis method is used for the strength of typical connection structures of a new launch vehicle. The research scope includes the inter-stage connection structure and the bundle connection structure. Aiming at establishing the strength of these two connection structures under flight conditions, we built a refined finite element model, simulated the bolt tensile test and obtained a calculation criteria, and carried out finite element analysis of the connection structures under flight conditions. As a result, we not only established the analysis and evaluation method of the connection structures based on the refined finite element modeling analysis, but also provided a fast numerical simulation design method for the development of the launch vehicle’s connection structures, which greatly improved the design efficiency and reduced the design risk.