Protection mechanism of underwater double-hull coated with UHMW-PE subjected to shaped charge

Zhang, Zhifan; Li, Hailong; Wang, Longkan; Zhang, Guiyong; Zong, Zhi; Zhang, Shenhe

doi:10.1016/j.oceaneng.2023.113842

Cited by 11 publications

(1 citation statement)

References 48 publications

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“…To mitigate errors arising from the attenuation of jet penetration velocity, this study employed the AUTODYN solver to numerically simulate the process of a projectile penetrating a liquid composite protective structure at a constant velocity. AUTODYN is a numerical simulation software that utilizes the explicit finite element method and is frequently used for simulating and calculating problems related to high-speed impacts (Zhu et al 2019) shaped charge jet formation (Gu et al 2022, Shi et al 2023) and wave propagation (Zhang et al 2023, Yang et al 2023. Through simulation, the propagation process of the shockwave in the liquid during the projectile's penetration into the liquid composite protective structure was obtained.…”

Section: Simulation Analysismentioning

confidence: 99%

Study on cone angle of shockwave front in liquid composite protective structure

Cai,

Tan,

et al. 2024

Lat. Am. j. solids struct.

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Liquid composite armor has demonstrated excellent performance in protecting against shaped charge jets. Currently, most existing theoretical calculation models for the velocity range of the disturbed jet approximate the cone angle of the shockwave front as the Mach angle. However, indiscriminately equating the cone angle of the shockwave front with the Mach angle can lead to significant errors in the calculated velocity range of the disturbed jet. To address this issue, this study focuses on investigating the variation of the cone angle of the shockwave front within the liquid composite protective structure. Firstly, a dimensional analysis was conducted to determine the functional relationship between the cone angle of the shockwave front and relevant parameters. Then, the process of jet penetrating liquid composite protective structure was simulated by Autodyn. The results demonstrated that the normalized cone angle solely depends on the normalized diameter within the critical angle. By fitting the simulation data, the formula for calculating the cone angle of the shockwave front was derived.

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