Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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A Study on the Numerical Methodologies of Hydroelasticity Analysis for Ship Springing Problem

스프링잉 응답을 위한 유탄성 해석의 수치기법에 대한 연구

  • 김유일 (대우조선해양(주) 서울대학교 공과대학 조선해양공학과) ;
  • 김경환 (서울대학교 공과대학 조선해양공학과) ;
  • 김용환 (서울대학교 공과대학 조선해양공학과)
  • Published : 2009.06.20
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Abstract

Numerical methodology to solve ship springing problem, which is basically fluid-structure interaction problem, was explored in this study. Solution of this hydroelasticity problem was sought by coupling higher order B-spline Rankine panel method and finite element method in time domain, each of which is introduced for fluid and structure domain respectively. Even though varieties of different combinations in terms of numerical scheme are possible and have been tried by many researchers to solve the problem, no systematic study regarding the characteristics of each scheme has been done so far. Here, extensive case studies have been done on the numerical schemes especially focusing on the iteration method, FE analysis of beam-like structure, handling of forward speed problem and so on. Two different iteration scheme, Newton style one and fixed point iteration, were tried in this study and results were compared between the two. For the solution of the FE-based equation of motion, direct integration and modal superposition method were compared with each other from the viewpoint of its efficiency and accuracy. Finally, calculation of second derivative of basis potential, which is difficult to obtain with accuracy within grid-based method like BEM was discussed.

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References

  1. Aksu, S., 1993, Steady state and transient responses of flexible ship structures traveling in irregular seaway, PhD Thesis, University of Southampton
  2. Bathe, K.J., 1982, Finite Element Procedures in Engineering Analysis, Prentice-Hall
  3. Berlik, O., Bishop, R.E.D. and Price, W.D., 1980, 'On the slamming response of ships to regular head waves,' Transaction of the Royal Institution of Naval Architects, 122, 325-337
  4. Bishop, R.E.D., and Price, W.G., 1979, Hydroelasticity of Ships, Cambridge University Press
  5. Gjelsvik, A., 1981, The Theory of Thin Walled Bars, John Wiley & Sons
  6. Iron, B.M. and Tuck, R.C., 1969, 'A version of the Aitken accelerator for computer iteration,' International Journal of Numerical Methods in Engineering, Vol. 1, pp. 275-277 https://doi.org/10.1002/nme.1620010306
  7. Jensen, J.J. and Pedersen, P.T., 1981, 'Bending moments and shear forces in ships sailing in irregular waves,' Journal of Ship Research, Vol. 24, No. 4, pp. 243-251
  8. Kim, K.H. and Kim, Y., 2007, WISH JIP project report and Manual, Marine Hydrodynamic Laboratory, Seoul National University
  9. Lee, H.Y., Lim, C.G. and Jung, H.B., 2003, 'Hydroelastic responses for a ship advancing in waves,' Journal of the Society of Naval Architects of Korea, Vol. 40, No. 4, pp. 16-21 https://doi.org/10.3744/SNAK.2003.40.4.016
  10. Malenica, S., Molin, B. and Senjanociv, I., Tomasevic, S., Stumpf, E., 2007, 'Some aspects of hydroelastic issues in the design of ultra large container ships' 22nd International Workshop on Water Waves and Floating Bodies, Croatia, pp. 133-136
  11. Matthies, H.G. and Steindorf, J., 2003, 'Partitioned strong coupling algorithms for fluid-structure interaction,' Computers and Structures, 81, pp. 805-812 https://doi.org/10.1016/S0045-7949(02)00409-1
  12. Nakos, D.E., 1990, Ship Wave Patterns and Motions by a Three Dimensional Rankine Panel Method, PhD Thesis, MIT, Cambridge, MA
  13. Ogilvie, T.F. and Tuck, E.O., 1960, A rational strip theory for ship motions, Part I. Technical Report 013, The Department of Naval Architecture and Marine Engineering, The University of Michigan
  14. Pedersen, P.T., 1983, 'A beam model of torsional-bending response of ship hulls,' Transactions of the Royal Institution of Naval Architects, 125, pp. 171-182
  15. Price, W.G. and Wu, Y.S., 1989, 'The influence of nonlinear fluid forces in the time domain responses of flexible SWATH ships excited by a seaway' Proceedings of 8th International Conference on Offshore Mechanics and Arctic Engineering, Vol.2, pp.125-135
  16. Remy, F., Molin, B. and Ledoux, A., 2006, 'Experimental and Numerical Study of the Wave Response of a Flexible Barge,' Hydroelasticity in Marine Technology, Wuxi, China, pp. 255-264
  17. Timman, R. and Newman, J.N., 1962, 'The coupled damping coefficients of symmetric ships,' Journal of Ship Research, Vol. 5, No. 4, pp. 1-7
  18. Wu, J.S. and Ho, C.S., 1987, 'Analysis of wave induced horizontal and torsion coupled vibrations of a ship hull,' Journal of Ship Research, Vol. 31, No. 4, pp. 235-252
  19. Zhao, R. and Faltinsen, O., 1989, 'A discussion of the m-terms in the wave current body interaction problem,' 3rd International Workshop on Water Waves and Floating Bodies, Norway, pp. 275-279