Open Access

ARTICLE

Equivalent Design Methodology for Ship-Stiffened Steel Plates under Ogival-Nosed Projectile Penetration

Yezhi Qin^*, Qinglin Chen^*, Ying Wang, Yingqiang Cai

School of Marine Engineering, Jimei University, Xiamen, 361021, China

* Corresponding Authors: Yezhi Qin. Email: ; Qinglin Chen. Email:

(This article belongs to the Special Issue: Theoretical and Computational Modeling of Advanced Materials and Structures-II)

Computer Modeling in Engineering & Sciences 2025, 144(2), 1883-1906. https://doi.org/10.32604/cmes.2025.066844

Received 18 April 2025; Accepted 11 August 2025; Issue published 31 August 2025

Abstract

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.

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Keywords

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