Blast wave characteristics of multi-layer composite charge: Theoretical analysis, numerical simulation, and experimental validation
This article investigates the characteristics of shock wave overpressure generated by multi-layer composite charge under different detonation modes. Combining dimensional analysis and the explosion mechanism of the charge, a peak overpressure prediction model for the composite charge under single-po...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2023-01-01
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| Series: | Defence Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S221491472100218X |
| _version_ | 1828068312418877440 |
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| author | Jun-bao Li Wei-bing Li Xiao-wen Hong Jia-xin Yu Jian-jun Zhu |
| author_facet | Jun-bao Li Wei-bing Li Xiao-wen Hong Jia-xin Yu Jian-jun Zhu |
| author_sort | Jun-bao Li |
| collection | DOAJ |
| description | This article investigates the characteristics of shock wave overpressure generated by multi-layer composite charge under different detonation modes. Combining dimensional analysis and the explosion mechanism of the charge, a peak overpressure prediction model for the composite charge under single-point detonation and simultaneous detonation was established. The effects of the charge structure and initiation method on the overpressure field characteristics were investigated in AUTODYN simulation. The accuracy of the prediction model and the reliability of the numerical simulation method were subsequently verified in a series of static explosion experiments. The results reveal that the mass of the inner charge was the key factor determining the peak overpressure of the composite charge under single-point detonation. The peak overpressure in the radial direction improved apparently with an increase in the aspect ratio of the charge. The overpressure curves in the axial direction exhibited a multi-peak phenomenon, and the secondary peak overpressure even exceeded the primary peak at distances of 30D and 40D (where D is the charge diameter). The difference in peak overpressure among azimuth angles of 0–90° gradually decreased with an increase in the propagation distance of the shock wave. The coupled effect of the detonation energy of the inner and outer charge under simultaneous detonation improved the overpressure in both radial and axial directions. The difference in peak overpressure obtained from model prediction and experimental measurements was less than 16.4%. |
| first_indexed | 2024-04-11T00:00:50Z |
| format | Article |
| id | doaj.art-2aebff4ede084bc1815400fd2f0c61d8 |
| institution | Directory Open Access Journal |
| issn | 2214-9147 |
| language | English |
| last_indexed | 2024-04-11T00:00:50Z |
| publishDate | 2023-01-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Defence Technology |
| spelling | doaj.art-2aebff4ede084bc1815400fd2f0c61d82023-01-10T04:06:02ZengKeAi Communications Co., Ltd.Defence Technology2214-91472023-01-011991102Blast wave characteristics of multi-layer composite charge: Theoretical analysis, numerical simulation, and experimental validationJun-bao Li0Wei-bing Li1Xiao-wen Hong2Jia-xin Yu3Jian-jun Zhu4ZNDY of Ministerial Key Laboratory, Nanjing University of Science and Technology, Nanjing, 210094, ChinaZNDY of Ministerial Key Laboratory, Nanjing University of Science and Technology, Nanjing, 210094, China; Corresponding author.Inner Mongolia Metal Material Research Institute, Yantai, 264003, ChinaZNDY of Ministerial Key Laboratory, Nanjing University of Science and Technology, Nanjing, 210094, ChinaChina Ship Development and Design Center, Wuhan 430064, ChinaThis article investigates the characteristics of shock wave overpressure generated by multi-layer composite charge under different detonation modes. Combining dimensional analysis and the explosion mechanism of the charge, a peak overpressure prediction model for the composite charge under single-point detonation and simultaneous detonation was established. The effects of the charge structure and initiation method on the overpressure field characteristics were investigated in AUTODYN simulation. The accuracy of the prediction model and the reliability of the numerical simulation method were subsequently verified in a series of static explosion experiments. The results reveal that the mass of the inner charge was the key factor determining the peak overpressure of the composite charge under single-point detonation. The peak overpressure in the radial direction improved apparently with an increase in the aspect ratio of the charge. The overpressure curves in the axial direction exhibited a multi-peak phenomenon, and the secondary peak overpressure even exceeded the primary peak at distances of 30D and 40D (where D is the charge diameter). The difference in peak overpressure among azimuth angles of 0–90° gradually decreased with an increase in the propagation distance of the shock wave. The coupled effect of the detonation energy of the inner and outer charge under simultaneous detonation improved the overpressure in both radial and axial directions. The difference in peak overpressure obtained from model prediction and experimental measurements was less than 16.4%.http://www.sciencedirect.com/science/article/pii/S221491472100218XBlast wave characteristicsMulti-layer composite chargeDimensional analysisAUTODYN mapping ModelExplosion experiment |
| spellingShingle | Jun-bao Li Wei-bing Li Xiao-wen Hong Jia-xin Yu Jian-jun Zhu Blast wave characteristics of multi-layer composite charge: Theoretical analysis, numerical simulation, and experimental validation Defence Technology Blast wave characteristics Multi-layer composite charge Dimensional analysis AUTODYN mapping Model Explosion experiment |
| title | Blast wave characteristics of multi-layer composite charge: Theoretical analysis, numerical simulation, and experimental validation |
| title_full | Blast wave characteristics of multi-layer composite charge: Theoretical analysis, numerical simulation, and experimental validation |
| title_fullStr | Blast wave characteristics of multi-layer composite charge: Theoretical analysis, numerical simulation, and experimental validation |
| title_full_unstemmed | Blast wave characteristics of multi-layer composite charge: Theoretical analysis, numerical simulation, and experimental validation |
| title_short | Blast wave characteristics of multi-layer composite charge: Theoretical analysis, numerical simulation, and experimental validation |
| title_sort | blast wave characteristics of multi layer composite charge theoretical analysis numerical simulation and experimental validation |
| topic | Blast wave characteristics Multi-layer composite charge Dimensional analysis AUTODYN mapping Model Explosion experiment |
| url | http://www.sciencedirect.com/science/article/pii/S221491472100218X |
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