| 摘要: |
| 基于有限元仿真优化设计手段，经拓扑优化、局部细化设计，提出了一种大悬臂、高刚度异型发动机隔热罩结构，此结构的动刚度1阶频率达到了总体指标要求。经试验验证，该结构的动刚度频率和仿真结果一致，为后续此类结构的设计提供了一种有效的思路和方法。 |
| 关键词: 发动机隔热罩 异型 有限元 优化设计 |
| DOI： |
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| 基金项目: |
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| Optimal Design of a Large Cantilever, High Rigidity and Special-Shaped Engine Heat Shield Structure |
| LI Tianjiao,LIU Liming,WANG Wei,CAO Yu,Li Zechen,YAO Ruijuan |
| (Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China;China Academy of Launch Vehicle Technology, Beijing 100076, China) |
| Abstract: |
| Based on finite element simulation and optimal design method, this paper proposes a large cantilever, high stiffness and special-shaped engine heat insulation through topological optimization and local refinement design. The first order frequency of fine stiffness meets the requirements of the overall index. The results show that the dynamic stiffness frequency of the heat shield structure is consistent with the simulation results. Multiple flight tests verify that the adapter works well. This provides design reference for the subsequent more payloads mission. It provides an effective idea for the design of such upper stage structure. |
| Key words: Engine heat shield Special-shaped Finite element Optimal design |