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 Sumit Kumar Pal,Ravindra Babu Kudupudi,Mohammed Rabius Sunny,et al.Numerical Investigation of Green Water Loading on Flexible Structures Using Three-Step CFD-BEM-FEM Approach[J].Journal of Marine Science and Application,2018,(3):432-442.[doi:10.1007/s11804-018-0032-6]
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Numerical Investigation of Green Water Loading on Flexible Structures Using Three-Step CFD-BEM-FEM Approach


Numerical Investigation of Green Water Loading on Flexible Structures Using Three-Step CFD-BEM-FEM Approach
Sumit Kumar Pal1 Ravindra Babu Kudupudi1 Mohammed Rabius Sunny12 Ranadev Datta1
Sumit Kumar Pal1 Ravindra Babu Kudupudi1 Mohammed Rabius Sunny12 Ranadev Datta1
1 Department of Ocean Engineering & Naval Architecture, Indian Institute of Technology Kharagpur, Kharagpur 721302, India;
2 Department of Aerospace Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
Green water loadingComputational fluid dynamics3D time domain panel methodFinite element method Newmark-Beta method
In this paper, the effect of green water impact on a flexible structure is studied based on three-step computational fluid dynamics (CFD)-boundary element method (BEM)-finite element method (FEM) approach. The impact due to shipping of water on the deck of the vessel is computed using commercial CFD software and used as an external force in coupled BEM-FEM solver. Other hydrodynamic forces such as radiation, diffraction, and Froude-Krylov forces acting on the structure are evaluated using 3D time domain panel method. To capture the structural responses such as bending moment and shear force, 1D finite element method is developed. Moreover, a direct integration scheme based on the Newmark-Beta method is employed to get the structural velocity, displacement, etc., at each time step. To check the effect of the green water impact on the structure, a rectangular barge without forward speed is taken for the analysis. The influence is studied in terms of bending moment, shear force, etc. Results show that the effect of green water impact on the bow region can be severe in extreme seas and lead to various structural damages. Similarly, it is also verified that vessel motion affects green water loading significantly and therefore one must consider its effect while designing a vessel.


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Received date:2018-1-4;Accepted date:2018-6-2。
Corresponding author:Sumit Kumar Pal,sumitkpal@iitkgp.ac.in
Last Update: 2019-03-05