PDF
Full
Outline
To investigate the damage characteristics of supercavitating projectiles against underwater structures, we conducted a simulation study of a 12.7 mm supercavitating projectile impacting typical targets at different speeds. The reliability of the simulation model was verified based on experimental results, and a detailed analysis of the projectile-target penetration characteristics under full water conditions was performed. The results show that compared to the unreinforced curved target, the ballistic limit velocity of the weakest unreinforced part of the reinforced curved target increased by 3.1%, and the surface depression caused by water load squeezing decreased by 27.3%. As the projectile velocity increases, the energy absorption ratio of the target plate before penetration increases to varying degrees, but the unreinforced curved target is most affected by the water load before penetration. Under the same projectile velocity, the reinforced curved target effectively restrained the overall deformation of the target plate, but its crack growth energy consumption was greater than that of the unreinforced curved target, leading to a deeper crack propagation along the target thickness. The higher the projectile velocity is, the narrower the crack extension around the hole is, indicating reduced crack growth energy consumption, with bending energy dissipation becoming dominant. The results can offer guidance for the design of underwater structures.
PDF
135
53
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
