Journal
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
Volume 12, Issue 4, Pages 377-392Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/1475921713495082
Keywords
Ship; reliability; redundancy; structural health monitoring; Bayesian updating; polar representation
Funding
- US Office of Naval Research [N-00014-08-1-0188, N-00014-12-1-0023, 331]
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This article presents an approach for improving the accuracy in the reliability and redundancy assessment of ship cross-sections by using the Bayesian updating method. The vertical bending moments associated with ultimate failure and first failure for a given ship cross-section are evaluated using an optimization-based method and the progressive collapse method, respectively. The prior information on the wave-induced load effects is calculated based on the linear theory. Having extracted the hogging and sagging peaks from the low-frequency structural health monitoring signals, the Bayesian method is used to update the Rayleigh-distributed prior load effects. The original and updated reliability and redundancy indexes of the ship cross-sections are evaluated, and the results are displayed in polar plots.
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