Validation of a Finite Element Model Used for Dynamic Stress–Strain Prediction
Modal testing is performed on wind turbine blades to provide information that is necessary for model updating and validation. In this work, a finite element model of a small wind turbine blade is developed and is used to perform dynamic stress–strain prediction using digital image correlation techniques. In order to assure that the model is appropriate for this work, a modal test is performed and correlated to the finite element model. Several blades are tested to identify the variability expected in the as-built configuration. This paper presents the test, analysis and correlation for this wind turbine blade.
KeywordsFinite Element Model Mode Shape Digital Image Correlation Beam Element Wind Turbine Blade
Southwest Windpower supplied several blades and CAD models and provided consultation during the course of the capstone project related to this work. The UMass Lowell team greatly appreciates Southwest Windpower’s time, support, and materials. The authors gratefully appreciate the financial support for this work provided by the National Science Foundation under Grant No. CMMI-0900534, entitled “Dynamic Stress–strain Prediction of Vibrating Structures in Operation”. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.
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