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Investigation on the longitudinal center of gravity effects on a planing hull’s seakeeping parameters at calm water and regular wave by the CFD method
Hamed Amoon1 , Sajad Ardeshiri *2 , Hassan Karimi Baseri3
1- Persian Gulf University
2- Faculty of Mechanics, Malek Ashtar University of Technology
3- Malek Ashtar University of Technology
Abstract:   (21 Views)
The hydrodynamic analysis of high-speed vessels is an important step in hydrodynamic design. To increase the accuracy of seakeeping calculations, studying the effective parameters is important. Uncertainty and error in hydrostatic calculations, such as the accurate determination of the center of gravity in conducting experiments, may affect the results. In this paper, the effect of the location of the center of gravity on the results of numerical simulation of a vessel has been investigated in comparison with laboratory results. For this purpose, the center of gravity of a planning vessel in calm water and regular wave conditions has been investigated in the longitudinal direction by approximately 1% of the vessel’s length forward and aft of the vessel's center of gravity. The results show a significant effect of changing the location of the center of gravity on the navigation results. The results show that changing the center of gravity can have a maximum effect of 5% on the resistance, 20% on the heave, and 9% on the pitch motion of the vessel.
Keywords: Seakeeping, Center of Gravity, Planing hull, Fridsma, Numerical Investigation
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Highlights
  • CCHE2D successfully simulated hydrodynamic and sediment transport processes downstream of the Aras Dam.
  • High flow velocity and bed shear stress were associated with erosion, while low-velocity recirculation zones promoted sediment deposition.
  • Sediment transport was highly sensitive to Manning’s roughness, downstream boundary conditions, and sediment transport formulations.
  • Increasing flow discharge increased sediment transport and altered the spatial distribution of bed shear stress.
  • Groynes reduced sediment transport by up to approximately 34%, demonstrating their effectiveness for sediment management.
 
Type of Study: Research Paper | Subject: Ship Hydrodynamic
Received: 2025/08/24 | Accepted: 2026/09/6
فایل صوتی چکیده مقاله [MP3 1907 KB]  (1 Download)
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International Journal of Maritime Technology is licensed under a

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