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Volume 17, Issue 34 (12-2021)                   marine-engineering 2021, 17(34): 133-142 | Back to browse issues page

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Najafi M R, Yarmohammadi M J. Investigation of hydrodynamic forces on a floating sample of catamaran with emphasis on modal analysis, added mass and added damping. marine-engineering. 2021; 17 (34) :133-142
URL: http://marine-eng.ir/article-1-936-en.html
1- Imam Hosein University
2- Shahid Beheshti University
Abstract:   (265 Views)
Estimation of the hydrodynamic forces due to the motion of the ship on wave and the resulting vibrational response is of great importance in the design procedure of ship structure. In this paper, modal analysis and force study of loads on the catamaran float in the frequency and time domain and in the direction of Heave and Pitch and taking into account the inherent damping of the hull has been done. In proposed analyzes, the forces acting on the vessel such as Frude-Krylov, diffraction, added mass and damping are investigated. Then, using the finite element method and using the structure-fluid interaction method, the ship motion is modeled on regular waves. By examining the simulation results and comparing it with the past numerical-experimental methods, it can be seen that the obtained results have a good accuracy and also an error of less than 10%, so the proposed method can be used to estimate the forces on the ship.
Full-Text [PDF 863 kb]   (117 Downloads)    
Type of Study: Research Paper | Subject: Ship Hydrodynamic
Received: 2021/10/23 | Accepted: 2021/12/4

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