engleski

Fatigue analysis of HHI SkyBench™ 19000 TEU ultra large container ship with springing effect included

The importance of analyzing hydroelastic vibratory responses (springing and whipping) of ship hull structure and their effects on structural fatigue damage is increasing in line with building of larger and consequently more flexible ships. On the other hand, reliable structural design of such ships cannot be achieved by applying only rule based formulae, and therefore direct calculation approach is required. This is particularly emphasized in case of ultra large container ships (ULCS). In this paper, preliminary results of hydroelastic analysis of a newly designed HHI SkyBenchTM container ship, related to the fatigue assessment of several structural details, are presented. The analysis was performed by general hydro-structure tool HOMER, where 3D FEM model for the structure and 3D potential flow code for fluid modelling, respectively, is used. An outline of the numerical procedure based on the modal approach is given and features of new HHI SkyBenchTM container ship design are described. The result section includes fatigue life assessment of selected finemesh structural details with springing effect included, obtained by the top-down approach.

hydroelasticity; springing; potential flow; finite element method; SkyBenchTM container ship

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