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

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)
Publication Information
Journal of the Society of Naval Architects of Korea / v.56, no.3, 2019 , pp. 231-241 More about this Journal
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.
Fatigue damage estimation; Ice-going vessel; Broken ice fields; Simplified analysis method; Ice-structure interaction;
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Times Cited By KSCI : 2  (Citation Analysis)
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