Structural optimization procedure of a composite wind turbine blade for reducing both material cost and blade weight
- Title
- Structural optimization procedure of a composite wind turbine blade for reducing both material cost and blade weight
- Author
- 최동훈
- Keywords
- composite materials; evolutionary algorithm; fatigue life prediction; horizontal axis wind turbine blade; structural optimization; ROTOR BLADES; FATIGUE; DESIGN; FAILURE
- Issue Date
- 2013-01
- Publisher
- TAYLOR & FRANCIS LTD
- Citation
- Engineering Optimization, 2013, 45(12), P.1469-1487
- Abstract
- A composite blade structure for a 2 MW horizontal axis wind turbine is optimally designed. Design requirements are simultaneously minimizing material cost and blade weight while satisfying the constraints on stress ratio, tip deflection, fatigue life and laminate layup requirements. The stress ratio and tip deflection under extreme gust loads and the fatigue life under a stochastic normal wind load are evaluated. A blade element wind load model is proposed to explain the wind pressure difference due to blade height change during rotor rotation. For fatigue life evaluation, the stress result of an implicit nonlinear dynamic analysis under a time-varying fluctuating wind is converted to the histograms of mean and amplitude of maximum stress ratio using the rainflow counting algorithm Miner's rule is employed to predict the fatigue life. After integrating and automating the whole analysis procedure an evolutionary algorithm is used to solve the discrete optimization problem.
- URI
- http://www.tandfonline.com/doi/abs/10.1080/0305215X.2012.743533http://hdl.handle.net/20.500.11754/41456
- ISSN
- 0305-215X
- DOI
- 10.1080/0305215X.2012.743533
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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