TY  - EJOU
AU  - Qin, Yezhi 
AU  - Chen, Qinglin 
AU  - Wang, Ying 
AU  - Cai, Yingqiang 

TI  - Equivalent Design Methodology for Ship-Stiffened Steel Plates under Ogival-Nosed Projectile Penetration
T2  - Computer Modeling in Engineering \& Sciences

PY  - 2025
VL  - 144
IS  - 2
SN  - 1526-1506

AB  - The penetration of ogival-nosed projectiles into ship plates represents a complex impact dynamics issue essential for analyzing structural failure mechanisms. Although stiffened plates are vital in ship construction, few studies have addressed the issue of model equivalence under penetration loading. This study employs numerical simulation to validate an experiment with an ogival-nosed projectile penetrating a Q345 steel plate. Four equivalent stiffened plate methods are proposed based on the area, flexural modulus, moment of inertia, and thickness. The results indicate that thickness equivalence (DM4) is unsuitable for penetration-loaded stiffened plates, except under low-speed, non-penetrating through impacts, and yields less accuracy than DM1/DM3. DM1, DM2, and DM3 each perform optimally with specific velocity ranges: DM1 at very low (critical) and high velocities, DM3 at low velocities, and DM2 at high speeds. Furthermore, in penetration scenarios, T-shaped stiffeners can be replaced with rectangular ones, as both exhibit similar failure behaviors and deflection trends, simplifying the design while preserving key structural characteristics. These findings provide valuable insights into the design of protective ship structures.
KW  - Ogival-nosed projectile; stiffened plate; equivalent model design; penetration

DO  - 10.32604/cmes.2025.066844