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http://dx.doi.org/10.7837/kosomes.2022.28.4.667

A Study on ULCS Fatigue Damage Considering the Variation of Cargo Weight Distribution  

Yi, Minah (Division of Navigation Science, Korea Maritime & Ocean University)
Choi, Shin-pyo (Division of Navigation Science, Korea Maritime & Ocean University)
Park, Jun-bum (Division of Navigation Science, Korea Maritime & Ocean University)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.28, no.4, 2022 , pp. 667-679 More about this Journal
Abstract
Fatigue damage analysis of ships includes parameters considering operational factors. Due to these operational variables, there is a difference between the fatigue damage estimated during the design stage and the actual accumulated fatigue damage. Likewise, there are various loading conditions for the real container ships, but at design stage the fatigue damage is calculated by applying the representative loading conditions. Moreover, although the difference in fatigue damages is expected when the actual and design loading conditions are applied, there are few studies on the contributions of the fatigue damage based on the loading conditions of container ships. In this paper, fatigue contributions were investigated from various cargo weight distributions. The hull girder loads calculated through seakeeping analysis and fatigue damages obtained by performing spectral fatigue analysis were identified under new loading conditions. As a result, it was found that the variation of cargo weight distribution in the container ship brought about changes in the hull girder loads and fatigue damage by affecting the hull girder stress.
Keywords
Spectral fatigue analysis; ULCS; Loading condition; Cargo weight distribution; Hull girder load; Stress RAO;
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