Validation of a Finite Element Model Used for Dynamic Stress–Strain Prediction

Abstract

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.