Paper Title: A New Method for Assessing the Safety of Ships Damaged by Grounding
J K Paik, D K Kim, D H Park and H B Kim, Pusan National University, Korea
M S Kim, Lloyd’s Register Asia, Korea
The primary aim of the present study is to propose an innovative method for assessing the safety of ships which have suffered accidental or in-service damages. Only a small number of probable scenarios for accidental or in-service damage representing all possible damage scenarios are selected using a sampling technique in which the random variables affecting the damage are probabilistically characterized. A damage index for the corresponding damage scenario is defined as a function of damage characteristics such as location and extent of the damage. The residual strength performance of a ship with the corresponding damage scenario can then be calculated by analytical or numerical methods. Once this process has been carried out for each of the damage scenarios selected, a diagram relating the residual strength performance to the damage index (abbreviated as the R-D diagram) can be established. This diagram will be very useful for a first-cut assessment of a ship’s safety immediately after it has suffered structural damage. The diagram can also be used to determine acceptance criteria for a ship’s safety against accidental or in-service damage. An applied example is shown to demonstrate the applicability of the proposed method in terms of developing a diagram between the ultimate longitudinal strength versus grounding damage index for four types of double-hull oil tankers VLCC, Suezmax, Aframax, and Panamax
Transactions RINA, Vol 154, Part A1, International Journal Maritime Engineering, Jan-Mar 2012
DOI No: 10.3940/rina.ijme.2012.a1.218
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