| 摘要: |
| 运载火箭火工点式分离装置工作时具有强冲击载荷特性，为有效降低冲击峰值，提出了一种基于纳米吸能流体结构的冲击缓冲技术。首先进行纳米吸能流体的吸能原理研究，建立其本构关系，揭示影响其吸能密度的主要因素；其次开展火工装置有限空间内的纳米吸能流体缓冲结构设计；最后通过有限元仿真与试验验证其缓冲性能。试验结果表明，本文设计的基于纳米吸能流体的缓冲结构，吸能密度高达122.8 J/g，冲击力峰值较空载条件下降了59.2%，冲击加速度峰值下降了63.4%。 |
| 关键词: 火工点式分离装置 纳米吸能流体 冲击载荷 缓冲技术 |
| DOI： |
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| 基金项目:国家自然科学基金（41774025，41731066）；国家重点研发计划（2018YFC1505100）;中央高校基本科研业务费专项（300102260106） |
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| Research on Impact Load Buffering Technique of Pyrotechnic Separation Device |
| DONG Longlei,HAN Yi,GUAN Wei,YAN Jian,HU Zhenxing,ZHANG Xi,SUN Hailiang |
| (Xi'an Jiaotong University, School of Aerospace Engineering, Xi'an 710049, China;Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China) |
| Abstract: |
| Pyrotechnic separation device of rocket has strong impact load characteristics during operation. In order to effectively reduce the peak of impact, this paper proposes an impact protection technology based on nano-energy absorbing fluid. Firstly, the energy absorption principle of Nano-Energy-Absorbing fluid is studied, the main factors affecting the energy absorption density are explored, and the constitutive relationship is established. Secondly, the buffering structure design of Nano-Energy-Absorbing fluid in limited space of pyrotechnic separation device is studied. Finally, the impact protection performance is verified by finite element simulation and test. The experimental results show that the energy absorption density of the designed protective structure based on Nano-Energy-Absorbing fluid in this paper is as high as 122.8 J/g, the peak impact force is 59.2% lower than that at no-load, and the peak impact acceleration decreases by 63.4%. |
| Key words: Pyrotechnic separation device Nano-energy absorbing fluid Impact load Buffer technology |