Analytical validation of hull structural numerical analysis for ship hull structural monitoring

The current paper presents a comprehensive analysis of ship hull structures through both analytical and numerical methods, focusing on critical loading scenarios such as bending moments, shear forces, and torsional moments. The analytical approach employs section modulus calculations, simple beam theory, and the Smith method to derive stress and strain distributions at each transverse cross-section of the offshore support vessel. Concurrently, a numerical analysis using LS-Dyna discretizes the vessel model into finite elements with a mesh size of 0.04 m, enabling detailed evaluation of structural responses along the ship length. Comparative results demonstrate strong agreement between analytical and numerical findings, validating the accuracy of the numerical approach. This research underscores the effectiveness of LS-Dyna simulations in predicting stress and strain distributions under various loading conditions. Moreover, it introduces a combined refined analytical validation method, enhancing the reliability of numerical analyses within the elastic limit, marking a significant advancement in SHM field.