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Application of Load Carrying Sandwich Elements in Large Wind Turbine Blades

Jensen, Jacob Fisker / Schultz, Jacob Pagh / Berggreen, Christian / Branner, Kim

Abstract The present work investigates the possibilities and drawbacks when applying sandwich as opposed to single skin composites in the flanges of the load carrying spar in a future 180 m wind turbine rotor. FEA is applied to investigate two basic designs with single skin and sandwich flanges respectively. For a single skin design, buckling is critical compared to other design criterions. By introducing sandwich, a significant weight reduction and increased buckling capacity is obtained. Tower clearance now becomes critical. Proper choice of core material and thickness is important to prevent face wrinkling and large tip deflection. Geometric non-linear analysis showed sensitivity to imperfections.

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Application of Load Carrying Sandwich Elements in Large Wind Turbine Blades

Jensen, Jacob Fisker / Schultz, Jacob Pagh / Berggreen, Christian / Branner, Kim

Abstract The present work investigates the possibilities and drawbacks when applying sandwich as opposed to single skin composites in the flanges of the load carrying spar in a future 180 m wind turbine rotor. FEA is applied to investigate two basic designs with single skin and sandwich flanges respectively. For a single skin design, buckling is critical compared to other design criterions. By introducing sandwich, a significant weight reduction and increased buckling capacity is obtained. Tower clearance now becomes critical. Proper choice of core material and thickness is important to prevent face wrinkling and large tip deflection. Geometric non-linear analysis showed sensitivity to imperfections.

Application of Load Carrying Sandwich Elements in Large Wind Turbine Blades

Jensen, Jacob Fisker / Schultz, Jacob Pagh / Berggreen, Christian / Branner, Kim

Abstract The present work investigates the possibilities and drawbacks when applying sandwich as opposed to single skin composites in the flanges of the load carrying spar in a future 180 m wind turbine rotor. FEA is applied to investigate two basic designs with single skin and sandwich flanges respectively. For a single skin design, buckling is critical compared to other design criterions. By introducing sandwich, a significant weight reduction and increased buckling capacity is obtained. Tower clearance now becomes critical. Proper choice of core material and thickness is important to prevent face wrinkling and large tip deflection. Geometric non-linear analysis showed sensitivity to imperfections.

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Title:

Application of Load Carrying Sandwich Elements in Large Wind Turbine Blades

Contributors:

Jensen, Jacob Fisker (author) / Schultz, Jacob Pagh (author) / Berggreen, Christian (author) / Branner, Kim (author)

Published in:

Sandwich Structures 7: Advancing with Sandwich Structures and Materials ; 947-956

Publication date:

2005-01-01

Size:

10 pages

ISBN:

978-1-4020-3848-8 , 978-1-4020-3444-2

DOI:

https://doi.org/10.1007/1-4020-3848-8_95

Type of media:

Article/Chapter (Book)

Type of material:

Electronic Resource

Language:

English

Keywords:

buckling , sandwich , non-linear FEA , sensitivity analysis , wind turbine blades Engineering , Building Construction , Engineering, general , Engine Technology , Computational Intelligence , Theoretical and Applied Mechanics , Continuum Mechanics and Mechanics of Materials

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