Korean Journal of Computational Design and Engineering (한국CDE학회논문집)

Society for Computational Design and Engineering (한국CDE학회)
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Computation of Nonlinear Hydrostatic Force and Position of a Floating Structure Considering the Coupled Large Inclined Angles

연성된 과대 경사 각도를 고려한 부유식 구조물의 비선형 유체정역학 힘과 자세

  • Cha, Ju-Hwan (Dep. of Ocean Engineering, Mokpo National University) ;
  • Ku, Namkug (Dep. of Naval Architecture and Ocean Engineering, Dong-Eui University) ;
  • Park, Kwang-Phil (Ship & Ocean Research Institute, Daewoo Ship & Marine Engineering)
  • 차주환 (목포대학교 해양시스템공학과) ;
  • 구남국 (동의대학교 조선해양공학과) ;
  • 박광필 (대우조선해양 특수성능연구소)
  • Received : 2015.12.21
  • Accepted : 2016.01.20
  • Published : 2016.03.01
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Abstract

When ships and offshore plants are flooded or the floating crane is equipped with a heavy object, these floating structures are excessively inclined. In this case, immersion, heel, and trim affecting the hydrostatic restoration performance are very large and are coupled each other. In this paper, in order to calculate a static equilibrium position of floating structures with excessive inclination, the nonlinear governing equations were constructed by sequential linearization. In the governing equation, the immersion, heel, and trim are fully coupled, and the equations are represented using a plane area, a primary moment, and a moment of inertia of the water plane area. Therefore, it is possible to calculate the additional factor related the water plane area for estimating stability. Position and orientation of the floating structure are obtained by iterative calculation. The calculated results are compared with the previous studies in the aspect to the performance and the accuracy.

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References

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