Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Time Domain Analysis of Ship Motion in Waves Using Finite Element Method

유한요소법을 이용한 파랑 중 선박운동의 시간영역 해석기법 개발

  • Nam, Bo-Woo (Maritime & Ocean Engineering Research Institute, KORDI) ;
  • Sung, Hong-Gun (Maritime & Ocean Engineering Research Institute, KORDI) ;
  • Hong, Sa-Young (Maritime & Ocean Engineering Research Institute, KORDI)
  • 남보우 (한국해양연구원 해양시스템안전연구소) ;
  • 성홍근 (한국해양연구원 해양시스템안전연구소) ;
  • 홍사영 (한국해양연구원 해양시스템안전연구소)
  • Published : 2009.02.27
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Abstract

The three-dimensional ship motion with forward speed was solved by a finite element method in the time domain. A boundary value problem was described in the frame of a fixed-body reference, and the problem was formulated according to Double-Body and Neumann-Kelvin linearizations. Laplace's equation with boundary conditions was solved by a classical finite element method based on the weak formulation. Chebyshev filtering was used to get rid of an unwanted saw-tooth wave and a wave damping zone was adopted to impose a numerical radiation condition. The time marching of the free surface was performed by the 4th order Adams-Bashforth-Moulton method. Wigley I and Wigely III models were considered for numerical validation. The hydrodynamic coefficients and wave exciting forces were validated by a comparison with experimental data and the numerical results of the Wigley I. The effects of the linearization are also discussed. The motion RAO was also checked with a Wigley III model through mono-chromatic and multi-chromatic regular waves.

Keywords

References

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