Accuracy of an efficient framework for structural analysis of wind turbine blades

J. P. Blasques, R. D. Bitsche, V. Fedorov, B. S. Lazarov

    Research output: Contribution to journalArticlepeer-review

    Abstract

    This paper presents a novel framework for the structural design and analysis of wind turbine blades and establishes its accuracy. The framework is based on a beam model composed of two parts—a 2D finite element-based cross-section analysis tool and a 3D beam finite element model. The cross-section analysis tool is able to capture the effects stemming from material anisotropy and inhomogeneity for sections of arbitrary geometry. The proposed framework is very efficient and therefore ideally suited for integration within wind turbine aeroelastic design and analysis tools. A number of benchmark examples are presented comparing the results from the proposed beam model to 3D shell and solid finite element models. The examples considered include a square prismatic beam, an entire wind turbine rotor blade and a detailed wind turbine blade cross section. Phenomena at both the blade length scale—deformation and eigenfrequencies—and cross section scale—3D material strain and stress fields—are analyzed. Furthermore, the effect of the different assumptions regarding the boundary conditions is discussed in detail. The benchmark examples show excellent agreement suggesting that the proposed framework is a highly efficient alternative to 3D finite element models for structural analysis of wind turbine blades.

    Original languageEnglish
    Pages (from-to)1603-1621
    Number of pages19
    JournalWind Energy
    Volume19
    Issue number9
    Early online date15 Oct 2015
    DOIs
    Publication statusPublished - 1 Sept 2016

    Keywords

    • beam model
    • cross-section analysis
    • structural analysis
    • wind turbine blade

    Fingerprint

    Dive into the research topics of 'Accuracy of an efficient framework for structural analysis of wind turbine blades'. Together they form a unique fingerprint.

    Cite this