SOME CONSIDERATIONS ON THE PROBABILITY DISTRIBUTIONS FOR THE DAMAGE LENGTH AND DAMAGE PENETRATION BASED ON A RE-ANALYSIS OF RECORDED SHIP COLLISIONS DATA

Article type: Research Article

Authors: Bulian, Gabriele | Francescutto, Alberto

Affiliations: Department of Naval Architecture, Ocean and Environmental Engineering, University of Trieste, Italy

Abstract: A re-analysis of the Collision Database used in the development of harmonised subdivision and damage stability rules recently proposed by SLF47 has been undertaken, aimed at clarifying the grey area identified in the zone of large ships and in particular the large passenger cruise vessels. The results of the analysis confirm indeed the validity of HARDER for ships up to a medium size, say 175 m, above which some ship typology appears heavily penalised. It appears that, also in view of the characteristic ratio between the main ship dimensions, maintaining present nondimensional probability density functions for the damage length and penetration up to that length and then taking the parameters of the pdf as constant in dimensional form for larger vessels could remove the problem without modifying the general structure of the probabilistic harmonised approach.

Journal: International Shipbuilding Progress, vol. 52, no. 4, pp. 325-356, 2005