Intelligent Approach to Robust Design Optimization of a Rotor System due to Its Support Stiffness Uncertainty
Joint Authors
Xu, Bensheng
Zang, Chaoping
Zhang, Genbei
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-02-11
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
In this paper, an intelligent robust design approach combined with different techniques such as polynomial chaos expansion (PCE), radial basis function (RBF) neural network, and evolutionary algorithms is presented with a focus on the optimization of the dynamic response of a rotor system considering support stiffness uncertainty.
In the proposed method, the PCE method instead of the traditional Monte Carlo uncertainty analysis is applied to analyze the uncertain propagation of system performance.
The RBF network is introduced to establish the approximate models of the objective and constraint functions.
Taking the low-pressure rotor of a gas turbine with support stiffness uncertainty as an example, the optimization model is established with the mean and variance of unbalanced response of the rotor system at different operating speeds as the objective function, and the maximum unbalance response is less than the upper limit as the constraint function.
The polynomial chaos expansion is generated to facilitate a rapid analysis of robustness in the presence of support stiffness uncertainties that is defined in terms of tolerance with good accuracy.
The optimal Hypercubus are used as experimental plans for building RBF approximation models of the objective and constraint functions.
Finally, the robust solutions are obtained with the multiobject optimization algorithm NSGA-II.
Monte Caro simulation analysis demonstrates that the qualified rate of maximum vibration responses of the low-pressure rotor system can be increased from 83.6% to over 99%.
This approach to robust design optimization is shown to lead to designs that significantly decrease vibration responses of the rotor system and improved system performance with reduced sensitivity to support stiffness uncertainty.
American Psychological Association (APA)
Xu, Bensheng& Zang, Chaoping& Zhang, Genbei. 2020. Intelligent Approach to Robust Design Optimization of a Rotor System due to Its Support Stiffness Uncertainty. Shock and Vibration،Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1209723
Modern Language Association (MLA)
Xu, Bensheng…[et al.]. Intelligent Approach to Robust Design Optimization of a Rotor System due to Its Support Stiffness Uncertainty. Shock and Vibration No. 2020 (2020), pp.1-11.
https://search.emarefa.net/detail/BIM-1209723
American Medical Association (AMA)
Xu, Bensheng& Zang, Chaoping& Zhang, Genbei. Intelligent Approach to Robust Design Optimization of a Rotor System due to Its Support Stiffness Uncertainty. Shock and Vibration. 2020. Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1209723
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1209723