Safety Evaluation of the Time-variant Structure Under Epistemic Uncertainty

The time-variant fuzzy failure possibility (TVFFP) is first defined to evaluate the safety level of the time-variant structure under fuzzy input and fuzzy state. Then, the relation between the TVFFP and the time-variant failure possibility (TVFP) is derived. After that, the estimation of TVFFP is converted to that of a series of TVFPs via leveraging the Gaussian quadrature, on which the adaptive Kriging combined with fuzzy simulation method is proposed to efficiently estimate the TVFFP. The presented example demonstrates the effectiveness of the proposed method.