Dynamic stability criteria based on the simulation of full scale accidents

Volume
1
Start Page
396
End Page
403
Citation
10th International Symposium on Practical Design of Ships and other Floating Structures, PRADS 2007. - Vol. 1. - Seite 396-403
Contribution to Conference
10th International Symposium on Practical Design of Ships and other Floating Structures, PRADS 2007 
Scopus ID
2-s2.0-84886646406
Publisher
ABS
ISBN
0-943870-04-6
978-0-943870-04-5
It has become obvious that modern ships suffer from problems related to their seakeeping-behavior, which is mainly related to large amplitude roll motion in head and following seas. As these effects are not covered by the existing intact stability criteria, an additional concept was developed. This new concept allows us to quantify the risk of the occurrence of large roll angles by calculating a capsizing index. The question left open so far was, how much stability would be required for a certain ship to meet a distinct safety level against capsizing. This paper presents an approach addressing this question based on the analysis of some real capsizing accidents analyzed by applying various criteria proposed in the past, in comparison to the new intact stability index. For this purpose our simulation code, ROLLS, was applied, taking into account relevant effects such as cargo shift, additional heeling moments and water ingress.
Schlagworte
Capsizing
Intact stability
Parametric rolling
Probability
Seakeeping performance
Ship safety
Stability criteria
DDC Class
620: Engineering