In this paper, a probabilistic design optimization method based on finite element method is proposed to calculate the variability of design parameters subject to a specified dispersion of natural frequencies of rotating blades. The element stiffness and mass matrices are derived using a two-stage finite element method and numerical integration. Based on the perturbation technology, the sensitivity of the frequencies, as well as relationship between the frequency dispersion and the coefficient of variability (CV) of the design parameters can be obtained. Such sensitivity information is then used to convert the probabilistic design optimization problem into a deterministic optimization problem. Two case studies are given to illustrate the proposed method. From the results, it is concluded that rotation of blade changes the sensitivity of CV to the design parameters considered, and using the proposed method can transform the probabilistic constraints to deterministic constraints.
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ASME 2010 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
August 15–18, 2010
Montreal, Quebec, Canada
Conference Sponsors:
- Design Engineering Division and Computers in Engineering Division
ISBN:
978-0-7918-4409-0
PROCEEDINGS PAPER
Probabilistic Design Optimization of Frequency Dispersion for Rotating Blades
Liqiang An,
Liqiang An
North China Electric Power University, Baoding, China
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G. Gary Wang,
G. Gary Wang
Simon Fraser University, Surrey, BC, Canada
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Zhangqi Wang
Zhangqi Wang
North China Electric Power University, Baoding, China
Search for other works by this author on:
Liqiang An
North China Electric Power University, Baoding, China
G. Gary Wang
Simon Fraser University, Surrey, BC, Canada
Zhangqi Wang
North China Electric Power University, Baoding, China
Paper No:
DETC2010-28172, pp. 963-972; 10 pages
Published Online:
March 8, 2011
Citation
An, L, Wang, GG, & Wang, Z. "Probabilistic Design Optimization of Frequency Dispersion for Rotating Blades." Proceedings of the ASME 2010 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 1: 36th Design Automation Conference, Parts A and B. Montreal, Quebec, Canada. August 15–18, 2010. pp. 963-972. ASME. https://doi.org/10.1115/DETC2010-28172
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