The fatigue life assessment of structural parts of a ship or an offshore using finite element analysis has been important in order to meet the various design rules and requirements of the classification societies and ship owners. To estimate the stress concentration in the local feature, it is required to model the target structural part in detail and to generate a fine mesh the size of a part thickness. When creating the fatigue analysis model, the detailed geometry of a target structural part is defined by a coarse mesh and then a local fine mesh is modeled based on the coarse mesh and the detailed target geometry. Due to the complexity of the detailed geometry of target structural parts, most of the fatigue analysis models are modeled manually at present. In general, the typical type of structural parts needed to be analyzed is limited for each shipyard. Thus, this paper introduces an automatic generation method of the fatigue analysis model for typical structural parts. The typical structural parts are modeled via the parametric modeling technique, so various types and sizes of structural parts are modeled automatically. A local fine mesh is generated according to the feature of geometry and the location of a hot spot. The introduced method is implemented and tested in the field. To reflect the field knowledge, know-how of the analysis experts are captured and incorporated in the implemented system. It turns out that the time required for fatigue analysis modeling decreases about 50% for each typical structural part using the system.
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