Numerical Study on the Explosive Separation of Pyrotechnic Cutter
Pyrotechnic cutters are widely used in the wrapping-band connecting structures of carrier rockets. In this article, a three-dimensional (3D) finite element model of a pyrotechnic cutter is proposed to determine the influence of the explosive dynamic fracture process and the cutter blade acceleration...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-01-01
|
| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2019/2457854 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850174059445223424 |
|---|---|
| author | Shihui Xiong Yaokun Ye Yanhua Li Yuquan Wen |
| author_facet | Shihui Xiong Yaokun Ye Yanhua Li Yuquan Wen |
| author_sort | Shihui Xiong |
| collection | DOAJ |
| description | Pyrotechnic cutters are widely used in the wrapping-band connecting structures of carrier rockets. In this article, a three-dimensional (3D) finite element model of a pyrotechnic cutter is proposed to determine the influence of the explosive dynamic fracture process and the cutter blade acceleration distance on the cutting effect, using AUTODYN finite element simulation software. Numerical simulations of the cutting process reveal that the initial shear speed, the maximal speed, and the speed at which the cutter connects the rod increase linearly with increasing distance between the cutter blade and the cutting board. As the distance increases, the difference between the initial cutting speed and the maximal speed of the cutter gradually decreases and effectively disappears for a distance of 8.5 mm. At this time, the acceleration effect of the gunpowder gas on the cutter is nearly maximal. When the distance between the cutter and the connecting rod is less than 7.5 mm, the cutting time decreases significantly with increasing spacing. For distances between 7.5 mm and 8.5 mm, the distance has little effect on the cutting time as it increases. There is a small increase in the cutting time, and it can be seen that there is an optimal distance between the cutter and the cutting board during the cutting process. The cutting effect is the strongest for this distance. For the cutter studied in this article, the optimal distance was 7.5 mm. In addition, numerical studies were also performed by varying the maximal cutting diameter of the connecting rod of the pyrotechnic cutter. The discrepancy between the simulation results and actual test data was under 10%, and the simulation result for the cut state of the connecting rod was also consistent with the test result. The simulation results in this article can deepen the understanding of the action mechanism and process of the pyrotechnic cutter and reveal the maximal cutting diameter of the connecting rod of the pyrotechnic cutter under different charging conditions. This provides a reference for future cutter design optimization. |
| format | Article |
| id | doaj-art-c7db30379cbe44bcb01abb7727e8a583 |
| institution | OA Journals |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-c7db30379cbe44bcb01abb7727e8a5832025-08-20T02:19:44ZengWileyShock and Vibration1070-96221875-92032019-01-01201910.1155/2019/24578542457854Numerical Study on the Explosive Separation of Pyrotechnic CutterShihui Xiong0Yaokun Ye1Yanhua Li2Yuquan Wen3State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, ChinaBeijing Institute of Spacecraft System Engineering, Beijing 100094, ChinaState Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, ChinaState Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, ChinaPyrotechnic cutters are widely used in the wrapping-band connecting structures of carrier rockets. In this article, a three-dimensional (3D) finite element model of a pyrotechnic cutter is proposed to determine the influence of the explosive dynamic fracture process and the cutter blade acceleration distance on the cutting effect, using AUTODYN finite element simulation software. Numerical simulations of the cutting process reveal that the initial shear speed, the maximal speed, and the speed at which the cutter connects the rod increase linearly with increasing distance between the cutter blade and the cutting board. As the distance increases, the difference between the initial cutting speed and the maximal speed of the cutter gradually decreases and effectively disappears for a distance of 8.5 mm. At this time, the acceleration effect of the gunpowder gas on the cutter is nearly maximal. When the distance between the cutter and the connecting rod is less than 7.5 mm, the cutting time decreases significantly with increasing spacing. For distances between 7.5 mm and 8.5 mm, the distance has little effect on the cutting time as it increases. There is a small increase in the cutting time, and it can be seen that there is an optimal distance between the cutter and the cutting board during the cutting process. The cutting effect is the strongest for this distance. For the cutter studied in this article, the optimal distance was 7.5 mm. In addition, numerical studies were also performed by varying the maximal cutting diameter of the connecting rod of the pyrotechnic cutter. The discrepancy between the simulation results and actual test data was under 10%, and the simulation result for the cut state of the connecting rod was also consistent with the test result. The simulation results in this article can deepen the understanding of the action mechanism and process of the pyrotechnic cutter and reveal the maximal cutting diameter of the connecting rod of the pyrotechnic cutter under different charging conditions. This provides a reference for future cutter design optimization.http://dx.doi.org/10.1155/2019/2457854 |
| spellingShingle | Shihui Xiong Yaokun Ye Yanhua Li Yuquan Wen Numerical Study on the Explosive Separation of Pyrotechnic Cutter Shock and Vibration |
| title | Numerical Study on the Explosive Separation of Pyrotechnic Cutter |
| title_full | Numerical Study on the Explosive Separation of Pyrotechnic Cutter |
| title_fullStr | Numerical Study on the Explosive Separation of Pyrotechnic Cutter |
| title_full_unstemmed | Numerical Study on the Explosive Separation of Pyrotechnic Cutter |
| title_short | Numerical Study on the Explosive Separation of Pyrotechnic Cutter |
| title_sort | numerical study on the explosive separation of pyrotechnic cutter |
| url | http://dx.doi.org/10.1155/2019/2457854 |
| work_keys_str_mv | AT shihuixiong numericalstudyontheexplosiveseparationofpyrotechniccutter AT yaokunye numericalstudyontheexplosiveseparationofpyrotechniccutter AT yanhuali numericalstudyontheexplosiveseparationofpyrotechniccutter AT yuquanwen numericalstudyontheexplosiveseparationofpyrotechniccutter |