Sample regeneration algorithm for structural failure probability function estimation

authored by: Xiukai Yuan, Shanglong Wang, Marcos A. Valdebenito, Matthias G.R. Faes, Michael Beer
Abstract: An efficient strategy to approximate the failure probability function in structural reliability problems is proposed. The failure probability function (FPF) is defined as the failure probability of the structure expressed as a function of the design parameters, which in this study are considered to be distribution parameters of random variables representing uncertain model quantities. The task of determining the FPF is commonly numerically demanding since repeated reliability analyses are required. The proposed strategy is based on the concept of augmented reliability analysis, which only requires a single run of a simulation-based reliability method. This paper introduces a new sample regeneration algorithm that allows to generate the required failure samples of design parameters without any additional evaluation of the structural response. In this way, efficiency is further improved while ensuring high accuracy in the estimation of the FPF. To illustrate the efficiency and effectiveness of the method, case studies involving a turbine disk and an aircraft inner flap are included in this study.
Organisation(s): Institute for Risk and Reliability
External Organisation(s): Xiamen University
TU Dortmund University
University of Liverpool
Tongji University
Type: Article
Journal: Probabilistic Engineering Mechanics
Volume: 71
ISSN: 0266-8920
Publication date: 01.2023
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Statistical and Nonlinear Physics, Civil and Structural Engineering, Nuclear Energy and Engineering, Condensed Matter Physics, Aerospace Engineering, Ocean Engineering, Mechanical Engineering
Electronic version(s): https://doi.org/10.1016/j.probengmech.2022.103387 (Access: Closed)