Hull structural response prediction using distortion base modes

Paper in proceeding, 2021

The hull structure health monitoring system is attracting attention by many ongoing vessels to prevent possible failure of the hull structure. As one of these efficient monitoring methods, the conversion method based on the mode superposition assumption had been introduced (Baudin et al., 2013, Bigot et al., 2015). It has the advantage that once the modal amplitudes are determined, it enables to estimate lots of structural behavior such as hull girder loads or stresses of structural members in a simply way. In this research, a case study of applying the conversion method on floating production storage and offloading unit (FPSO) hull model is introduced. Furthermore, the empirical processes in the mode selection stage have been optimized with respect to the target performance accuracy. The validity of this modification is verified by several case studies.