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Publications
Xu, M.C., Teixeira, A.P. and Guedes Soares, C. (2024), IACS-CSR buckling strength requirement-based response surface approach for reliability assessment of stiffened panels, Ocean Engineering, Vol. 302, 117299.
A reliability assessment formulation for stiffened panels using the Model Correction Factor Method (MCFM) is derived from semi-empirical design equations of the IACS Common Structural Rules (CSR) for double-hull oil tankers. The approach consists of using the IACS-CSR buckling strength requirements of stiffened panels as a simplified response model that is calibrated iteratively at the design points calculated by the first-order reliability method by means of the results of non-linear finite element analysis of the stiffened panel. The approach is applied to a deck stiffened panel of a Suezmax oil tanker, designed according to the CSR for Double Hull Oil Tankers that has been used in the development of codes for the structural design of ships. The stiffened panels are subjected to uniaxial compressive loads induced by the hull girder vertical bending moment in a typical seagoing operational condition of the oil tanker in full load. It is shown that the application of the MCFM leads to a fast convergence towards the design point since the IACS-CSR formulation can capture the correct failure mode of the stiffened panels and the important mechanical features related to the prediction of their ultimate strength providing a convenient response surface model for reliability assessment.
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