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2- Amirkabir University of Technology (Tehran Polytechnic)
2- Amirkabir University of Technology (Tehran Polytechnic)
Abstract: (22 Views)
The slamming phenomenon at the ship bow during navigation in rough seas is one of the most critical causes of stress concentration and structural deformation. The sudden impact of the hull on the water surface generates transient pressure peaks and complex hydroelastic responses. This study aims to investigate the structural and hydroelastic responses of the bow region of a 187-meter container ship under slamming loads, considering the removal of lateral longitudinal bulkheads. A modified structural model of the bow, including the shell and stiffeners with the longitudinal bulkheads removed, was developed. Numerical simulations were performed using a two-way coupling between the Abaqus finite element solver and the STAR-CCM+ computational fluid dynamics solver. The results revealed that the maximum slamming pressure occurred near the bottom of the bow, while the maximum equivalent stress appeared along the bow flare. The removal of the longitudinal bulkheads led to an increase in both the extent and magnitude of stresses, with higher stress concentrations observed in regions with fewer stiffeners. Comparison with the complete structural model indicated that the maximum stress in the lower horizontal sections exhibited smaller differences, less than 10 percent, whereas in the upper sections the discrepancy reached up to 3.7 times. The results demonstrate significant differences between the complete structural configuration and the simplified configuration with removed longitudinal bulkheads, emphasizing the role of longitudinal bulkheads in the structural response of the ship bow under slamming loads.
Keywords: Slamming load, Fluid–structure interaction (FSI), Ship hydroelasticity, Two-way coupling, Ship bow structure
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