On 3D-FEM analysis of a 9000 tdw tanker global eigen vibration modes
Identifying a vessel global eigen vibration modes during the early stages of the design process is necessary, as it allows the prediction of special phenomena such as springing, whipping or other different resonance condition, that can lead to an uncomfortable working environment or, in extreme cases, even damage to the structure or equipment. An advanced approach for assessing the ships’ eigen vibration characteristics is based on the 3D-FEM method. This research is focused on analysing the eigen global vibration frequencies, for vertical, horizontal, and torsion modes, of a 9000 tdw tanker, pointing out the influence of the surrounding water by hydrodynamic added masses formulation.
. JSEA, “Marine engineering in Japan”, Japan Ship Exporters' Association, 1993-2019, https://www.jsea.or.jp
. DNV-GL,“Poseidon program users’ manual”, Det Norske Vertias and Germanischer Lloyd, 2019.
. DNV-GL, “Hull structure rules“, Det Norske Vertias and Germanischer Lloyd, 2019, https://www.dnvgl.com
. Domnisoru, L., “Structural analysis and hydroelasticity of ships”, The University Foundation ”Dunarea de Jos” Publishing House, Galati, 2006.
. Domnisoru, L., “Special chapters on ships’ structure analysis. Applications”, The University Foundation ”Dunarea de Jos” Publishing House, Galati, 2017.
. Dumitru, D.,“Compendium of ships forms”, “Dunarea de Jos” University Foundation Publishing House, Galati, 2014.