JEMS Maritime Sci. Ahead of Print: JEMS-80008

Effect of Amplitude Profiles on the Structural Response of Modified Bottom Panels in High-Speed Craft due to Slamming Loads: A Finite Element Method Analysis

Tuswan Tuswan¹, Ahmad Fauzan Zakki¹, Aulia Windyandari², Haris Nubli^3
1Department of Naval Architecture, Faculty of Engineering, Universitas Diponegoro, Semarang 50275, Indonesia
²Industrial Technology Department, Vocational School, Universitas Diponegoro, Semarang, 50275, Indonesia
³School of Mechanical Engineering Sciences, University of Surrey, Guildford, United Kingdom

Slamming phenomena experienced by ships operating under extreme conditions can result in permanent hull deformation, potentially compromising structural integrity. This study investigates the permanent deformation of a 32-m high-speed craft due to slamming load using finite element analysis (FEA). A nonlinear dynamic approach employing Abaqus Explicit was utilized to analyze structural deformation under maximum loads exceeding design limits, considering two pressure amplitude profiles: rectangular and triangular. The findings indicate that the rectangular amplitude produces higher deformation than the triangular profile, with maximum stress concentrated in the bottom chine area of the web frame. A design modification was introduced to mitigate permanent deformation by adding three different plate reinforcements of the web frame in the bottom chine area. The result shows that flat bar C with a hexagonal shape was the most effective in mitigating dynamic loads and reducing deformation. These results underscore the critical role of structural modifications in enhancing ship design, significantly contributing to minimizing permanent deformation caused by slamming in high-speed crafts. The study builds upon existing research on hull strength under dynamic loads and offers practical solutions for improving maritime safety and performance.

Keywords: Engineering, slamming, finite element analysis, high-speed craft, deformation

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