Comparative reliability analysis of ships under vector-load processes |
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| Authors: | Huirong Jia Torgeir Moan |
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| Affiliation: | (1) Centre for Ships and Ocean Structures, Norwegian University of Science and Technology, Otto Nielsens v 10, 7491 Trondheim, Norway;(2) Department of Marine Technology/Centre for Ships and Ocean Structures, Norwegian University of Science and Technology, Otto Nielsens v 10, 7491 Trondheim, Norway |
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| Abstract: | This paper deals with reliability analysis of ships under vector-load processes. Failure is expressed by multiple response variables. Different methods can be used to assess failure probability, primary among them are the time-independent and out-crossing (up-crossing) rate methods. This paper describes the procedure for performing reliability analysis of ships under vector-load processes by the out-crossing rate method. Alternative methods based on piecewise linear or continuous modeling of failure surface are explored for calculating the out-crossing rate and compared. The methods are exemplified by calculating the conditional probability of a damaged double hull oil tanker under combined vertical and horizontal bending moments. |
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