An approach for time-dependent reliability analysis of Jackup structures

This paper proposes an approach for evaluation of time dependent reliability of Jackup structures. An approach for signal processing using prolate spheroidal wave functions is combined with stochastic field representation method to represent ocean waves with least number of independent sources of un...

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Published inCogent engineering Vol. 4; no. 1; p. 1409932
Main Authors Idris, Ahmad, Harahap, Indra Sati Hamonangan, Ali, Montasir Osman Ahmed
Format Journal Article
LanguageEnglish
Published Abingdon Cogent 01.01.2017
Taylor & Francis Ltd
Taylor & Francis Group
Subjects
offshore structures
Reliability analysis
Reliability engineering
Signal processing
Statistical analysis
Structural reliability
Time dependence
time dependent probability
Wave functions
Wave propagation
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Summary:This paper proposes an approach for evaluation of time dependent reliability of Jackup structures. An approach for signal processing using prolate spheroidal wave functions is combined with stochastic field representation method to represent ocean waves with least number of independent sources of uncertainty. First passage probability for dynamical systems subject to stochastic loading was then used in the formulation of the reliability approach. A simplified Jackup was modelled and used to demonstrate the time dependent reliability approach by propagating the uncertain wave load on the unit. In-house computer codes were developed for the analysis of the stochastic response in time-domain to obtain time dependent failure probabilities. The results were compared with those of a similar model in which the statistical method is used.
Bibliography:ObjectType-Article-1
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ISSN:2331-1916
2331-1916
DOI:10.1080/23311916.2017.1409932