EFFECT OF FLUID IN SHIPS TANKS ON THE BEHAVIOUR OF DOUBLE HULL VLCCS IN COLLISION
Fluid (liquid cargo) in cargo tanks may have an important effect on deformation configuration and failure of the inner side plating of ship in collision and grounding. The paper reports the results of a numerical study carried out to investigate the effect of fluid in ships tanks. A structural member of a tank side structure consisting of one typical side longitudinal of a VLCC is considered together with the inner side plating adjacent to it (one longitudinal spacing, one half above and one half below the considered longitudinal). The span is taken as the distance between two successive web frames. This structure is modeled with finite shell elements. A volume of fluid representing liquid cargo adjacent to the member is modelled in a Euler mesh. Forced motion representing collision at the middle of the member is imposed. Comparisons of the behaviour of the member in the absence of and in the presence of the fluid are carried out. The study shows that when the fluid inside a tank has enough space to move, such as in a partially filled tank, its effect on absorbed energy is small. However in a full tank, where only a small space is available for the fluid to move, normally about 2% of the tank volume, energy absorption capacity of the side structure may be drastically reduced.
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Supplemental Notes:
- J Soc Naval Arch Japan, v 177, June 1995, p 365 [5 p, 7 ref, 9 fig]
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Authors:
- Kim, J Y
- Lee, K J
- Publication Date: 1995
Language
- English
Subject/Index Terms
- TRT Terms: Fluids; Numerical analysis; Very large crude carriers; Water transportation crashes
- Old TRIS Terms: Double hulls
- Subject Areas: Marine Transportation; Materials; Safety and Human Factors;
Filing Info
- Accession Number: 00717764
- Record Type: Publication
- Source Agency: British Maritime Technology
- Files: TRIS
- Created Date: Mar 4 1996 12:00AM