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Title: Reliability-Based design optimization method of turbine disk with transformed deterministic constraints
Authors: Hu, DY
Yang, JJ
Fei, CW
Wang, RQ
Choy, YS 
Keywords: Turbine disk
Reliability-based design optimization
Mean value-based single-loop-single-vector
Limit-state factor
Reliability analysis
Issue Date: 2017
Publisher: American Society of Civil Engineers
Source: Journal of aerospace engineering, Jan. 2017, v. 30, no. 1 How to cite?
Journal: Journal of aerospace engineering 
Abstract: To improve the computational efficiency of the reliability-based design optimization (RBDO) of a complex structure with nonlinear and implicit limit-state function, the single-loop-single-vector (SLSV)-limit-state factor (LSF) (SLSV-LSF) method was developed by fully considering the advantages of the SLSV approach and the LSF method to transform uncertain constraints into deterministic constraints. The mathematical models of SLSV and LSF were established and the basic RBDO process of the SLSV-LSF method is presented. The shape optimization of an aeroengine turbine disk was completed based on the proposed method. From the reliability sensitivity analysis of the turbine disk, it is revealed that an uncertain constraint of average circumferential stress can be transformed into a deterministic constraint and material density can be regarded as a deterministic variable. Through the min-mass shape design of the turbine disk based on different approaches, it is demonstrated that the developed method maintains high computational speed and efficiency while keeping maintaining computational accuracy, which validates the feasibility and validity of the SLSV-LSF method in the RBDO of aeroengine typical components.
ISSN: 0893-1321
EISSN: 1943-5525
DOI: 10.1061/(ASCE)AS.1943-5525.0000671
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