On Buckling Optimization of a Wind Turbine Blade

  • Erik Lund
  • Leon S. Johansen
Part of the Computational Methods in Applied Sciences book series (COMPUTMETHODS, volume 10)

Abstract

The design of composite structures such as wind turbine blades is a challenging problem due to the need for pushing the material utilization to the limit in order to obtain light and cost effective structures. As a consequence of the minimum material design strategy the structures are becoming thin-walled, such that buckling problems must be addressed, and in this work the aim is to obtain buckling optimized multi-material designs of wind turbine blades. The design problem consists of distributing multiple materials within a given design domain, and the candidate materials may be fiber-reinforced materials, oriented at given discrete fiber angles, together with isotropic materials like foam materials used for sandwich structures. The discrete design optimization problem is converted to a continuous problem using the so-called Discrete Material Optimization (DMO) approach based on ideas from multi-phase topology optimization where interpolation functions with penalization are introduced. In this way traditional gradient based optimization techniques including efficient methods for design sensitivity analysis and mathematical programming can be used for solving the multi-material distribution problem. The multi-material topology optimization approach is demonstrated for buckling optimization of a 9 m generic wind turbine blade test section.

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Copyright information

© Springer Science + Business Media B.V 2008

Authors and Affiliations

  • Erik Lund
    • 1
  • Leon S. Johansen
    • 1
  1. 1.Department of Mechanical EngineeringAalborg UniversityAalborg EastDenmark

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