Structural Engineering and Mechanics

  • 제76권3호
  • /
  • Pages.355-365
  • /
  • 2020
  • /
  • 1225-4568(pISSN)
  • /
  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Comparative analysis of fatigue assessment considering hydroelastic response using numerical and experimental approach

  • Kim, Beom-il (Ship and Offshore Technology Center, R&D Institute) ;
  • Jung, Byung-hoon (Ship structure research center, Hyundai maritime research institute, Hyundai heavy industry)
  • 투고 : 2020.02.18
  • 심사 : 2020.06.22
  • 발행 : 2020.11.10
⟨ 이전 논문 다음 논문 ⟩

초록

In this study, considering the hydroelastic response represented by the springing and whipping phenomena, we propose a method of estimating the fatigue damage in the longitudinal connections of ships. First, we screened the design sea states using a load transfer function based on the frequency domain. We then conducted a time domain fluid-structure interaction (FSI) analysis using WISH-FLEX, an in-house code based on the weakly nonlinear approach. To obtain an effective and robust analytical result of the hydroelastic response, we also conducted an experimental model test with a 1/50-scale backbone-based model of a ship, and compared the experimental results with those obtained from the FSI analysis. Then, by combining the results obtained from the hydroelastic response with those obtained from the numerical fatigue analysis, we developed a fatigue damage estimation method. Finally, to demonstrate the effectiveness of the developed method, we evaluated the fatigue strength for the longitudinal connections of the real ship and compared it with the results obtained from the model tests.

키워드

과제정보

The research described in this paper was supported by the Joint Development Project "A study on fatigue assessment for very large vessels considering Springing effect". The authors also wish thank Hyundai Heavy Industry Co. Ltd. for providing the experiment data and supporting their work.

참고문헌

  1. Bishop, R.E.D., Price, W.G. and Zhang, X.C. (1985), "A note on the dynamical behavior of uniform beams having open channel section", J. Sound Vib. 99(2), 155-167. https://doi.org/10.1016/0022-460X(85)90354-2
  2. Choi, E.Y., Cho, J.R., and Jeong, W.B. (2018), "Resonant response of spar-type floating platform in coupled heave and pitch motion", Struct. Eng. Mech., 65(5), 513-521 https://doi.org/10.12989/sem.2018.65.5.513
  3. The international Association of Classification Societies. (2016), UR S11A (Longitudinal Strength Standard for Container Ships), International Association of Classification Societies, London, UK.
  4. Ghandi, E., and Shiri, B. (2017), "On triply coupled vibration of eccentrically loaded thin-walled beam using dynamic stiffness matrix method", Struct. Eng. Mech., 62(6), 759-769 https://doi.org/10.12989/sem.2017.62.6.759
  5. Im, H.I., Nikola, V., Sime, M. and Cho, D.S. (2017), "Hydroelastic response of 19,000TEU class ultra large container ship with novel mobile deckhouse for maximizing cargo capacity", J. Naval Architect. Ocean Eng., 49(4), 339-349. https://doi.org/10.1016/j.ijnaoe.2016.11.004
  6. ISSC (2009), "Report of the ISSC Technical Committee I.2 on Loads", 17th International Ship and Offshore Structures Congress (ISSC), 1, 127-210. Seoul.
  7. Kim, B.H., Choi, B.K., Park, J.S., Park, S.K., Ki, H.K. and Kim, Y.I. (2018), "Full scale measurement data analysis of large container carrier with hydroelastic response, Part II-fatigue damage estimation", J. Soc. Naval Architects Korea, 55(1), 45-55. http://dx.doi.org/10.3744/SNAK.2018.55.1.45
  8. Kim, J.H., Bang, J.S., Kim, Y.I. and Kim, S.J. (2012), "Analysis on the hydroelasticity of whole ship structure by coupling three-dimensional BEM and FEM", J. Soc. Naval Architects Korea, 49(4), 312-326. https://doi.org/10.3744/SNAK.2012.49.4.312
  9. Kim, J.H. and Kim, Y.H. (2014), "Numerical analysis on springing and whipping using fully-coupled FSI models", Ocean Eng., 91, 28-50. https://doi.org/10.1016/j.oceaneng.2014.08.001
  10. Kim, Y.H. and Kim, Y.I. (2011), "WISH-FLEX: Development of prediction method for ship structural hydro-elasticity in waves(springing and slamming-whipping)", Seoul National University Report.
  11. Korean Register (2018), Guidance on Strength Assessment of Container Ships Considering the Whipping Effect, Busan, Korea.
  12. Lee, J.W. and Lee J.Y. (2019), "An exact transfer matrix method for coupled bending and bending vibrations of a twisted Timoshenko beam", Struct. Eng. Mech., 72(6), 797-807. https://doi.org/10.12989/sem.2019.72.6.797
  13. Lee, Y.W. and Spyros E. (2012), "Comparison of springing and whipping responses of model test with predicted nonlinear hydro-elastic analysis", J. Offshore Polar Eng., 22(3).
  14. Lloyd's Register. (2018), Global design loads of container ships and other ships prone to whipping and springing. London. UK.
  15. Malenica, S., Senjanovic. I., Tomaservic S. and Stumpf, E. (2007), "Some aspects of hydroelastic issue in the design of ultra large container ships", Proceedings of 22nd International Workshop on Water Waves and Floating Bodies, Plitvice, Croatia, April. 133-136.
  16. Ogilvie, T.F. and Tuck, E.O. (1969), "A rational strip theory for ship motions, Part 1", Technical Report 013; Department of Naval Architecture and Marine Engineering, The University of Michigan, MI, USA.
  17. Remy, F., Molin, B. and Ledoux, A. (2006), "Experimental and numerical study of the wave response of a flexible barge", Proceedings of 4th International Conference on Hydroelasticity in Marine Technology, Wuxi China, 255-264.
  18. Senjanovic I, Tomaservic S and Vladmir N. (2009), "An advanced theory of thin-walled girders with application to ship vibrations", Marine Struct., 22, 387-437. https://doi.org/10.1016/j.marstruc.2009.03.004.
  19. Storhaug, S., Tomazo G.N., Nelson L.C., Park, S.G., Lee, D.K. and Kim, Y.I. (2011), "First ocean going ships with springing and whipping included in the ship design", Proceeding of the ASME 2011 30th International Conference on Ocean, Offshore and Artic Engineering, Rotterdam, The Netherlands, 19-24. June.
  20. Svein, E.H, Gaute, S. and Choi, B.K. (2011), "Full scale measurement of fatigue and extreme loading including whipping on an 8600TEU post panama container vessel in the Asia to Europe trade", Proceeding of the ASME 2011 30th International Conference on Ocean, Offshore and Artic Engineering, Rotterdam, The Netherlands, 19-24, June.
  21. Timman, R. and Newman, J.N. (1962), "The coupled damping coefficients of asymmetric ship", J. Ship Res., 5(4), 1-7.