Advanced solution strategies for time-dependent reliability based design optimization

2020 ◽  
Vol 364 ◽  
pp. 112916 ◽  
Author(s):  
Yan Shi ◽  
Zhenzhou Lu ◽  
Zhiliang Huang ◽  
Liyang Xu ◽  
Ruyang He
Keyword(s):  
Design Optimization ◽  
Time Dependent ◽  
Reliability Based Design Optimization ◽  
Solution Strategies ◽  
Reliability Based Design

scholarly journals Time-Dependent Reliability-Based Design Optimization Utilizing Nonintrusive Polynomial Chaos

2013 ◽  
Vol 2013 ◽  
pp. 1-16 ◽  
Author(s):  
Yao Wang ◽  
Shengkui Zeng ◽  
Jianbin Guo
Keyword(s):  
Design Optimization ◽  
Structural Reliability ◽  
Polynomial Chaos ◽  
Time Dependent ◽  
Fe Model ◽  
Reliability Based Design Optimization ◽  
Wear Process ◽  
Reliability Based Design ◽  
Optimization Methodology ◽  
Wear Law

Time-dependent reliability-based design optimization (RBDO) has been acknowledged as an advance optimization methodology since it accounts for time-varying stochastic nature of systems. This paper proposes a time-dependent RBDO method considering both of the time-dependent kinematic reliability and the time-dependent structural reliability as constrains. Polynomial chaos combined with the moving least squares (PCMLS) is presented as a nonintrusive time-dependent surrogate model to conduct uncertainty quantification. Wear is considered to be a critical failure that deteriorates the kinematic reliability and the structural reliability through the changing kinematics. According to Archard’s wear law, a multidiscipline reliability model including the kinematics model and the structural finite element (FE) model is constructed to generate the stochastic processes of system responses. These disciplines are closely coupled and uncertainty impacts are cross-propagated to account for the correlationship between the wear process and loads. The new method is applied to an airborne retractable mechanism. The optimization goal is to minimize the mean and the variance of the total weight under both of the time-dependent and the time-independent reliability constraints.

Time-Dependent Concurrent Reliability-Based Design Optimization Integrating the Time-Variant B-Distance Index

2019 ◽  
Vol 141 (9) ◽  
Author(s):  
Zhonglai Wang ◽  
Zhihua Wang ◽  
Shui Yu ◽  
Xiaowen Cheng
Keyword(s):  
Experimental Data ◽  
Design Optimization ◽  
Confidence Level ◽  
Moment Method ◽  
Extreme Values ◽  
Time Dependent ◽  
Reliability Based Design Optimization ◽  
Reliability Based Design ◽  
Speed Up ◽  
High Computational Efficiency

This paper presents a time-dependent concurrent reliability-based design optimization (TDC-RBDO) method integrating the time-variant B-distance index to improve the confidence level of design results with a small amount of experimental data. The time-variant B-distance index is first constructed using the extreme values of responses. The Hist Loop CDF (HLCDF) algorithm is then presented to calculate the time-variant B-distance index with high computational efficiency. The TDC-RBDO framework is provided by integrating the time-variant B-distance index and time-dependent reliability. The extreme value moment method (EVMM) is implemented to speed up the procedure of the TDC-RBDO. The case of a harmonic reducer is employed to elaborate on the proposed method.

Sign in / Sign up

Export Citation Format

Share Document