Survival signature-based sensitivity analysis of systems with epistemic uncertainties

Feng, G. and Patelli, E. and Beer, M.; Zio, Enrico and Podofillini, Luca and Kröger, Wolfgang and Sudret, Bruno and Stojadinović, Božidar, eds. (2015) Survival signature-based sensitivity analysis of systems with epistemic uncertainties. In: Safety and Reliability of Complex Engineered Systems - Proceedings of the 25th European Safety and Reliability Conference, ESREL 2015. Safety and Reliability of Complex Engineered Systems - Proceedings of the 25th European Safety and Reliability Conference, ESREL 2015 . CRC Press/Balkema, SWZ, pp. 1547-1552. ISBN 9781138028791

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    Abstract

    The survival signature provides a basis for efficient reliability assessment of systems with more than one component type. Often a perfect probabilistic modelling of the system is not possible due to limited information, vagueness and imprecision. Hence generalized probabilistic methods need to be used. These methods allow to explicitly model the uncertainties without the need of unjustified hypotheses and approximation. In this paper, a novel and efficient sensitivity approach is presented. The proposed approach is based on survival signature, allowing to identify and rank components in a system. A numerical example is used to illustrate the above methods.