International Journal of Naval Architecture and Ocean Engineering

  • 제10권3호
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  • Pages.259-269
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  • 2018
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  • 2092-6782(pISSN)
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  • 2092-6790(eISSN)
대한조선학회 (The Society of Naval Architects of Korea)
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Prediction of the wave induced second order vertical bending moment due to the variation of the ship side angle by using the quadratic strip theory

  • Kim, Seunglyong (School of Naval Architecture and Ocean Engineering, University of Ulsan) ;
  • Ryue, Jungsoo (School of Naval Architecture and Ocean Engineering, University of Ulsan) ;
  • Park, In-Kyu (School of Naval Architecture and Ocean Engineering, University of Ulsan)
  • 투고 : 2016.11.28
  • 심사 : 2017.07.12
  • 발행 : 2018.05.31
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초록

In this study, the second order bending moment induced by sea waves is calculated using the quadratic strip theory. The theory has the fluid forcing terms including the quadratic terms of the hydrodynamic forces and the Froude-Krylov forces. They are applied to a ship as the external forces in order to estimate the second order ship responses by fluid forces. The sensitivity of the second order bending moment is investigated by implementing the quadratic terms by varying the ship side angle for two example ships. As a result, it was found that the second order bending moment changes significantly by the variation of the ship side angle. It implies that increased flare angles at the bow and the stern of ships being enlarged would amplify their vertical bending moments considerably due to the quadratic terms and may make them vulnerable to the fatigue.

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참고문헌

  1. Betts, C.V., Bishop, R.E.D., Price, W.G., 1974. The symmetric generalised fluid forces applied to a ship in a seaway. Trans. RINA 119.
  2. Bishop, R.E.D., Price, W.G., 1979. Hydro-Elasticity of Ships. Cambridge University Press.
  3. Cuthill, E.H., Henderson, F.M., 1925. Description and Usage of General Bending Response Code 1 (GBRC1).
  4. Flokstra, C., 1974. Comparison of ship motion theories with experiments for a containership. Int. Shipbuild. Prog. 21, 168-189. https://doi.org/10.3233/ISP-1974-2123802
  5. Fujino, M., Yoon, B.S., 1985. A study on wave loads acting on a ship in large amplitude waves. J. Soc. Nav. Archit. Jpn. 157, 155-167.
  6. Gerritsma, J., Beukelman, W., 1964. The distribution of the hydrodynamic forces on a heaving and pitching ship model in still water. In: Fifth Symposium on Naval Hydrodynamics, pp. 219-251.
  7. Heo, K.-U., Koo, W., Park, I.-K., Ryue, J., 2016. Quadratic strip theory for high-order dynamic behavior of a large container ship with 3D flow effects. Int. J. Nav. Archit. Ocean Eng. 8 (2), 127-136. https://doi.org/10.1016/j.ijnaoe.2015.11.001
  8. Jensen, J.J., Pedersen, P.T., 1979. Wave induced bending moments in ships e a quadratic theory. In: R. Inst. Nav. Archit. Supplementary Papers, pp. 151-166.
  9. Longuet-Higgins, M.S., 1963. The effect of non-linearities on statistical dis- tributions in the theory of sea waves. J. Fluid Mech. 17 (3), 459-480. https://doi.org/10.1017/S0022112063001452
  10. Porter, W.R., 1961. Pressure Distributions, Added-mass and Damping Co- efficients for Cylinders Oscillating in a Free Surface. University of California at Berkeley (Doctoral Thesis).
  11. Tasai, F., 1960. On the Damping Force and Added Mass of Ships Heaving and Pitching. University of California at Berkeley Institute of Engineering Research.
  12. Tasai, F., Koterayama, W., 1976. Nonlinear hydrodynamic forces acting on cylinders heaving on the surface of a fluid. Report of research institute for applied mechanics. Kyushu Univ. 12 (77), 1-39.
  13. Vugts, J.H., 1968. The Hydrodynamic Coefficients for Swaying, Heaving and Rolling Cylinders in a Free Surface. Report No. 194.
  14. Xia, J., Wang, Z., Jensen, J.J., 1998. Non-linear wave loads and ship responses by a time-domain strip theory. Mar. Struct. 11, 101-123. https://doi.org/10.1016/S0951-8339(98)00008-2