Estimation of the Fatigue Damage for an Ice-going Vessel under Broken Ice Condition Part II - Simplified Approach

유빙 하중을 받는 내빙 선박의 피로손상도 추정 Part II - 간이 해석법

  • Kim, Jeong-Hwan (Department of Naval Architecture and Ocean Engineering, College of Engineering, INHA University) ;
  • Kim, Yooil (Department of Naval Architecture and Ocean Engineering, College of Engineering, INHA University)
  • 김정환 (인하대학교 공과대학 조선해양공학과) ;
  • 김유일 (인하대학교 공과대학 조선해양공학과)
  • Received : 2018.10.02
  • Accepted : 2019.01.03
  • Published : 2019.06.20


In this study, a simplified analysis method was developed to evaluate the fatigue damage of an ice-going ship under broken ice condition. The global ice load, which is essentially calculated at the design stage of the Arctic vessel, and the hull form information were used to estimate the local ice load acting on the outer-shell of the ship. The local ice load was applied to the finite element analysis model, and the Weibull parameters for the target fatigue point were derived. Finally, fatigue damage was evaluated by applying the S-N curve and the Palmgren-Miner rule. For the verification of the proposed method, numerical analyses using direct approach were performed for the same conditions. A numerical model that implements the interaction between ice and structure was introduced to verify the local ice load and the stress calculated from the proposed method. Finally, the fatigue analyses of the Baltic Sea for actual ice conditions were performed, and the results of the proposed method, the method using numerical analysis, and the LR method were compared.



  1. Aboulazm, A., 1989. Ship resistance in ice floe covered waters. Ph.D. Memorial University of Newfoundland, Newfoundland, Canada.
  2. Bridges, R., Riska, K. & Zhang, S., 2006. Fatigue assessment for ship hull structures navigating in ice regions. Proceedings of the Icetech 2006. Banff. Canada.
  3. Chai, W., Leira, B. & Naess, A., 2018. Short-term extreme ice loads prediction and fatigue damage evaluation for an icebreaker. Ships and Offshore Structures, 13.
  4. Det Norske Veritas, 2012 DNV Recommended Practice, Fatigue Design of Offshore Steel Structures, DNV-RP-C203.
  5. Enkvist, E., 1972. On the Ice Resistance Encountered by Ships Operating in the Continuous Mode of Ice Breaking, Report No.24. The Swedish Academy of Engineering Sciences in Finland, Helsinki.
  6. Kim, H. S., Jeong, S., Woo, S. & Han, D., 2018. Study on the procedure to obtain an attainable speed in pack ice. International Journal of Naval Architecture and Ocean Engineering, 10(4), pp.491-498.
  7. Kim, J. & Kim, Y., 2018. Numerical simulation on the response of moored semi-submersible under ice load. Journal of Ocean Engineering and Technology, 32(3), pp.177-183.
  8. Lee, J., Kwon, Y., Rim, C. & Lee, T., 2016. Characteristic analysis of local ice load signals in ice-covered waters. International Journal of Naval Architecture and Ocean Engineering, 8(1), pp. 66-72.
  9. Lloyd's Register, 2014. ShipRight Design and Construction, Fatigue Design Assessment - Application and Notations.
  10. Olkin, I., Gleser, L. & Derman, C., 1980. Probability, models and applications. New York: Macmillan Publishing Co., Inc..
  11. Poznyak, I.I. & Ionov, B.P., 1981. The division of ice breaking resistance into components. In: Proceedings of the Sixth STAR Symposium. SNAME, New York, pp.249-252.
  12. Riska, K., 2010. Ship-ice interaction in ship design: theory and practice, Encyclopedia of Life Support Systems (EOLSS), Developed under the Auspices of the UNESCO, Eolss Publishers, Oxford, UK.
  13. Suyuthi, A., Leira, B. J. & Riska, K., 2013. Fatigue damage of ship hulls due to local ice-induced stresses. Applied Ocean Research, 42, pp.87-104.
  14. Zhang, S., Bridges, R. & Tong, J., 2011. Fatigue design assessment of ship structures induced by ice loading - an introduction to the ShipRight FDA ICE procedure. Proceeding of the Twenty-First International Offshore and Polar Engineering Conference, Maui, Hawaii, pp.1082-1086.