Ship grounding on rock—II. Validation and application

• Published in: Marine structures 1997-08, Vol.10 (7), p.563-584
• Main Author: Simonsen, Bo Cerup
• Format: Article
• Language: English
• Subjects: Applied sciences; bottom raking; collision; crashworthiness; Exact sciences and technology; formal risk assessment; Ground, air and sea transportation, marine construction; impact; internal mechanics; Marine construction; oil outflow; probabilistic damage assessment; ship grounding; tearing
• ISSN: 0951-8339; 1873-4170
• DOI: 10.1016/S0951-8339(98)00003-3

The primary purpose of this paper is to show examples of verification and application of the theory presented in B.C. Simonsen (Ship grounding on rock—I. Theory, Marine Structures 10 (1997) 519–562). Analysis of four largescale tests performed by the Naval Surface Warfare Centre (NSWC), USA, shows that the theory can predict the energy absorption of the four different ship bottoms with errors less than 10%. The rock penetration to fracture is predicted with errors of 10–15%. The sensitivity to uncertain input parameters is discussed. Analysis of an accidental grounding that was recorded in 1975 also shows that the theoretical model can reproduce the observed damage. Finally, it is demonstrated that the proposed methodology is sufficiently fast to be used in a probabilistic framework. Based on a set of stochastic input parameters, the probability density functions for the damage extents of a single hull VLCC were derived from simulations. Possible future applications of the methodology are discussed.