불규칙파 중에서 선박구조 유탄성과 피로 추산에 관한 연구

Abstract

This paper introduces an analysis of ship hydroelasticity for a fatigue assessment of ship structural design. In this study, the hydroelastic analysis for springing and whipping is carried out by using a fully coupled three-dimensional BEM-FEM approach with two-dimensional slamming theoreis, and a sequential fatigue assessment is performed. The fatigue damage is decomposed to wave frequency and high frequency components. Furthermore, the high frequency component is again decomposed to 1st harmonic springing, super harmonic springing and whipping contributions. This decomposition is achieved using a modal superposition principle. Amount of the contributions are compared in irregular sea states.FEM approach with two-dimensional slamming theoreis, and a sequential fatigue assessment is performed. The fatigue damage is decomposed to wave frequency and high frequency components. Furthermore, the high frequency component is again decomposed to 1st harmonic springing, super harmonic springing and whipping contributions. This decomposition is achieved using a modal superposition principle. Amount of the contributions are compared in irregular sea states.