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| Reliability of Separation Nuts Based on Stress-Intensity Interference Model |
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| DOI：10.7643/issn.1672-9242.2022.12.002 |
| KeyWord:reliability of separation nuts stress-intensity interference model reliability analysis sensitivity |
| Author | Institution |
| NIU Lei |
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing , China |
| DONG Hai-ping |
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing , China |
| ZHAO Xiang-run |
Institute of Pyrotechnics Technology, Liaoning North Huafeng Special Chemical Co., Ltd., Liaoning Fushun , China |
| LI Chao-zhen |
Academy of Opto-electronic, China Electronic Technology Group Corporation, Tianjin , China |
| YAN Nan |
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing , China |
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| Abstract: |
| The work aims to proposea method for reliability analysis of separation nuts based on stress-intensity interference model. Firstly, a separation dynamics model of the separation nut mechanism was established. Then, based on considering the uncertainty of parameters such as working load, geometric size and propellant combustion parameters, a reliability model based on stress-intensity interference model for different separation stages of the separation nuts was established. Finally, the reliability and sensitivity of the separation nuts were analyzed, and the importance of the working load, geometric size and gunpowder combustion parameters on the separation reliability of the separation nut mechanism was quantified. The most important parameters affecting the reliability were powder force, charge density and preload. The example shows that the method can accurately describe the effects of uncertain factors on the reliability of separation nuts during separation, improve the accuracy and efficiency of the quantitative analysis on the separation reliability of the separation nut mechanism, and provide support for fine design of separation nuts. |
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