3511. The Use of Inferential Statistics in Ships’ Stability Analysis

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Paper

MELISSA COOLEY, MICHAEL DIGGS, David Hansch: 3511. The Use of Inferential Statistics in Ships’ Stability Analysis. 2010.

 

Abstract

A deterministic approach is traditionally performed for damage stability analysis on Navy ships, while commercial,
ABS accredited, ships use Safety of Life At Sea (SOLAS) and International Maritime Organization (IMO)
probability studies. SOLAS and IMO analyses provide an attained subdivision index, but do not allow the designer
to determine the actual KG value required to survive damage a certain percentage of the time. In a deterministic
approach one would have to analyze all cases to determine the passing percentage. The use of inferential statistics
will allow one to determine the KG required for a ship to survive damage a certain percentage of time, or the
percentage of cases that will meet the analyzed stability criteria at a particular KG, without having to analyze every
damage case, and provides more detail than an attained subdivision index, as with SOLAS and IMO requirements.

 

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