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A unified computational method for simulating dynamic behavior of planing vessels

Seif, M. S ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. Publisher: 2009
  3. Abstract:
  4. High speed planing hulls have complex hydrodynamic behaviors. The trim angle and drafts are very sensitive to speed and location of the center of gravity. Therefore, motion simulation for such vessels needs a strong coupling between rigid body motions and hydrodynamic analysis. In addition, free surface should be predicted with good accuracy for each time step. In this paper, velocity and pressure fields are coupled by use of the fractional step method. On the basis of integration of the two-phase viscous flow induced stresses over the hull, acting loads (forces and moments) are calculated. With the strategy of boundary-fitted body-attached mesh and calculation of 6-DoF motions in each time step, time history of ship motions including displacements, speeds and accelerations are evaluated. For the demonstration of the software capabilities, circular cylinder slamming is simulated as a simple type of water slamming. Then, a high-speed planing catamaran is investigated in the case of steady forward motion. All of the results are in good concordance with experimental data. The present method can be widely implemented in design as well as in the performance prediction of high-speed vessels. © 2009 Chinese Ocean Engineering Society, ISSN 0890-5487
  5. Keywords:
  6. Center of gravity ; Dynamic behaviors ; Experimental data ; Fractional step methods ; Free surfaces ; High speed vessels ; High-speed ; Hydrodynamic analysis ; Hydrodynamic behavior ; Motion simulations ; Performance prediction ; Planing vessel ; Planing vessels ; Pressure field ; Rigid-body motion ; Ship motion ; Ship motions ; Simple types ; Slamming ; Software capability ; Strong coupling ; Time history ; Time step ; Circular cylinders ; Fluid dynamics ; Hydrodynamics ; Sailing vessels ; Slamming (ships) ; Speed ; Hulls (ship)
  7. Source: China Ocean Engineering ; Volume 23, Issue 3 , 2009 , Pages 517-528 ; 08905487 (ISSN)
  8. URL: http://www.chinaoceanengin.cn/article/id/da733ead-7848-46b9-af95-3cbec5869b9d?pageType=en