Fatigue Life Prediction of Vessel Engine Frame Box by Utilizing Finite Element Analysis

유한요소해석을 활용한 선박용 엔진 프레임 박스의 피로수명의 예측

This paper presents the numerical estimation of the fatigue life for the welded parts of the engine frame box of the S60MC-C vessel engine. The time-variations of the effective stresses at the critical points during a piston cycle are computed through the finite element analysis, by applying the dynamic loadings that were analytically derived by the kinematic analysis. The fatigue life of the welded parts is estimated by making use of the hot-spot stress extrapolation and the Palmgrem-Minor cumulative damage rule.