Common reliability models rely usually on simple assumptions as to manage constant failure rates especially when electronic components are treated in the reliability block diagram. Nevertheless, more realistic modeling imply to deal with Weibull based hazard functions or even with more complex models. For oil and gas plants, and repairable systems in general, actually, it may happen to deal with nonlinear behavior of the failure intensity function. Multiple slope changes may occur due to long observation time and to restoration activities affecting the overall system performance and failure rate shape over time. Commissioning phase is of particular interest for electro-mechanical complex systems because, depending on the plant extension and design, it can influence the hazard function shape and therefore its model. In this paper the authors will try to show how experimental failure rate information can be modeled by means of different hazard functions.
|Titolo:||Modelling of Non-Monotonic hazard function for the early production life of oil and gas plants|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|