Efficient approaches for system reliability-based design optimization

2008 ◽  
pp. 87-113
Author(s):  
Efstratios Nikolaidis
Keyword(s):  
Design Optimization ◽  
System Reliability ◽  
Reliability Based Design Optimization ◽  
Reliability Based Design

scholarly journals System Reliability Based Design Optimization of Truss Structures with Interval Variables

2019 ◽  
Author(s):  
Mohammad Zaeimi ◽  
Ali Ghoddosain
Keyword(s):  
Design Optimization ◽  
System Reliability ◽  
Truss Structures ◽  
Equivalent Model ◽  
Reliability Based Design Optimization ◽  
Uncertain Variables ◽  
Reliability Based Design ◽  
Interval Variables ◽  
Reliability Method ◽  
Process Reliability

New products ranging from simple components to complex structures should be designed to be optimal and reliable. In this paper, for the first time, a hybrid uncertain model is applied to system reliability based design optimization (RBDO) of trusses. All uncertain variables are described by random distributions but those lack information are defined by variation intervals. For system RBDO of trusses, the first order reliability method, as well as an equivalent model and the branch and bound method, are utilized to determine the system failure probability; and Improved (μ + λ) constrained differential evolution (ICDE) is employed for the optimization process. Reliability assessment of some engineering examples is proposed to verify our results. Moreover, the effect interval variables on the optimum weight of the truss structures are investigated. The results indicate that the optimal weight depends not only on the uncertainty level but also on the equivalent standard deviation; and a falling-rising behavior is observed.

Sign in / Sign up

Export Citation Format

Share Document