DEVELOPMENT OF THRESHOLD VALUES FOR A MINIMUM STABILITY CRITERION BASED ON FULL SCALE ACCIDENTS
|Author(s)||S. Kruger, F. Kluwe|
In previous research works an intact stability criterion has been developing aiming at determination of the sufficient intact stability of a vessel in a heavy weather condition. The aim of that criterion was the establishing of the minimum stability level that would ensure that the risk of capsizing that remains is as low as it is reasonably practical. Subject criterion results in the calculation of the index value. To make this criterion applicable from the practice point of view we will need to define the threshold values for this index in order to distinguish between unsafe and safe vessels/conditions and establishing the minimum safety level in heavy weather. To set the threshold value for ISEI, standing for the insufficient stability event index), the authors of this volume have conducted the investigation of several events of the full-scale capsizing together with the numerical computational methods and procedures. Subject procedures and methods are mainly based on the computation of non-linear rolling motions of the vessel. Such methods/procedures have been under development in the course of the last decades with the intention of their authors to conduct the analysis of the full scope events of capsizing for authorities of Germany. The associated computations could be used to determine the required threshold values for the dynamic intact stability criterion...
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