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A new method for assessing the safety of ships damaged by collisions

Youssef, SAM; Noh, SH; Paik, J; (2017) A new method for assessing the safety of ships damaged by collisions. Ships and Offshore Structures , 12 (6) pp. 862-872. 10.1080/17445302.2017.1285679. Green open access

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Abstract

The longitudinal strength of a ship decreases with the reduction in its bending moment capacity following a collision accident. This decrease may lead to the total loss of the ship in some cases due to its loss of hull girder strength, particularly when large vessels are involved. Therefore, the damaged ship should be able to reach the closest harbour safely without any catastrophic hull girder collapse. This paper aims to develop a method to predict the hull girder residual strength of double-hull oil tankers by considering probabilistic collision damage scenarios. The collision damage index is defined as the reduction ratio of the vertical hull girder moment of inertia, and the residual strength index is characterised as the reduction ratio of the hull girder ultimate bending moment. Four different as-built double-hull oil tankers (Panamax, Aframax, Suezmax and VLCC) were studied to demonstrate the proposed method and to formulate the collision damage index. The relationships between the residual strength index and the collision damage index are identified in the form of diagrams and linear-type regressions. The produced diagrams and regressions represent a first-cut assessment of a ship’s safety immediately after taking collision damage.

Type: Article
Title: A new method for assessing the safety of ships damaged by collisions
Open access status: An open access version is available from UCL Discovery
DOI: 10.1080/17445302.2017.1285679
Publisher version: http://dx.doi.org/10.1080/17445302.2017.1285679
Language: English
Additional information: This is an Accepted Manuscript of an article published by Taylor & Francis in the Ships and Offshore Structures on 08 February 2017, available online: http://www.tandfonline.com/10.1080/17445302.2017.1285679
Keywords: Double hull oil tankers, probabilistic collision damages, intelligent supersize finite element method, residual longitudinal strength, collision damage index.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/1544233
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