| 摘要: |
| 针对运载火箭多台发动机并联推力传递结构在工作中力学环境适应性问题，开展了动静耦合动力学计算方法研究。该研究分析了动静耦合机理，并以此为基础，计算了有无静载的结构模态频率和推力传递结构关键部位随机振动响应。结果表明，火箭推力传递结构在大推力作用下，结构的刚度发生改变，进而影响动力学特性。相关研究结果为火箭多台发动机并联推力传递结构动静联合试验提供了参考意义。 |
| 关键词: 多台火箭发动机 推力传递结构 动静耦合 动力学响应 |
| DOI： |
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| 基金项目:国家自然科学基金(12272083) |
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| Dynamic-Static Coupling Method for MultipleParallel Frame of Rockets |
| LI Bin,LIU Hui,ZENG Yaoxiang,CUI Miao,LYU Jun |
| (State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China;Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China) |
| Abstract: |
| Focusing the mechanical environment adaptability on the thrust transmission structure of the manned launch vehicle, the calculation method of dynamic-static coupling is studied. Based on the theoretical analysis of the dynamic-static coupling mechanism, the modal frequencies with and without static loads and the random vibration responses of key parts of thrust transmission structure are calculated. The results show that the stiffness of the rocket thrust transfer structure changes under the action of large thrust, which in turn affects the dynamic characteristics. The results provide a reference for the joint dynamic and static experiments of the multiple parallel frame of rockets. |
| Key words: Multiple rocket engines Thrust transmission structure Dynamic-static coupling Dynamic response |