Simulation and Experimental Study on Jetting Projectile Charge Penetrating Multi-Layer Spaced Targets with Large Spacing
To study the ability of shaped charges to penetrate typical ship targets, two shaped charges with the same diameter of 200 mm but different configurations are designed to generate two forms of jetting projectile charge (JPC). Based on the protective structure of typical ship targets, static penetrat...
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| Format: | Article |
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MDPI AG
2023-05-01
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| Series: | Machines |
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| Online Access: | https://www.mdpi.com/2075-1702/11/5/526 |
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| author | Long Ji Xin Jia Jiahui Guo You’er Cai Ping Wang Zhengxiang Huang |
| author_facet | Long Ji Xin Jia Jiahui Guo You’er Cai Ping Wang Zhengxiang Huang |
| author_sort | Long Ji |
| collection | DOAJ |
| description | To study the ability of shaped charges to penetrate typical ship targets, two shaped charges with the same diameter of 200 mm but different configurations are designed to generate two forms of jetting projectile charge (JPC). Based on the protective structure of typical ship targets, static penetration tests are performed using the two types of a shaped charge with copper liner and 10-layer spaced targets with a total span of 16 m which is made in 921A steel. Numerical simulations under the same working conditions are also carried out. It is found that the simulation results of the penetration depth and the number of layers of target perforated by the JPC are much greater than the experimental results. In fact, the JPC breaks up when moving to a certain distance, and the JPC segments after breakup have a transverse drift velocity, causing the segment to deviate from the original penetrating channel. The influence of drift velocity after JPC fracture cannot be considered in numerical simulation, resulting in significant differences between numerical simulation and experimental results. Thus, this paper proposed a segment-based numerical simulation method and analyzed the penetration process of JPC fragments after JPC fracture. Combined with experimental results, the radial motion after JPC fracture and the final distribution of penetration holes can be well revealed. It is found that the penetration depth and the number of layers of target perforated by the JPC depend on the tip velocity of each segment and the jet length. |
| first_indexed | 2024-03-11T03:33:20Z |
| format | Article |
| id | doaj.art-44cb43c2330440babf2483e4803a8e67 |
| institution | Directory Open Access Journal |
| issn | 2075-1702 |
| language | English |
| last_indexed | 2024-03-11T03:33:20Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Machines |
| spelling | doaj.art-44cb43c2330440babf2483e4803a8e672023-11-18T02:11:25ZengMDPI AGMachines2075-17022023-05-0111552610.3390/machines11050526Simulation and Experimental Study on Jetting Projectile Charge Penetrating Multi-Layer Spaced Targets with Large SpacingLong Ji0Xin Jia1Jiahui Guo2You’er Cai3Ping Wang4Zhengxiang Huang5Xi’an Modern Control Technology Research Institute, Xi’an 710018, ChinaSchool of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaSchool of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaSchool of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaXi’an Modern Control Technology Research Institute, Xi’an 710018, ChinaSchool of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaTo study the ability of shaped charges to penetrate typical ship targets, two shaped charges with the same diameter of 200 mm but different configurations are designed to generate two forms of jetting projectile charge (JPC). Based on the protective structure of typical ship targets, static penetration tests are performed using the two types of a shaped charge with copper liner and 10-layer spaced targets with a total span of 16 m which is made in 921A steel. Numerical simulations under the same working conditions are also carried out. It is found that the simulation results of the penetration depth and the number of layers of target perforated by the JPC are much greater than the experimental results. In fact, the JPC breaks up when moving to a certain distance, and the JPC segments after breakup have a transverse drift velocity, causing the segment to deviate from the original penetrating channel. The influence of drift velocity after JPC fracture cannot be considered in numerical simulation, resulting in significant differences between numerical simulation and experimental results. Thus, this paper proposed a segment-based numerical simulation method and analyzed the penetration process of JPC fragments after JPC fracture. Combined with experimental results, the radial motion after JPC fracture and the final distribution of penetration holes can be well revealed. It is found that the penetration depth and the number of layers of target perforated by the JPC depend on the tip velocity of each segment and the jet length.https://www.mdpi.com/2075-1702/11/5/526spaced targetsmulti-layer targetsjetting projectile chargesimulationtransverse drift |
| spellingShingle | Long Ji Xin Jia Jiahui Guo You’er Cai Ping Wang Zhengxiang Huang Simulation and Experimental Study on Jetting Projectile Charge Penetrating Multi-Layer Spaced Targets with Large Spacing Machines spaced targets multi-layer targets jetting projectile charge simulation transverse drift |
| title | Simulation and Experimental Study on Jetting Projectile Charge Penetrating Multi-Layer Spaced Targets with Large Spacing |
| title_full | Simulation and Experimental Study on Jetting Projectile Charge Penetrating Multi-Layer Spaced Targets with Large Spacing |
| title_fullStr | Simulation and Experimental Study on Jetting Projectile Charge Penetrating Multi-Layer Spaced Targets with Large Spacing |
| title_full_unstemmed | Simulation and Experimental Study on Jetting Projectile Charge Penetrating Multi-Layer Spaced Targets with Large Spacing |
| title_short | Simulation and Experimental Study on Jetting Projectile Charge Penetrating Multi-Layer Spaced Targets with Large Spacing |
| title_sort | simulation and experimental study on jetting projectile charge penetrating multi layer spaced targets with large spacing |
| topic | spaced targets multi-layer targets jetting projectile charge simulation transverse drift |
| url | https://www.mdpi.com/2075-1702/11/5/526 |
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