PSI - Issue 47

Muhammad Imaduddin Hanif et al. / Procedia Structural Integrity 47 (2023) 125–132 Hanif et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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based on a predetermined constant value below one. This is inversely proportional to the light model where the two variations have a ratio of more than one. This shows how determining the 300% imperfection value for a slenderness plate value of more than 60 influences the ultimate strength value later. 4. Conclusions In this study, a comparison is made between the analysis using the FEM method under variation of geometric imperfection and the IACS-CSR method to determine the ultimate strength value of a stiffened panel. The analysis of the FEM method itself is carried out using the ANSYS. In the analysis of the two methods, variations are given in the form of the geometry of the stiffened panels which are based on the inertia of area values of each stiffened panel and the span/bay ratio. Thus, several models of stiffened panels will be composed but have the same inertia of area value for each model. For the analysis of the FEM method, additional variations are given in the form of initial imperfection geometric with variations of 2.5%, 25%, 100%, and 300%. For the results of the ultimate strength value, all stiffened panel models with initial imperfection geometric variations of 2.5% and 25% will have an ultimate strength value greater than the ultimate strength value obtained from the IACS-CSR method. However, different things occur in models with initial imperfection geometric variations of 100% and 300%, where the ultimate strength value is smaller than the ultimate strength value based on the IACS-CSR method. References Adiputra, R., Yoshikawa, T., Erwandi, E., 2023. Reliability-Based Assessment of Ship Hull Girder Ultimate Strength. Curved and Layered Structures, 10, 20220189. Ansori, D.T.A., Prabowo, A.R., Muttaqie, T., Muhayat, N., Laksono, F.B., Tjahjana, D.D.D.P., Prasetyo, A., Kuswardi, Y., 2022. 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