Reliability based robust design optimization based on sensitivity and elasticity factors analysis

Karar, Naoual; Felkaoui, Ahmed; Djeddou, Farhat

Journal of Materials and Engineering Structures
Volume 7, Numéro 1, Pages 97-111
2020-03-30

Reliability Based Robust Design Optimization Based On Sensitivity And Elasticity Factors Analysis

Authors : Karar Naoual . Felkaoui Ahmed . Djeddou Farhat .

Abstract

In this paper, a Reliability Based Robust Design Optimization (RBRDO) based on sensitivity and elasticity factors analysis is presented. In the first step, a reliability assessment is performed using the First-and Second Order Reliability Method (FORM)/ (SORM), and Monte Carlo Simulation. Furthermore, FORM method is used for reliability elasticity factors assessment, which can be carried out to determine the most influential parameters, these factors can be help to reduce the size of design variables vector in RBRDO process. The main objective of the RBRDO is to improve both reliability and design of a cylindrical gear pair under uncertainties. This approach is achieved by integration of two objectives which minimize the variance and mean values of performance function. To solve this problem a decoupled approach of Sequential Optimization and Reliability Assessment (SORA) method is implemented. The results obtained shown that a desired reliability with a robust design is progressively achieved.