Comparative natural global vibration modes analysis of two gas carrier maritime ships
Keywords:
gas carrier maritime ships, natural global vibration modes, 3D-FEM analysis.
Abstract
This technical paper presents a comparative study of two gas carrier maritime ships, focusing on their natural global vibration characteristics. The selected ships are an LPG carrier with a length of 125.6 m and an LNG carrier with a length of 289.3 m, both of which have fully developed structural models, previously used for strength assessment analysis. For both ships, relevant loading conditions are selected, full cargo and ballast cases. The natural global vibration analysis provides the vertical, horizontal, torsional, and longitudinal eigenmodes, with or without the inclusion of the fluid-structure effect. The results emphasize the sensitivity and the differences in the two ships’ structures on the modal vibration characteristics.
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References
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[2]. Domnisoru, L., “Structural Analysis and Hydroelasticity of Ships”, Publishing House “Dunarea de Jos” University of Galati Foundation, Galati, 2006.
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[2]. Domnisoru, L., “Structural Analysis and Hydroelasticity of Ships”, Publishing House “Dunarea de Jos” University of Galati Foundation, Galati, 2006.
[3]. Domnisoru, L., "On the strength assessment of a small liquid petroleum gas carrier in oblique waves by 1D and 3D-FEM analyses”, IOP Conference Series: Materials Science and Engineering, Vol. 961, Issue 1, 2020.
[4]. Domnisoru, L., “"On the structural valuation in oblique waves of a large liquefied natural gas carrier by 3D-FEM model approach””, International Journal of Modern Manufacturing Technologies, Vol.XV(2), pp.200-219, 2023.
[5]. FEMAP, “Femap/NX Nastran User Guide. Academic License”, Siemens PLM Software, 2025.
[6]. ISSC, “Proceeding of the 22th International Ship and Offshore Structures”, ISSC, Wuxi, 2025.
[7]. Reddy, J.N, "An Introduction to the Finite Element Method. Third Edition”, McGraw Hill Publishing House, New York, 2006.
Published
2025-12-13
How to Cite
1.
Domnișoru L, Păcuraru S. Comparative natural global vibration modes analysis of two gas carrier maritime ships. Annals of ”Dunarea de Jos” University of Galati. Fascicle XI Shipbuilding [Internet]. 13Dec.2025 [cited 15Dec.2025];48:15-2. Available from: https://www.gup.ugal.ro/ugaljournals/index.php/fanship/article/view/9424
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