|Table of Contents|

Citation:
　XU Gang DUAN Wen-yang.Time-domain simulation for water wave radiation by floating structures (Part A)[J].Journal of Marine Science and Application,2008,(4):0.
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Time-domain simulation for water wave radiation by floating structures (Part A)

Info

Title:
Time-domain simulation for water wave radiation by floating structures (Part A)
Author(s):
XU Gang DUAN Wen-yang
Affilations:
Author(s):
XU Gang DUAN Wen-yang
Keywords:
time domain simulation floating body IFBC MTF ARB
分类号:
-
DOI:
-
Abstract:
Direct time-domain simulation of floating structures has advantages: it can calculate wave pressure fields and forces directly;and it is useful for coupled analysis of floating structures with a mooring system. A time-domain boundary integral equation method is presented to simulate three-dimensional water wave radiation problems. A stable form of the integration free-surface boundary condition (IFBC) is used to update velocity potentials on the free surface. A multi-transmitting formula (MTF) method with an artificial speed is introduced to the artificial radiation boundary (ARB). The method was applied to simulate a semi-spherical liquefied natural gas (LNG) carrier and a semi-submersible undergoing specified harmonic motion. Numerical parameters such as the form of the ARB,and the time and space discretization related to this method are discussed. It was found that a good agreement can be obtained when artificial speed is between 0.6 and 1.6 times the phase velocity of water waves in the MTF method. A simulation can be done for a long period of time by this method without problems of instability,and the method is also accurate and computationally efficient.

References:

  1. ISAACSON M.CHEUNG K F Time-domain solution for second-order wave diffraction 1990(02)
  2. ISAACSON M.CHEUNG K F Time-domain second-order wave diffraction in three dimensions 1992(05)
  3. ISAACSON M.NG J Y T Time-domain second-order wave radiation in two dimensions 1993(01)
  4. ISAACSON M.NG J Y T.CHEUNG K F Second-order wave radiation of three-dimensional bodies by time-domain method 1993(04)
  5. NG J Y T.ISAACSON M Second-order wave interaction with two-dimensional floating bodies by a time-domain method 1993
  6. BAI W.TENG B Second-order wave diffraction around 3-D bodies by a time-domain method [期刊论文] -China Ocean Engineering2001(01)
  7. WANG C Z.WU G X Time domain analysis of second-order wave diffraction by an array of vertical cylinders 2007(04)
  8. WU G X.TAYLOR R E The coupled finite element and boundary element analysis of nonlinear interactions between waves and bodies 2003
  9. ORANSKI I A simple boundary condition for unbounded hyperbolic flows 1976
  10. ISRAELI M.ORSZAG S A Approximation of radiation boundary conditions 1981
  11. CLEMENT A Coupling of two absorbing boundary conditions for 2D time-domain simulations of free surface gravity waves 1996
  12. BOO S Y Linear and nonlinear irregular waves and forces in a numerical wave tank 2002
  13. FORRISTALL G Z Irregular wave kinematics from a kinematic boundary condition fit (KBCF) 1985
  14. LIAO Z P Extrapolation non-reflecting boundary conditions 1996
  15. LIAO Z P Introduction to wave motion theories for engineering 2002
  16. DAI Y S Potential flow theory of ship motions in waves in frequency and time domain 1998
  17. DAI Y S.DUAN W Y Potential flow theory of ship motions in waves 2008
  18. CHEN X B Hydrodynamics in offshore and naval applications-part ? 2004

Memo

Memo:
国家自然科学基金，the 111 Project
Last Update: 2010-06-29