System Reliability-Based Design using a Single-Loop Method

2007-01-0555

04/16/2007

Event
SAE World Congress & Exhibition
Authors Abstract
Content
An efficient approach for series system reliability-based design optimization (RBDO) is presented. The key idea is to apportion optimally the system reliability among the failure modes by considering the target values of the failure probabilities of the modes as design variables. Critical failure modes that contribute the most to the overall system reliability are identified. This paper proposes a computationally efficient, system RBDO approach using a single-loop method where the searches for the optimum design and for the most probable failure points proceed simultaneously. Specifically, at each iteration the optimizer uses approximated most probable failure points from the previous iteration to search for the optimum. A second-order Ditlevsen upper bound is used for the joint failure probability of failure modes. Also, an easy to implement active strategy set is employed to improve algorithmic stability. The approach is demonstrated on two design examples involving a beam and, an internal combustion engine.
Meta TagsDetails
DOI
https://doi.org/10.4271/2007-01-0555
Pages
13
Citation
Liang, J., Mourelatos, Z., and Nikolaidis, E., "System Reliability-Based Design using a Single-Loop Method," SAE Technical Paper 2007-01-0555, 2007, https://doi.org/10.4271/2007-01-0555.
Additional Details
Publisher
Published
Apr 16, 2007
Product Code
2007-01-0555
Content Type
Technical Paper
Language
English