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Mathematical Problems in Engineering
Volume 2013, Article ID 793412, 7 pages
http://dx.doi.org/10.1155/2013/793412
Research Article

Torsion Dynamic Behaviour of the Ship Hull Made out of Layered Composites

“Dunarea de Jos” University of Galati, Domneasca Street, No. 47, 800008 Galati, Romania

Received 23 February 2013; Accepted 6 May 2013

Academic Editor: Irene Penesis

Copyright © 2013 Ionel Chirica. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper addresses the dynamic torsion behaviour of the ship hull with very large open decks. A short overview of the past research is presented, and several key findings and behavioral characteristics are discussed. In the paper, the author is focusing on the dynamic part of a new macroelement model used for torsion dynamic analysis of the ship hull made of composite materials. The numerical analysis (using two methods, one of them being a new proposed method) and experiments are developed on a simplified typical hull of a container ship. The torsion analysis is performed on a scale model of a container ship, made of layered composite plates, and the first 5 natural frequencies are determined. The results obtained with the proposed numerical method (software code TORS, made by the author) are compared with the results obtained with FE analysis and with the experiments done on the physical model.